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Model specific boards => Golf mk2 => Topic started by: HuwMk2 on 10 July 2006, 10:16

Title: Overheating???
Post by: HuwMk2 on 10 July 2006, 10:16

Hi. My mk2 overheats very quickly while idle in traffic. The temperature gauge soars right up. I have combated this by turning the blowers on full whack and full heat. What is the problem? Is it the fan?

Title: Re: Overheating???
Post by: Judderi on 10 July 2006, 10:22

1st thing to check would be the fan. If it does not come on then there is a fault. To check if the fan is working then unplug the sensor plug in the bottom corner of the rad and bridge the pins. This should turn the fan on so watch your fingers! If it does then the sensor is shagged and needs replacing. If not then either the fan motor has blown or the wiring is fault. Replace both or do the cheapest 1st.

Title: Re: Overheating???
Post by: Gozza on 10 July 2006, 13:01

This happended to a Fiesta XR2I I owned once (I know, I know) turned out to be the relay was shafted and not telling the fan to come on. Replaced it and was sorted.

Would have to agree with the replace the cheapest bits first, although if you let the car get to operating temp with the bonnet open and the fan does not come on you can limit it to the wiring/relay/thermostat after you have bridges the pins again as mentioned by the Yoda of this forum  :grin:

All the best  :wink:

Title: Re: Overheating???
Post by: Judderi on 10 July 2006, 13:09

Repeat what i have said have you not. Hmmmm

Title: Re: Overheating???
Post by: frog on 10 July 2006, 15:47

Have you checked your coolant level? Also get the mixture checked,as an incorrect mixture will effect the boiling point

Title: Re: Overheating???
Post by: Gozza on 10 July 2006, 16:25

Quote from: Mk2GTI2.016v on 10 July 2006, 13:09

Repeat what i have said have you not. Hmmmm

Yip, shhhhh I am trying to make it look like I know what I am talking about  :evil:

Title: Re: Overheating???
Post by: keefusg60 on 11 July 2006, 14:22

Happened to me on my MK2 last year. Replaced the thermostat and that solved it. Had replaced the fan and fan switch first, but a thermostat + coolant is only cheap, so well worth doing first.

Title: Re: Overheating???
Post by: Judderi on 11 July 2006, 14:43

Where is the thermostat?

Title: Re: Overheating???
Post by: Veedubgt18v on 11 July 2006, 15:34

in the water pump housing behind an elbow bit of pipe

Title: Re: Overheating???
Post by: Judderi on 11 July 2006, 15:40

Does it have an electrical connector attached? Got any pics?

Title: Re: Overheating???
Post by: rubjonny on 11 July 2006, 16:49

Follow the hose from the bottom of the radiator, the thermostat is behind the plastic flange it connects to.  It has no electrical connection, it contains a lump of wax that expands & contracts with coolant temp.
To test if it is working, run the car from cold and feel the lower hose.  It should stay stone cold till the temp gauge gets to about half way.  If it gets lukewarm straight away, its stuck open/missing, if its still cold when the gauge gets to 3/4 its stuck shut.

The fan should kick in around 3/4, so check this as well!

Title: Re: Overheating???
Post by: HuwMk2 on 11 July 2006, 17:56

Before you all started hijacking! I thought I'd tell you that the problem was the fan switch. £21 + vat for a new one from VW.