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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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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 7MGTE overheating problem fixed
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Thu, 05 May 2005 14:12
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Hello all,
Thought I might reply to this thread instead of starting another one since there is a slight relevance.
Over the last week or 2, my viscous fan has been kinda 'delayed' in its operation i.e. not engaging properly until ocassionally a couple of minutes after the temp has crept up 1 bar above centre.
Just today, right when I got to my gf's house, the fan engaged and stayed that way for a while 'till I switched the engine off. Thought nothing of it 'coz I was on the freeway for about 30km's before I got to her house. Left her house later, clutch fan engaged as I started the car and disengaged as per usual. Started driving... about 5 minutes later, the lil' sucker engaged and wouldn't disengage. Literally the whole 55-60 odd km's home I was driving with the fan engaged 80-100%. I say that cause I could hear the tone of the fan changing even when I am holding the revs.
Now, can I assume that the fan's had it? Time to get a new one? Or is there something I can do to fix it (bash it with a mallet or something?).
Thanks
Yian
P.S. For people who don't know, this is another 7MGTE MA61.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 7MGTE overheating problem fixed
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Thu, 05 May 2005 18:30
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Yian,
I got a 7M-GTE Viscous Fan thingy sitting at home if you want to swap, also 2x 5M-E ones if you really want to try 
Looks like you need to get new ones or go thermos like me 
Cheers.
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