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Old 21 Sep 2009, 07:22 PM   #1 (permalink)
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overheating!!!

hi ive just bought an s reg wrx import two weeks ago, its been running great and ive drove it very carefully, warming up cooling down etc,
now for some strange reason the car goes straight into the red on the water temp. the fan kicks in and the radiator relief valve does lift up, does this sound like head gasket? the oil seems fine and the car isnt losing water or smoking white. any ideas/common faults guys/girls? was thinking just the thermostat but there wouldnt be excess pressuer in the radiator would there? any help would be great...
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Old 22 Sep 2009, 05:09 PM   #2 (permalink)
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Re: overheating!!!

http://www.frost.co.uk/item_Detail.a...ng&subCatID=31 If you can pick this up be great it will give you an accurate reading you put it on top of the radiator tank take cap off have car warmed up but take cap off SLOWLY while holding FIRMLY to release pressure as you will get SCALDED if you dont, use rags to soak some coolant as it will overflow when you open it and dont forget to top it back up when car cools down, HOT coolant will gush out so WATCH it then this device sits on top of rad cap hole and if they Hydrocarbons which is caused by an internal leak of head gasket when the coolant comes in contact with exhaust gases it will then turn the blue liquid yellow in this device and that means blown head gasket but best bit would be to see the thermostat and test it take it out then put it into boiling hot water it should open if it dont its the thermostat and save a nice bill by suspecting the head gasket best of luck let us know how you get on with it HEAD GASKET BLOWN SYMPTOMS
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Last edited by stiimpreza1984; 22 Sep 2009 at 05:32 PM.
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Old 22 Sep 2009, 09:19 PM   #3 (permalink)
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Re: overheating!!!

are the heaters getting hot? could be an air lock in the system. i had a similar prob, took best part of a day to sort. also poss knackerd themostat?
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Old 27 Sep 2009, 06:29 AM   #4 (permalink)
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Re: overheating!!!

heres what happens,
heating blows hot then cold,
car overheats when i really give it some
water comes out of resovoir constantly when its warm,
its defiantly not the head gasket(ive done all checks)
only other things i can think of are,
poor efficiency water pump
thermostat stuck shut
air lock,

can someone tell me were the thermostat is located?
also any easy/logical way of air bleeding engine,
and anyway of telling its my water pump?
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Old 27 Sep 2009, 09:53 AM   #5 (permalink)
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Re: overheating!!!

"airlock "

Undo the radiator type cap on the expansion tank. Then squeeze the rad top and bottom hoses aswell as smaller heater hoses etc-may see bubbles in the top as you do it thats good, once youre happy theres no more air you can get rid of try starting the car with the lid still off. (KEEP AN EYE ON IT) as it circulates. Put cap bk on after 5 or 10 mins and keep checking the coolant daily-though.



"thermostat test"

Put the thermostat in a pot of boiling water on the stove. As it heats up, its valve opens about an inch.




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Old 27 Sep 2009, 10:41 AM   #6 (permalink)
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Re: overheating!!!

thanks for your help, is the thermostat easy to get too?
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Old 27 Sep 2009, 10:49 AM   #7 (permalink)
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Re: overheating!!!

Quote:
Originally Posted by woodo View Post
thanks for your help, is the thermostat easy to get too?

Have a look under the car at the front R/H side behind the radiator.
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Old 27 Sep 2009, 04:47 PM   #8 (permalink)
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Re: overheating!!!

Quote:
Originally Posted by woodo View Post
thanks for your help, is the thermostat easy to get too?
Heres the waterpump as Pete said and arrowed red, the thermostat is under it as seen in pic
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Last edited by stiimpreza1984; 18 Oct 2009 at 09:00 PM.
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Old 27 Sep 2009, 08:05 PM   #9 (permalink)
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Re: overheating!!!

excellent, thanks guys,
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