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Stronger Spring On Radiator Cap?


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#1 HUBBA.HUBBA

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Posted 09 July 2017 - 05:07 PM

I have a 15 cap that lets water past when engine is turned off. is there a stronger one available?

Edited by HUBBA.HUBBA, 09 July 2017 - 05:10 PM.


#2 nicklouse

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Posted 09 July 2017 - 06:27 PM

if it is only happening when you turn off i would fit a thermostatically controlled electric pump.



#3 mini13

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Posted 09 July 2017 - 09:37 PM

With a 15lb cap boiling point should be around 120+ degrees, that should be more than enough

#4 nicklouse

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Posted 09 July 2017 - 09:47 PM

just be aware there are caps that look correct but are shorter than the Mini rad needs.

sorry dont know the lengths.

#5 HUBBA.HUBBA

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Posted 10 July 2017 - 07:18 AM

Think I may have an spi cap on that is supposed to work with an expansion tank. It's probably dripping all the time when hot but I only notice when I've stopped

#6 minimans

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Posted 10 July 2017 - 09:00 AM

Don't overfill it. or you will never stop it dripping. Fill the radiator to just over the tubes or there's no where for the water to expand to when it gets hot...................



#7 HUBBA.HUBBA

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Posted 10 July 2017 - 11:47 AM

Don't overfill it. or you will never stop it dripping. Fill the radiator to just over the tubes or there's no where for the water to expand to when it gets hot...................


Actually, I was filling it up to the neck!

#8 mini13

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Posted 10 July 2017 - 11:56 AM

early cars had a level thingy in the rad, it was about 1/2 way up.



#9 HUBBA.HUBBA

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Posted 11 July 2017 - 10:21 AM

Yep as suspected. I had a later type cap. Got a '80 - '92 one on and do far so good.




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