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Model specific boards => Golf mk2 => Topic started by: Benrevs on 05 May 2009, 18:46
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Before anyone says "search" I have tried everything I know of. I know its a vr but the principles are the same? My header tank keeps boiling over way before the fan would usually kick in( just below half), also the level drops with a bit of revvage. I have changed the stat and the fan switch but hasnt made a wank of difference. I have flushed the block and the rad and all flows fine as does the heater matrix. The rad also warms up where it should do, have a sniffer on the header but came up negative for headgasket. Could a sketchy water pump cause this? Car runs fine also and no sign of head crackage etc.. Something I am over looking here?? I have the rad fans on a manual switch in the car for the moment. Ben
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im no expert lol but could it be a dodgy cap on the expansion tank?
Dan
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I used to get this with cheap coolant from halfords. The concentrated blue stuff.
Try the pink G12+ coolant from vw. Its cured this problem on mine. wierd
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Just a few ideas... PS Saw you parked up on the layby just past J17 a couple of weekends ago.
> Did you upgrade the rad and fan when you fitted the VR?
> Can you see a strong squirt of coolant into the expansion tank when you rev the engine i.e. the water pump is working. I presume this is possible on a VR??
> Whats the heater like? Does it get hot?
> Any leaks? (Prevents pressurisation)
> Does having the fan on manual prevent boiling?
> What are the temps like when it bolis over? If they are okay, its probably just a new cap/tank thats needed.
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Expansion tank cap.