Dean_W
Member
Registered: 13th Dec 05
Location: Downham Market, Norfolk
User status: Offline
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Come home, temp guage on 88ish. Turn off, open bonnet all is well.
Come home, let temp guage go to 95. Turn off, open bonnet, header tank expands to the cap. Hoses don't go solid even while the water is rising.
I have a little bit of mayo on the dipstick, but not much. None around oil cap or under cam cover. And none in header tank.
Ideas?
Seems a lot of people are having cooling problems recently 
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mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
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Water expands when it gets warmer, thats what the bottle is for, its an expansion tank really
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Dean_W
Member
Registered: 13th Dec 05
Location: Downham Market, Norfolk
User status: Offline
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So why only when the car is turned off? Surely it would do it while driving? That was at 95. I'm sure if it was any more the bottle would pop
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mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
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the water is still at 95 degrees when the engine is off, it cools down naturally then
there is a relief valve somewhere so all the coolent would end up on the floor
[Edited on 03-04-2007 by mattk]
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Vaux Lad
Member
Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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As matt said, the coolant cap has a pressure valve in that vents excess pressure if it reaches a certain level.
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deano87
Member
Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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Surely also the water wouldn't do it when the engine is running, because the coolant is actually running through the system?
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Dean_W
Member
Registered: 13th Dec 05
Location: Downham Market, Norfolk
User status: Offline
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I'm paranoid Deano.......If the HG goes, i'll hire a skip and throw it in there it's a ballache I don't need.
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