andrew-theasby
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| posted on 6/5/09 at 09:46 PM |
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engine coolant pressure cap
Sorry if this is a daft question but dont cars have a pressure releif valve in the coolant system anymore? Theres one on the old escort radiator i
have but not the polo one. I assumed they were on the header tank but just been browsing through ebay for a header tank and they all seem to just
have screw on caps? Am i missing something? Thanks
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indykid
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| posted on 6/5/09 at 09:56 PM |
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they do still have pressure relief mechanisms in the cap, so when they do vent, they vent all over the floor.
the key difference is in the header tank, which is half filled with air allowing the coolant to expand and compress the air rather than pushing it out
into a seperate bottle.
tom
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andrew-theasby
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| posted on 6/5/09 at 10:05 PM |
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I see thanks, thought it must have something in there, just couldnt work out why there was no overflow pipe. Cheers
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