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Join Date: Feb 2008
Location: United Kingdom
Re: V6 water temp like a yoyo HELP!
what concerns me is that this started very suddenly. the car isn't overheating, just running a lot hotter whenever i put my foot down. QUOTE]
Let's start with this comment,
Is it loosing water?
Is there clouds of white smoke (steam) behind you when you boot it?
Do you have milky oil on the dipstick and in the filler cap?
You say there's no hiss when you open the expansion tank. Well if that's the case a gasket has gone somewhere. The pump is the prime suspect normally, but the lack of pressure in the tank after running points to head gasket and as to which one, well a compression test will tell you that, if thatshows up nothing then flush the radiator, it may be blocked, this now doesn't sound like the T'Stat as the temp is hiting 90 so it would only leave the water pump, Or in the worst case you have a cracked head or block.