What causes air in coolant system diesel reddit. I steer clear from water cooled bikes unless the cooling system is immaculate. Faulty water pump: A worn or damaged water pump can result in reduced coolant circulation, leading to coolant loss and potential overheating. It's a 10 psi system, so no leaks to be found there. It is simply heat - the air above the fluid level heats up, expands, push coolant into system as rubber hoses are flexible their volume increase, coolant level drops. 0 you have a cracked head. You can buy a block test kit and test it yourself to verify. It's an expensive fix. Even when opening the ventilation cap when filling before starting, you will still have some air left in the coolant. It would be pressurized only when your fuel pump was running. Thank you for posting to AskMechanics, Relative_Form! Use the proper coolant. Mechanics thinking it’s a bad EGR cooler. It is bad head casting leading to coolant (all be it a very tiny amount) leaking into the combustion chamber on initial start up . You instead are supposed to use a machine that pulls a vacuum on the cooling system like this one but also pressurize the coolant holding tank and pushes coolant back into the truck through the bottom of But that is the easy part. At that time there was no oil/coolant mixing it just leaked to the outside. I don't think you have a head gasket problem. 3. Nov 16, 2021 · 5. Also why cranking the fan immediately when its cold only blows cold air. If you want to go with air cooling Noctua is typically recommended as the top CPU air cooler. As the bubbles implode on the outside of the cylinder wall, the metal will eventually corrode and form cavities. The latter method is more reliable, and usually easier to accomplish. Moving the coolant by hand has kept the temp regulated for 4 days(I drive pretty far each day for work). Get one of those radiator no spill funnel kits and run it attached to the radiator filled with coolant. The AC fan blows air over the coils and that’s how you get cold air in the vents. Letting air out but not coolant (in most cases). Took the truck to volvo dealer, they diagnosed it as oil cooler. Nov 8, 2015 · So with coolant temp at 202F I opened the cap and a lot of coolant came out, if I had to guess about 4 gallons and with enough force to cover my hood. If a t-stat is stuck shut, the coolant will overheat, creating excessive pressure, and coolant/pressure will be bled off to the overflow. Any trapped air hopefully is pushed out into the overflow tank. It may be evident with traces of car May 22, 2011 · Trucktool. when you fill the system you need key on engine off, blower on min and heat max, with the bleeder screw cracked. Keep your coolant system clean. 199K subscribers in the AskMechanics community. now that brass reducer also contains a thermostat syle check valve of some sort as well, and yes That can happen if the cooling system has recently been drained and re-filled. Tri-fold tonneau cover, weathertech vent visor,Ford floormats and splash guards. Low coolant level. System maintenance. This causes a pressure release through the cap when the engine warms up then air intrusion through the cap when Dec 21, 2013 · The RPM would create the pressure, but I doubt this is the issue. #2. Internal combustion engines need clean air to work properly; otherwise, power and efficiency quickly decline. This engine coolant pump circulates the coolant through the cooling system. May 1, 2014 · 10 posts · Joined 2014. Check the exhaust for excessive white smoke, check the coolant for any sludge, look around for an external leak, recheck the oil by removing the oil filter, check the coolant offgasses by using an sniffer, check the interior floors for coolant. If it overheated the chance of a warped head are high too. They do fail with time. Apr 19, 2015 · Let the engine cool down. ago. Cylinder liners physically damaged or cracked ever so slightly or head gasket are my guesses. I have the DEEPCOOL El Captain 240 and absolutely love it. I suppose you could hot-wire the fuel pump and see if the coolant level rises. Elizabeth Nelson, coolant program manager at Polaris Laboratories, a fluid-analysis company in Indianapolis, Ind. Failure to properly Mar 19, 2021 · Had coolant tested for carbon and blue turned to green & replace the head gasket and studs. 3 and 6. •. Remove the radiator cap with the engine off and cooled down. Separate system. It’s better to do it than not. I was topping up with coolant before and after every drive and it must have just been boiling off with an air bubble somewhere stopping it from circulating. Shortly after install I had a slight pressure issue in my coolant system but was advised that it was normal. Just installed 2nd water pump replacement recently and now heater core is leaking. air bubble in coolant system. Air pockets in the cooling system can definitely cause fluctuations in the dash gauge. run the engine to operating temp, let cool down all the way and fill the coolant as needed. Once you have repaired the problem, you must refill the cooling system and bleed it. We replace the coolant reservoir. Also have eliminated the EGR cooler. 2 has a Tech service bulletin regarding this issue. Can also cause the car to over heat as it will develop hot spots in the engine with air hitting what needs to be cooled instead of coolant. May 17, 2009 · off of the upper radiator hose that connects to the engine side, which contains the thermostats housing there is a brass reducer fitting that reduces it from that metal tube to a 3/8s line which appears to go into the bottom of the turbo and out then returns back down into the water pump area. The valve should open when there is 25psi differential across it. 17 posts · Joined 2011. So antifreeze usually ethylene glycol is added to the water Cut a hole in the bottom so there is no pressure build up and insert. It's why you see the suggestion to crank the heat to prevent overheating; that sinks heat away from the engine. The cooling system is designed with this in mind. A worn water pump can develop leaks in two ways: 1. If the cap is stuck, it will cause a collapsed hose when cool. The water pump wouldn’t cause this. hi, i changed my air intake hose and i had to disconnect a coolant hose, some coolant spilled, i’m wondering if the air i introduced in the system might cause problem or my car should run just fine, pls help a learning mechanic, thanks everyone. The block has to heat up, and transfer to the coolant before that can be transferred to the cab. Extra fuel flow can be caused by several things, bad injector (s), stuck mechanical fuel rack, failed governor, bad turbo oil seals, etc. Check it every few minutes and fill with coolant, once it bleeds the air out of the Attach to the radiator and fill it halfway with coolant. The block could be cracked and there is no saving that. You can search and find “coolant flush” on YouTube, where a plethora of how-to videos are available. I've never heard or seen anyone in real life use distilled water. This can lead to serious damage to the engine and may even cause it to catch fire. The job of the car’s cooling system is to allow the engine to quickly attain its maximum temperature, maintain that temperature during its use and release the excess heat into the air. Sep 11, 2023 · The cooling system is a sealed pressurized system, so when you have a leak, it allows coolant to escape. #1. Coolant expands as the engine goes from cold to hot and it needs somewhere to go. With high compression the engine works like a well. it could also be a radiator hose, a cracked overflow tank, a leak in the hose connecting the overflow tank to the radiator, just to name a few things. This is to purge out any pockets of air which might be in your cooling system. It’s a closed system when the cap is sealed. 06 F-250 x/c 4X4 sb 17" alloy wheels. It’s pushing coolant into the fuel return, and it’s getting returned to the tank and sucked back up, and caught by the separator filter. This technician is taking a coolant sample from a radiator -- a very important part of any maintenance program. Too many things to mention since but here's my issue with info I think may be important. 2. The next possibility is the thermo getting stuck, but a bad thermo wouldn’t cause a CEL so that seems unlikely. #1 · May 1, 2014. Inverse happens when you release cap, warm air escapes, rubber hoses push coolant back into reservoir. #9 · Jun 4, 2011. there is nothing else under the hood that can pump that much pressure into the cooling system. It can take some time for all the air in the system to purge. 9. Sep 28, 2010 · The Basics of Diesel-Engine Coolant. One of the most common sources of coolant leaks is a bad water pump. It’s worth mentioning here that the front of the car was elevated for this step. If it’s not low, don’t add any. Oct 16, 2010 · This means there's very little coolant circulation through the radiator; The coolant in the radiator isn't being warmed up. As for the heater core, the only way to tell is to do a flush. other tech stated it was over heating however it was pushing out coolant rather than boiling over. Only do this when coolant temp is below boiling. HarleyD headlights, Duplicolor bedliner coated bumpers, 08 rear bumper and taillights, herculiner Yes. If you suspect air pocket, try bleeding the coolant by loosening the allen bolt. Without this protective coating, fuel combustion in the engine can cause the cylinder wall/liner to vibrate, which generates more air bubbles. Causing coolant system to be starved of coolant. There could also be a leak between the pump and engine block if the pump's gasket has failed. • 1 yr. If you were loosing coolant with no pressure on the rad hose, resevoir, etc Detroit Diesel, for example, will deny a warranty claim on an EGR cooler if the technician fills the coolant from the top of the surge tank. Monday they tore the turbo side down, swapped the cooler and got it up and running, thendid a coolant flush. My friend has a 2005 6. Leading to a small amount of coolant loss over time. This is the easiest problem to fix out of all the ones listed, as nothing actually needs to be repaired in this case. Here recently, I could top off my coolant reservoir, start the truck and 5 minutes later, The overflow would dump all the coolant out the overflow tube. Aug 7, 2022 · Fully deleted and getting pressure into expansion tank causing antifreeze to move over and not come back. What happened on my mum's car is that the coolant goes from the engine through the oil cooler and the EGR cooler and then the heater core, the heater core was blocked which caused the EGR cooler to boil the coolant resulting in a burnt coolant smell, no heat in the cabin and a loss of coolant. Replenish as necessary till it stops burping. When the coolant level drops under the minimum required levels, due to leaks or water evaporation, the pump will suck air from the expansion tank. A fuel-rich mixture will not burn completely and will leave the engine as soot, producing black smoke. Insert your funnel into the radiator. This is a death sentence for an engine because the oil no longer This interaction can occur between steel and aluminum components in the cooling system and cause them to be eroded away. Feb 12, 2012 · Mar 19, 2013. Kiss of death for diesel injectors. If it's clogged you'll see cooler spots. It's inexpensive and easy to do. The boiling temp gets raised when water is under pressure. As coolant gets hot, it expands, and overflow tank allows it a place to go and also helps purge air out of the system, since the air will be pushed to the top of the radiator, when pressure increased enough, the spring loaded valve in the radiator cap will open and the pressure will push the air and excess coolant down the tube into the Hey there, So yesterday I was looking at my engine (my turbo hose came loose, I fixed it), and I noticed that my coolant level has dropped since the last time I had taken a look in early May. Thermostat failure: A malfunctioning thermostat may not regulate coolant flow properly, causing coolant loss and inefficient cooling system operation. 2 head gasket changes, fire ring and ARP 425 studs. For liquid there are plenty of good options. That’s why there’s a puddle of water that forms under an idling vehicle in the summer Apr 27, 2007 · IMO, there probably should be some residual pressure in the cooling system if its in good working order. The coolant helps to keep the engine at a constant When coolant heats, it expands, adding pressure to the system. Jul 22, 2023 · In summary, coolant is of utmost importance for diesel engines as it prevents engine overheating, enhances engine performance, and extends the engine’s lifespan. airgator said: I have a customers 01' IH4700 with a DT 466E that is building alot of coolant pressure. But you don't even know why the coolant is mixing. If it doesn't you need to find out where it is going. But a Water Antifreeze mix will boil closer to 225°F. I dont know why i wouldnt have considered that. The coolant pump has a seal which prevents coolant from leaking past the bearing. #2 · Feb 28, 2011. When you're topping it up do it from the thermostat housing cap not the reservoir, and bleed it every time. 2009 challenger I noticed my car making a bubbling sound when I got out so I lifted my hood and seen my coolant completely filled to the top of the overflow side and just bubbling also leaking from the hose connected to the overflow side, I did replace my radiator about 2 months ago could I have just bled my system wrong there’s a new cap don’t think it’s a pressure issues If there is hydrocarbons in the coolant system, overheating it likely popped your head gasket. It will hold 11 psi in the cooling system for at least an hour when cold using a pressure tester. Feb 17, 2012 · When there are fluid voids in the system cast iron sees O2 from the air and causes rust which washes off and causes the brown sludge. RickMN • 2 yr. I don't see why not. Leaking shaft seal – The water pump’s metal impeller shaft passes through a rubber seal. I noticed my coolant in the radiator was low recently but the reservoir was still at the correct level. Air would still travel through the water pump. 0 TDI. Feb 28, 2011 · 851 posts · Joined 2008. I've never seen a cooling system blocked with "deposits", other than rust/goo on 30 year old cars with about as old coolant in them. Mar 13, 2010 · Head gaskets. . When the engine stops and cools, the valve closes again. You need to do it, whether or not your AC is working is not relevant. Head gaskets are a trouble-spot on the 01's, and CAP describes the symptoms of blown gaskets. Aug 1, 2020 · Bad Coolant Refill: It's possible that if you're refilling the coolant in the tank, or if you flushed it incorrectly as well, the air could have been trapped in the system that will need to be flushed out a second time. The 2014-2018 5. 10. It's impossible to have any idea where it's leaking for sure without being able to inspect it. We bresth a corrosive gas and drink the most powerful solvent known which both of those things basically destroy everything else butvwe need it to livr sure bacteria in your engine coolant. truck did not reach 140 degress and was pushing All my bikes are oil cooled except my yamaha(air cooled) The cooling system is one of the only weak points in vintage bikes (old fuel is pretty bad too. Since This isn’t entirely true. Then the coolant is sucked back from the overflow tank refilling the void in the radiator. Overheating an engine runs a very high risk of physically and permanently warping the top half of the engine, known as the head. IF you have diesel in the coolant, you then have coolant in your diesel injectors which rusts them out. Those engines are known for head gaskets. I just bought a venturi coolant refill system off the matco truck, i read the instructions and saw that it shouldnt be used on cooling systems with a max psi of 13psi or less, what is the normal operating pressure of a cummins x15 system? Off the top of my head it's 15psi, can't imagine it'd be lower than 13. you fill it until coolant comes out of the bleed screw and there are no more bubbles coming with it, then you tighten the bleeder. Fill the radiator If you have an air compressor and an air gun leave the fuel filters loose and push air into the tank till fuel comes out of the filters and tighten them back up (no this will not cause excess air to get in the system) or just fill the filters with fuel/trans fluid/or seafoam, same with the oil but obviously fill with oil lol Jun 3, 2019 · So your "25psi" relief valve is set to relieve pressure at 25 psi gauge. Mar 9, 2023 · 3. Hey fellas, it's been a minute since last post. I would test the other way. Lately, there is excessive pressure in the cooling system. Cummins x15 coolant pressure. Keep the radiator cap off, run the engine to where it gets hot enough to open the thermostat and cycle the coolant. Overflow/splash will stay in upside down container and flow back into radiator. Not even the appearance of an oil slick with the rainbowie (yeah thats a word) colors. At zero on a cold start then slowly rises to half on the gauge after about 5 or 10 minutes of driving. Ensure proper airflow through the fins. It’s also possible that one of the radiator hose clamps (or other coolant hose clamps) aren’t tight and you’re slowly losing coolant that way. After filling, I started the engine to bleed the air out and waited until it got to operating temperature, but the bubbles kept coming up from the radiator even after 30 minutes. Mar 3, 2024 · A damaged or split radiator is a common cause of overheating and low coolant levels, and it is also responsible for the buildup of air in the cooling system. Nov 19, 2020 · Cavitation starts with air bubbles degrading the protective oxide film on the cylinder wall. As the coolant cools down it creates a vacuum in the cooling system. Electrolysis Uses coolant to absorb heat from the engine in internal passages and allows to the coolant to flow out to a heat exchanger to transfer its heat energy and then return to the engine to absorb more heat. This, combined with the fact that the base materials of a OAC coolant react poorly with plastic (re: the intake gaskets in 3x00 engines vortec 350s) makes for a horrible combination. Check the thermostat housing and the gasket for it, common fault. There should never be air inside the cooling system. , tells a story that would strike fear into the heart of any fleet manager. 6. I’m not overheating, not blowing any white smoke/exhaust. Just because it makes such a mess when you get a huge air pocket out and coolant literally splashes Either flush the coolant yourself, or take it to a gas station garage and ask them to do it. If any doubt replace the cap. May 30, 2020 · The build included upgraded rods, cams and studded heads. wrenchguy1980. Heat comes from the engine, via the coolant system. I filled the system and ran it to get any air out that I could. Custom pinstriped Power Wheel. May 20, 2011 · Cracked injector cups will lead to fuel in coolant, but if you have cracked injector cups on a 6. If you discover that the level of your coolant is low, top it off and pay attention to the reservoir for a few days. The most common causes of BMW coolant leaks include: Failed Water Pump. Is the coolant Pink? Toyota usually uses a Pink HOAT coolant. Oct 10, 2012 · Its not showing up in the radiator when I remove the cap. Last could be the temp sensor but it seems to behave normally. I closed the radiator cap and let everything cool down. The only time air can vent out with the cap on is when the cap opens. Waited a couple days for parts to show up. Without proper coolant, the engine would be prone to overheating, which can cause significant damage and reduce its efficiency. The S2000 has 2 coolant bleeding valves: One near the intake manifold on the front driver's side of your valve cover, and a heater core bleed valve located near the firewall. Sep 11, 2023 · The water pump is the heart of your BMW’s cooling system, circulating the coolant through the engine and radiator. Nov 16, 2017. There are two types cooling method in diesel engine, water cooling and air cooling, and at present, there are two kinds of engine water cooling system, one is the traditional belt engine water cooling system, the other is the electronic fan engine water cooling system. Air in the cooling system won’t allow the coolant to pressurize properly which causes it to have a lower boiling point and will cause overheating issues. Looks like gases enter the jacket under load, accumulate and then rush up to expansion bottled causing it to overflow - overflow pipe is Reply. Generally speaking, those are the only two places they get clogged. I thought it might be a blown head gasket, but wouldn't that lead to lowering coolant levels instead of maintaining the same level? Any ideas on what this could be would be helpful. Just sludge in the coolant overflow. When cooling, air can penetrate through cracks found in the radiator or heater. The benefits of liquid cooling is pretty significant and completely worth it IMO. 5 6. But you'd see fuel floating on top if it's gotten high enough to reach the cap. The engine heats up and the leak stops . The problem with dexcool is very simple It rapidly turns acidic when exposed to the atmosphere. May 3, 2004 · Therefore, it seems logical to me that the symptoms you noticed were the result of something else. By sticking it in the coolant system you are effectively changing its atmospheric conditions. The cooling system is composed of various parts: the radiator, pressure cap, fan, pump, thermostat, hoses and overflow tank. Use compressed air to remove dust and light dirt. I would rather not have to pay for a repair that it doesn't When the engine warms up, the wax melts, expands and pushes the valve open, allowing coolant to flow through the radiator. 8. uhhhhhhhryxn • 2 yr. You could have to replace EIGHT injectors just to get to run right again. Slowly loosen vent fitting (1) to purge any trapped air. The cap also is suppose to let air back into the system as it cools off. I also inadvertently did a drain and fill. 7L 2500, Straight flange 2nd gen, ARP 625, Thuren/Carli goodies. still losing coolant. Top up to radiator level after each burp. My aux water pump works sometimes, i hear it push fluid. Reply. Nov 9, 2023 · If the cooling system in a diesel engine is not working properly, it can cause the engine to overheat. Probably a weak HG seal. 5. compressor and the headgasket works like a checkvalve. So would a big air bubble cause it to shoot out like it did and since most if You need to run your car on idle for about 30 minutes to an hour (depending on how much air has to be bled from the radiator), with your radiator cap off. Have the heater core on high and run the engine to operating temperature. Another reason for excess air in the system is caused by running the expansion tank level too high. Fill and Bleed the Cooling System. I have changed thermostat, radiator cap, and pulled water pump and checked it, passed combustion test, also flushed what lines I could except the radiator. Stuck thermostat, or complete blockage of the cooling system somewhere. After that did the 30 miles back home coolant temps were normal and level stayed the same about 3/4 of the reservoir. If it was a cracked injector cup, your coolant tank would be puking fuel out of the cap. Repeat step 3 - 5. You can check your radiator using an infra red thermometer. Remove dirt and debris from the radiator core area. If air is still present. However, it could be a slew of other things too. As the coolant in the engine reaches temp, the t-stat opens and there's a flood of VERY cool coolant, this causes the temp gauge to drop and the t-stat to close because the coolant is below temp again. Son of a bitch. If this seal fails then coolant can seep out where the coolant pump pulley shaft enters the pump housing. But, since its an 01, you might want to have the resivior cap pressure-checked. Old coolant can corrode your cooling system, making it less efficient, wear your water pump and eat head gaskets. It's tough to detect diesel exhaust in the coolant with most testers. The temperature change causes condensation to form on the coils which drips out of that hole onto the ground. The pump sends cooling fluid to 4. If dealing with an oil film, use a cleaning solution and water at low pressure. 2013 Mk7 Golf 110TDI is pushing coolant out from the surge tank. Even if you gravity fill the system, you can use the vacuum filler to apply a vacuum to the cooling system and suck the air pockets out. How to bleed coolant system Have a 540 and just replaced my expansion tank and I have to bleed my coolant system, I do the procedure and check the level but I still keep getting check coolant level. After I noticed the coolant spewing from the overflow tank. Well ill be damned. So when the coolant cycles through out the system, it should bleed air out from the radiator cap opening. Dec 16, 2010 · Coolant maintenance prevents diesel downtime and costly repairs. truck was brought in for CEL being on. Psia would be subject to atmospheric conditions. Nov 16, 2017 · Mk7 Golf 2. That’s the drain hole for the evaporator coils in the dash. Here are the steps to help you with this procedure. 1. still overflowing. Again another indication that it might be a hg. Go for a 30min drive to get the engine up to temp and thermostat open, check the you are getting heat inside the cabin, check top and bottom radiator and hoses are hot then siphon the excess coolant out. Ideal gas law, PV/T=constant is applicable. When the head warps, the air-tight seal (head gasket) between it and the bottom of the the engine (the block) fails and allows oil and coolant to mix. I've never seen a coolant bottle that recommends distilled water, and I've never seen distilled water marketed and sold for mixing with coolant. Your edit is exactly how an at-home flush works. Hi all, decided to share my pain with VW community after ~8 months of troubleshooting by VW (Australia). As others have suggested, it’s a cylinder head problem, either a crack, or pitting around the injector cups. Rubbertutti. The engine cooling system and HVAC system are two separate and enclosed systems. So they design in 6-12% expansion space in the tank. By using the right coolant and following recommended Oct 9, 2012 · If all else fails, you could try jacking up the front of the car to elevate the radiator and then run the engine for a good 20 minutes or so (make sure you hit full temp) with the radiator cap off to let all air work out of the system. Boiling would be expected, but you should be able to burp the majority of the air out before it gets that hot while it’s idling. Let it burp completely till it stops bubbling, Each time it burps, the air pocked is being purged and coolant takes up the volume that the air pocket took up in the cooling system and you'll noticed coolant level goes down. Pressurize the the intake system above 20 PSI and check for bubbles in the coolant. Check coolant level in coolant recovery container. The volume of coolant added to the engine must be within 1. Sep 3, 2012 · klhansen. I guess all the oil is just making its way to the top of the radiator and the pressure from the system is pushing it into the overflow. To maximize your diesel engine’s performance, keep the air intake system clean and well-maintained. I find that weird. Fill to FULL line. The new rad likely has more volume of coolant and you no longer have enough expansion space in the surge tank. Today we mainly talk about water cooling and belt driven engine. It runs at about 188°- 196° At 206° the fan kicks on. Only starts dropping after the fan has been on for 15 minutes non I replaced it and did a thermostat at the same time since the hoses had to come off anyway. I mean as humans we are extremophiles. Order Air Intake Parts. Flushing your coolant is a great way to get rid Feb 7, 2024 · The coolant level probably dropped as the cooling system was bled of air over time. Apr 20, 2022 · Coolant pump seal leaking. The bubbles you noticed were the result of air in your cooling system after maintainance. magnesium especially as well as other metals get destroyed from sitting in old coolant for years. As another user suggested, use a spill-free funnel that adapts to your radiator cap. [deleted] • 5 yr. You don’t want too much space or the system will never build pressure to protect from boiling. You overfill because when it self bleeds the coolant level will drop, but not that much. 07. Pulled over about 30 seconds onto a wide spot, checked coolant and found a coolant reservoir filled with oil. Since there's not an external ignition source on a diesel, you have to either shut off fuel, or shut off air. 0L Diesel that we have done head gaskets and stud kits on. Over time, this seal dries out and leaks coolant from the pump housing. This has been analyzed by an independent shop and determined to NOT be combustion gases in the cooling system. Been 3-4yrs ago. A failing/failed water pump will cause the same issue. You don’t have the radiator cap on, so the system is not holding pressure. After replacing the coolant, you have to bleed the rest of the air out of the system or you risk overheating. Once you have filled your radiator with new coolant, add excess coolant up to 1/4 the Thanks for the reply! Sure, it could be the radiator. Water expands when it freezes, and if the water in an engine freezes it can burst the block or radiator. Leaking radiator or heater. Cooler running systems and less noise. 7. If that’s not available, then make sure you’re actually running the engine long enough to get the thermostat fully open. A class-8 on-highway truck seemed in fine condition when it left the West Coast, but at the end of its 6,000-mile cross Dec 2, 2012 · Shut the engine down and wait till engine is cool. The cooling system in a diesel engine works by circulating coolant through the engine block and radiator. Check the overflow tank for proper level every morning after a refill. 5 quarts of the volume drained. If you see coolant level drop, add more coolant with the engine running until it's topped off and staying full Mar 29, 2020 · Pressure in coolant system. On initial fill, when there’s an air pocket under the T-stat, it’s not uncommon Apr 6, 2011 · The cooling system runs up to 15 lbs of pressure-- and should release any pressure over that. Once the engine is at temperature and no air bubbles are coming up out of the funnel you can remove it and put the radiator cap on. If this is happening it should be watched closely, and apparent coolant loss should go away within a few heat cycles. Apparently this is a common failure, so I took it off and examined it but it looks new, gaskets all seem fine, no cracks in the housing, and the coolant passage holds pressure if I block off one side and apply air pressure. qg pb gk xb cv fv sw ns bb ko