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Registered:
June 2003
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7MGTE overheating problem fixed
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Fri, 03 December 2004 02:03
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Just thought I'd post up my overheating woes and the resulting fix in case it helps anyone.
Symptoms:
I found 95% of the time my car was fine, however certain things caused the heat to creep up by one and sometimes 2 bars. Driving with the aircon and fan on full ball caused the heat to go up by 1 bar. If it was a reeally stinking hot day it would go up by 2 bars.
Idling for long periods in the sun (like in very bad traffic) on a really hot day would also cause the heat to occasionally creep up by 1 bar.
Extended periods of hard driving would cause the temp bar to creep up by one bar, but only sometimes, and usually only for a very brief period.
It seemed that, in the case of idling in heavy traffic, if I nudged the revs up to about 1500 rpm and held it there, the temp would go back down.
Solution:
My clutch fan was a dud. It's the big bastard cooling fan attached to the water pump. Apparently the centre in these suckers is made up of a silicon compound, which ages and becomes less effective. There is also a little heat-sensitive bimetallic strip in them which can die. End result is, the fan doesn't do its job properly. You can either pick up a replacement fan centre (about $70 new - davies craige) or you can get the centre re-filled with new silicon for about $50 (there's a place in castle hill that does it - and probably many, many others).
Hope this helps someone.
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