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Re: When you say cap is fine, at what pressure does it open Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: Re: When you say cap is fine, at what pressure does it open, KPD4ALL, Sun, 11 Apr 2004 19:50:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
So when you wipe the expansion tank clean with a rag you can clearly see that the coolant is seeping out from under the cap?
I have seen speck of dirt getting stuck in a new cap and keeeping the check valve open.
The expansion tanks have a tendency to crack and leak from the upper/smaller hose nipple (the one going to the radiator), so if you only see the coolant somewhere around the expansion tank it might be that nipple. Try to wiggle it a little and see if it breaks of. If it does, it was bad and needed to be replaced anyway.
In a few cases I have seen expansion tanks warp, not allowing the radiator cap to seal properly.
Anders
posted by 66.229.13...
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