#BAD COOLANT RESERVOIR CAP FULL#

However, when you have a bad radiator cap, the car may release coolant to the reservoir without the excess pressure trigger. May 2015 - 97k: Changed and bled the coolant per the procedure in the FSM. Ideally, the engine releases coolant to the overflow reservoir to balance the pressure when it exceeds the recommended amount. You may have a loose cap, or you might have a damaged cap.

You need to check if your coolant reservoir is overflowing. July 2013 - 68k: Replaced coolant reservoir cap (OEM parts). You have to ensure that the coolant in your coolant reservoir is the proper level of your coolant. I'm thinking the cause would be one of several things.ġ) Bad radiator cap - An old cap may have a weakening spring which lets too coolant flow into the reservoir, overfilling itĢ) Blown headgasket - cylinder pressure is entering the cooling system, over-pressurizing the system and overfilling the reservoir.ģ) Bad reservoir cap - leaky cap not doing its job containing coolant in the reservoirīelow is some other relevant information: I'd hate to go another track day and have to deal with this problem again. It is important to check the radiator cap during routine maintenance, and never remove it when the engine is hot. Coolant leaks caused by a bad radiator cap can sometimes be hard to spot at first, as the level often changes with the engine temperature. A faulty radiator cap can cause leaking coolant, an overflowing reservoir, collapsed radiator hoses, the air inside the cooling system, and engine overheating. If you’re missing a coolant reservoir cap, first be sure to check your engine for leaks and replace the cap as soon as possible to avoid making a mess and having the engine overheat. A bad radiator cap will often start to show a problem with seemingly minor coolant leaks and gradually decreasing coolant levels.

#BAD COOLANT RESERVOIR CAP FULL#

It had no problems driving home (155 miles) with the AC on full blast the whole way.Īnyone else experience this problem at the track? I'd like to know how you fixed the issue. Driving without a coolant reservoir cap can lead to your car overheating, which can cause serious damage. My car never experienced any prior cooling issues until yesterday. A word of advice before buying a replacement radiator cap: make sure it is compatible with your car. A typical replacement cap however might cost somewhere between Php 200 to Php 1,000 and more. It was also super hot at the track yesterday (107☏). In the Philippines, the price of a replacement radiator cap will depend on the make and model of a vehicle. My car does now have 118k miles on the stock cooling system. I've done several track days prior to this and never had a problem. There was no white smoke coming out of my tailpipes. It made a mess in my engine bay.ĭuring the track day, the engine performed like normal. I never had a gauge on the system before I did my delete, so I don't know if it would build to 16psi or not.Yesterday at the track, I had coolant coming out of the reservoir during every session. He said that they would drain the coolant out of the system, refill it under vacuum, and that solved the problem. He said that trucks with an EGR delete on them were really bad about doing that (he didn't say why). He said that the air bubble would just stay in block and as the motor was running, the coolant around the edges of the bubble would slowly boil off from cylinder temperate and just keep building pressure in the coolant system. (I recently drained and flushed my coolant system when I did my oil cooler and EGR delete a month ago). He said that sometimes you can get a large air bubble in the coolant system trapped in the block if you don't use the special tool they had that would pull a vacuum on the coolant system before you filled it. Creeping up to 16psi coolant pressure after a few minutes of driving indicating a HG issue.but not overheating, not blowing smoke, not having dirty/oily coolant residue in the tank, not using coolant, no combustion gasses detected in the coolant, and only a drop or two of coolant out of the degas cap every now and then because the pressure built very slow and even when the truck was under load, not a big fast pressure spike like what is typical for a bad HG.causing cooling to spew from the tank. So I talked to a buddy of mine who is a Ford Master Tech.he said that back when he was working on the 6.0's all the time, every now and then he would see a truck with issues like mine. One more theory I wanted to toss at you guys before I press the 'order' button on my Amazon cart and get my studs and gaskets coming. The test I pulled in the degas bottle didn't even change the slightest color.strange. I'm pretty sure that the combustion test kit I got works on diesel.I tested the gas coming out of the exhaust tip and it instally changed from blue to yellow, indicating combustion gasses.

Bad coolant reservoir cap