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bglz42
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Too much pressure in coolant tank
bglz42 replied to bglz42's topic in 986 Series (Boxster, Boxster S)
Thanks Papp_e! That solved it! Bought a new assembly from Pelican. I guess I was getting a false reading from my pressure gauge... -
I have been struggling for over a year with an issue with my 01 Boxster S Tip. Condensation under trunk lid over the coolant cap. I am on my 6th 04 cap. Never overheats. No water in oil or oil in water that I can detect. Level stays pretty consistent. Pressurized tank to 20psi for 24 hours. Pressure tested cap, pops at 20.5. Getting desperate, I left the pressure gauge on the car and started it. After it warmed I got 20psi, (which is enough to pop the cap valve apparently.) Again, the car does great even in Texas heat. It just vents through the cap... any ideas?
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Thanks for all your help!
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Went to the dealer today. They pressure tested both the tank and the cap. No leaks. But on the way home, red light started blinking. No overheat but tons of condensation. I could hear air escaping. Applied soapy water again to bleeder valve. Again no bubbles... it is coming from the cap. Maybe the threads boogered? A slight crack on the neck?
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Could it be overfill? The coolant level was very high. I pulled fluid out to exactly the MAX mark and will test today. I don't appear to be losing coolant. Just lots of condensation.
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OK I went out and bought a tester. I could not get the cap tester attachment yet, but was able to test the tank. I applied 18lbs for 4.5 hours. No leak. I am going to order the cap tester... could all three caps I bought (Suncoast & Pelican) be faulty?
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I will buy both the tank tester and the cap tester.
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I will buy one. If nothing else, this car is filling my tool box! Lol!
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No I have not done that... are you thinking that it's leaking?
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I am still struggling to understand how this cooling system is supposed to work... If you read my original post, the symptoms are still the same. Condensation under the lid, and the bleeder valve extended when hot. Never overheats. Is this normal? I have: Bought another 04 cap, (Actually I am on my third cap, thought maybe I was getting bad ones...) Evacuated the system using an Airlift, held pressure just fine. Wrapped the filler neck in teflon tape. Just yesterday, I lost some coolant when I removed the cap. Car was cold, and had been sitting for a week. About a halfcup of fluid came out under pressure. (Probably overfilled slightly.) I cleaned up the mess, applied teflon tape to the neck and re-installed the latest cap. Ran it for about 15 miles, and pulled back into the barn. I could hear a very slight hiss. I squirted soapy water onto and around the bleeder valve to see if there was a leak, and saw no bubbling. The hiss appears to come from the cap itself venting. Is it supposed to vent off the extra pressure? The bleeder valve WAS extended. Temp normal. I am taking the car to Boxstoberfest in two weeks, and it will get wrung out pretty good. I am a little nervous about it...
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It did not appear to. I carefully inspected the cap. It looks good. I just took for a test drive. Still some condensation and a little wispy steam. The bleeder valve is fully extended. Temp normal. I am beginning to suspect the cap.
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I pulled a vacuum on it this morning with my airlift. No loss of pressure after 20 minutes.
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I rebuilt the bleeder valve earlier this year. I am going to pressure the tank up, and see what happens...
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I am still fighting this issue. Bought a UView. Vacuumed it and refilled it. Rebult the bleeder. 04 Cap. Never overheats but lots of condensation under the trunk lid. Drove it on the freeway for 100 miles in the heat yesterday. As I returned to my driveway the light started blinking. Temp normal. After cooled, I removed the cap. Lots of pressure and level came up a lot. Added about a quart of coolant. Not sure where to go from here...
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That was EXACTLY what I was looking for! Thanks!