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post #1 of (permalink) Old 01-05-2001, 09:28 PM
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overheating temp guage

First the problem, engine temp gradually gets to hot after 10 or so miles of interstate speed but cools down immediatly at stop sign. First guess is a stopped up radiator then, a faulty thermostat (only partially opening) then, bad waterpump, then slipping belts, then engine timing. Finally after all else failed I removed the thermostat altogether. Guage read cold and did not climb but heater didn't work either. When I pressed clutch pedal just enough to touch throw out bearing I noticed the lights would get a little brighter. Duh! I had a marginal ground that would feed through the temp. sending unit. The higher the sending unit signal, the better the ground through it and the higher it would read. Installed braided ground strap from motor mount bolt to frame. PROBLEM SOLVED!!!! I now have a freshly cleaned radiator, a new thermostat, a new water pump, a new timing belt and idler, and new fan belts. I'm supposed to be a mechanic, and old one at that. I hope this helps some other poor soul. I coulda checked my grounds with some jumper cables.

88 Sam 4.16t/c lockrite rear 225-75's on stock wheels and suspension.
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post #2 of (permalink) Old 01-05-2001, 11:29 PM
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Re: overheating temp guage

papa: Thanks for the advice. I have been looking for a braided ground strap without success. Where did you get your?

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post #3 of (permalink) Old 01-05-2001, 11:35 PM
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Re: overheating temp guage

had and old braided flat battery cable layin around the shop. had one end with a hole made in it and a battery clamp on the other. cut off clamp, folded end over and run a punch through the braid 'til a 3/8 bolt would go through. used a flat washer to protect the flat braid.

88 Sam 4.16t/c,lockrite rear,225-75's on stock wheels, 4.5 spoa
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