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Model specific boards => Golf mk2 => Topic started by: xzakx9 on 22 January 2008, 21:55

Title: problem
Post by: xzakx9 on 22 January 2008, 21:55

i havent got my mk2 on the road yet but everytime i run it for a little while the water boils over......whats the problem with it??
zakx

Title: Re: problem
Post by: vw-bob on 22 January 2008, 23:12

its getting too hot  :laugh:

sorry couldnt help myself, but i cant be of any assistance

Title: Re: problem
Post by: takethefifth on 22 January 2008, 23:47

Expansion tank cap knackered?

Title: Re: problem
Post by: xzakx9 on 23 January 2008, 00:33

might be....how could i tell will it be obvious/???
zak

Title: Re: problem
Post by: Conker on 23 January 2008, 00:52

I think you would be able to see steam coming out of the cap.

Mine overheated for the first time a couple of days ago (albeit on a 150 mile trip) so I've been looking into this issue. The prime suspects are:

1  Expansion cap
2  Low level of coolant in the system
3  Poor ratio of coolant to water - should be circa 50:50
4  Air pockets in the system
5  System thermostat broken
6  Fan switch broken (is your fan coming on?)
7  Fan itself is broken
8  Dreaded headgasket


Perhaps you could tell us more about how it overheats, e.g. all the time, only at idle, is it drinking coolant, whats the oil temp like etc.

Title: Re: problem
Post by: Goops on 23 January 2008, 12:02

As Conker suggested its a process of elimination... follow the list (easiest/cheapest going forward)?

Quote from: Conker on 23 January 2008, 00:52

1  Expansion cap
2  Low level of coolant in the system
3  Poor ratio of coolant to water - should be circa 50:50
4  Air pockets in the system
5  System thermostat broken
6  Fan switch broken (is your fan coming on?)
7  Fan itself is broken
8  Dreaded headgasket

I have to say a flush is probably the most essential thing to do once you buy the motor! Worked a treat for me  :smiley:

Title: Re: problem
Post by: rossko on 23 January 2008, 16:44

waterpump/thermostat would be my first guess... does the fan kick in?

Title: Re: problem
Post by: bobbymk11 on 23 January 2008, 20:23

had same problem on my 1991 mk2 8v and tunred out needed new waterpump and thermostat...now runs fine...and also put old black expansion cap on..as new blue one was pi**....

Title: Re: problem
Post by: Agreeable Slick on 23 January 2008, 20:37

change the expansion cap, the seals on the caps are known for deteriorating and letting the water boil over. I think you need one of the blue ones, iirc, do a search of this section and it's mentioned in multiple topics.