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Model specific boards => Golf mk2 => Topic started by: sprout99 on 17 March 2010, 13:09

Title: Engine temp and thermostat
Post by: sprout99 on 17 March 2010, 13:09
where is the thermostat on the KR engine?

If it was stuck would it cause engine to overheat in traffic very quick?
My car seems to get very hot very quik when in traffic. If moving it's fine and temp gauge
is central.

any advice

Thanks
Ian
Title: Re: Engine temp and thermostat
Post by: dragonfly on 17 March 2010, 13:53
Does the fan come on? If the thermostat is stuck then yes it will cause the car to overheat.
Title: Re: Engine temp and thermostat
Post by: jezza16v on 17 March 2010, 13:54
More likely that the rad fan isn't kicking in. Could be the fan has packed up or the thermo switch in the bottom of the radiator has failed. The fan should turn on when the gauge is between half and three quarters (ish). You can jump the fan directly off the battery to check its working, if it is then its probably the thermo switch that needs replacing.
Title: Re: Engine temp and thermostat
Post by: sprout99 on 17 March 2010, 14:06
fan was kicking in - i'll check it out not heard it for while
thermostat is £8 so worth changing

where is it though - side of block below dizzy?
Title: Re: Engine temp and thermostat
Post by: rubjonny on 17 March 2010, 14:55
have a read of the coolant system faq, takes you thru how to test each part of the cooling system :)
Title: Re: Engine temp and thermostat
Post by: jezza16v on 17 March 2010, 15:24
The thermostat is way down below the alternator under a plastic housing held on with two small bolts, under the PAS pump bracket (if you have PAS), follow the bottom hose out of the radiator and its at the end of that. Make sure you get a new O ring seal with it, use only oem parts for this important item.
If your thermostat was the problem it would tend to run hot or cold all the time. The temperature is supposed to rise a bit when you're not moving, so long as the fan cuts in and brings it down again that's quite normal. Not sure if the 16v has a 2 speed fan, it could be that the high speed is not working, but I wouldn't expect it to be needed this time of year.
Title: Re: Engine temp and thermostat
Post by: sprout99 on 17 March 2010, 21:07
replaced stat and refilled coolant.

engine up to temp and .................

it's the fooking fan switch.
Title: Re: Engine temp and thermostat
Post by: jezza16v on 17 March 2010, 21:16
I hate to say........'I told you so!'..... :rolleyes:
Title: Re: Engine temp and thermostat
Post by: midz16v on 17 March 2010, 21:40
replaced stat and refilled coolant.

engine up to temp and .................

it's the fooking fan switch.
Ive just changed my radiator the old one has still got a working 2 pin fan switch on it,its yours if u want it.
Title: Re: Engine temp and thermostat
Post by: sprout99 on 18 March 2010, 07:54
replaced stat and refilled coolant.

engine up to temp and .................

it's the fooking fan switch.
Ive just changed my radiator the old one has still got a working 2 pin fan switch on it,its yours if u want it.

where you at? I really need car mobile - it's getting machine polished friday
Title: Re: Engine temp and thermostat
Post by: sprout99 on 18 March 2010, 07:55
I hate to say........'I told you so!'..... :rolleyes:


:tongue:

yeah i know................. but at least i know stat is ok now

 :wink:
Title: Re: Engine temp and thermostat
Post by: sprout99 on 18 March 2010, 07:56
forgot to mention....what a pain to get at !!
Title: Re: Engine temp and thermostat
Post by: midz16v on 18 March 2010, 09:35
replaced stat and refilled coolant.

engine up to temp and .................

it's the fooking fan switch.
Ive just changed my radiator the old one has still got a working 2 pin fan switch on it,its yours if u want it.

where you at? I really need car mobile - it's getting machine polished friday
fife,scotland mate if u pm me ur address b4 the p/o closes ill get it sent s/deliv would be with u by 12 friday
i
Title: Re: Engine temp and thermostat
Post by: sprout99 on 18 March 2010, 13:12
thanks i'll bear it in mind
i'm hopefully getting one today. If not i'll let you know

 :smiley:
Title: Re: Engine temp and thermostat
Post by: sprout99 on 19 March 2010, 12:22
sorted ........

 :cool:

Title: Re: Engine temp and thermostat
Post by: sprout99 on 22 March 2010, 08:11
fixed the cooling prob................. but the system coolant level / pressure/ over temp light kept flashing
when fan licks in and goes off when temp is settled back to centre and fan is off.

I had noticed the coolant level did change .......this should not happen.

while pondering in garage with bonnet up i could hear a hissing coming from expansion bottle.
I noticed tghe seal on bottle had gone.

What would that do?? I've replaced it but not been out in car to try it out.

Thanks
Ian