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ahhhh overheating still...
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Old 05 Oct 2009, 09:11 AM   #1 (permalink)
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ahhhh overheating still...

hi, my 98 sti import keeps overheating, ive tried alsorts,
things that arent at fault are
headgasket(both checked and ok
thermostat (replaced)
not plugged

things i have noticed
radiator is stone cold when running (with or without thermostat in)
radiator cap lifts and dumps the coolant everywhere
fans kick in and stay on (which is obvious really!)
sounds like the water pump impeller is spinning on the shaft or worn (what do you guys think?)

also water pump is silent (no funny knocking or bearing sounds
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Old 05 Oct 2009, 10:40 AM   #2 (permalink)
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Re: ahhhh overheating still...

sounds like an airllock to me..
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Old 05 Oct 2009, 11:07 AM   #3 (permalink)
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Re: ahhhh overheating still...

and the other thing i forgot to mention is the heating is intermittent, sometimes hot and other times stone cold
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Old 05 Oct 2009, 11:22 AM   #4 (permalink)
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Re: ahhhh overheating still...

yup,thats an air lock!!..
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Old 05 Oct 2009, 11:29 AM   #5 (permalink)
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Re: ahhhh overheating still...

any good ideas on how to sort it?
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Old 05 Oct 2009, 11:32 AM   #6 (permalink)
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Re: ahhhh overheating still...

easy way is to drain the entire system...
when thats done,top up the header tank,crank engine,and keep toping up until the level is at the bottom of the hearder's neck,just remember to get the coolant mix right
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Old 05 Oct 2009, 11:47 AM   #7 (permalink)
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Re: ahhhh overheating still...

thanks, you reckon i could of caused it by toppong it up by the expansion tank?
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Old 05 Oct 2009, 11:48 AM   #8 (permalink)
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Re: ahhhh overheating still...

that can cause the problem..
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