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Old Jun 15th, 2021, 21:01   #6
volvulus
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Last Online: Apr 18th, 2024 18:57
Join Date: Feb 2009
Location: amersham
Default filler cap

Quote:
Originally Posted by Ian21401 View Post
How old is the expansion tank cap? Does it need replacing?
Any excess coolant should return to the radiator via the overflow hose.
How full is your expansion tank normally? I have a mark halfway up the wall of the tank. I rarely need to top it up but when I do I never fill past that mark.

The cap is the original 1992 as far as I know, I was wondering if it could be suspect.

I cleaned out some sludge from the tank and looked at the 2 poppet valves in the cap; were a bit brown with rusty water but seemed to work.

Are they prone to fail?

I keep the level at the max mark or just below.

thanks for reply Ken
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