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Model specific boards => Golf mk3 => Topic started by: andc1 on 30 August 2009, 12:54

Title: tempreture problems
Post by: andc1 on 30 August 2009, 12:54

ok put my heater on today for the first time, i let the engine get hot then i noticed that the temp gauge went down, turned the heater off and the temp went back up! any ideas? air in the system maybe?

cheers

Title: Re: tempreture problems
Post by: AudiA8Quattro on 30 August 2009, 13:01

How much did it go down?
It should go down a bit, as the heater matrix is like a small radiator.

Title: Re: tempreture problems
Post by: andc1 on 30 August 2009, 17:39

all the way!!!

Title: Re: tempreture problems
Post by: gtigolfthree on 30 August 2009, 18:12

Is the heater hot?

Title: Re: tempreture problems
Post by: andc1 on 30 August 2009, 18:39

no goes colder with the temp

Title: Re: tempreture problems
Post by: AudiA8Quattro on 30 August 2009, 18:53

Thermostat stuck open.

Title: Re: tempreture problems
Post by: andc1 on 30 August 2009, 20:16

Easy enough to change on a 8 valve or not? 

Title: Re: tempreture problems
Post by: Wayne on 30 August 2009, 21:37

Yes easy enough to change.

Title: Re: tempreture problems
Post by: andc1 on 30 August 2009, 22:50

Where am I looking in the engine to find that then?! 

Title: Re: tempreture problems
Post by: gtigolfthree on 31 August 2009, 09:02

Its under the alternator, take the alternator off, taking the alternator mounting brackets makes it easier but you can do it with it on, then two 10mm studs at the bottom of the water pump holding a plastic pipe, make sure there is a new rubber seal with the new themostat. You will need to refill and bleed your coolant.
http://www.golfgtiforum.co.uk/index.php?topic=106380.0

Title: Re: tempreture problems
Post by: rubjonny on 01 September 2009, 10:28

how quickly did the temp change? if it happened instantly then it could be an electrical fault, if it happened gradually then I'd say thermostat as above

Title: Re: tempreture problems
Post by: andc1 on 01 September 2009, 10:56

Yea gradually goes down then back up again

Title: Re: tempreture problems
Post by: rubjonny on 01 September 2009, 11:28

ok cool, id say tis the stat then as above :)

clicky for coolant testing how2: http://www.golfgtiforum.co.uk/index.php?topic=106380.0