Opposite Overheating
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2310
Printed Date: November-23-2024 at 4:17am
Topic: Opposite Overheating
Posted By: firstsport
Subject: Opposite Overheating
Date Posted: August-23-2005 at 3:05am
I seem to have the opposite overheating problem from everybody else here. My 89.5 Sport Nautique only gets hot at idle. Up to about 185 depending on the mood it is in. Only a few hundred RPM above idle and it immediately returns to 160 which is the temp. it has run at for years until recently. The water circ, impeller, and stat are all new. As far as I know an impeller has never been shred and I have owned it since 96'. Help please it is driving me crazy. Eventhough 185 is not that hot. Something ain't right.
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B.reak
O.ut
A.nother
T.housand
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Replies:
Posted By: Tim D
Date Posted: August-25-2005 at 3:15pm
Try replacing the sending unit. You might be getting a false reading. A friend of mine did the same as yours, and the raw pump had about a third of its implellor blades missing.
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Tim D
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Posted By: Jim_In_Houston
Date Posted: August-25-2005 at 5:49pm
It's probably the raw water pump.
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Happy owner of a '66 and a '68 Mustang
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Posted By: mackwrench
Date Posted: August-25-2005 at 7:06pm
OK, I have to ask.... is the belt tight on the raw water pump? Otherwise, check the raw water pump housing for grooves inside.
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NO LONGER A MEMBER
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Posted By: firstsport
Date Posted: August-29-2005 at 9:53pm
Thanks for the responses. The impeller is in perfect condition. The belt is tight, of course. Could the whole pump have a problem? How likely is it that the problem is electrical as described by many people on this forum?
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B.reak
O.ut
A.nother
T.housand
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Posted By: Guests
Date Posted: August-30-2005 at 12:32pm
well the sending unit is $9, give it a try.
maybe check the lines and circulating pump for blockage. do you have a strainer?
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Posted By: JEFF KOSTIS
Date Posted: August-31-2005 at 1:07am
Sounds like you might have a slight leak on the intake side of the raw water pump. At idle, it will suck air. A little rpm and the pump will draw enough water to overcome the leak. Check the trans cooler and hoses. Its prob not the sender because it doesnt care what rpm the engine is at. It sounds like its working fine since it goes down when you go above idle.
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MUSTANG COUNTRY
http://www.correctcraftfan.com/diaries/details.asp?ID=1074 - 1974 Mustang 17
http://www.correctcraftfan.com/diaries/details.asp?ID=1093 - 1976 Mustang 17
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Posted By: Brewski*
Date Posted: September-06-2005 at 4:25pm
Check your strainer also. Mine had the seal pinched in one area and did the same thing. Took it off straightend out the o-ring replaced and it cools fine at idle.
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