My car gets hot on the highway.

Jayhall

WHIP THE PISS OUT OF THEM
May 7, 2005
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Surrey BC
try the temp sending unit, and if not that the guage. when a temp guage grounds out, it will spike into red, i baught an autometer guage and it came with a new temp sending unit, mounted the guage infront of the stock guage and i havent had a problem since.
 

Sonex2000

New Member
Apr 3, 2005
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Got the hose. running fine. but.....if I'm driving then i stop the car. then turn it back on the needle will spike till i tun over the engine and let the coolant flow. I want to get the better fan so it could have a good cooldown.
 

Sonex2000

New Member
Apr 3, 2005
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how big of a fan can I put on the radiator. and where do i get a thermostat kit that kicks on the fan when the temp is right. I don't want to deal with a switch on the inside.
 

Xtreme

New Member
May 23, 2005
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Lebanon, OR
Well my fan clutch just went out and it is hard to know if they go out because the only thing that happens is your car overheats. So if you have a clutch fan, have someone grab your fan while you start it, and it they can hold onto it with the engine running or cranking, then the clutch in your fan is bad.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
Xtreme said:
Well my fan clutch just went out and it is hard to know if they go out because the only thing that happens is your car overheats. So if you have a clutch fan, have someone grab your fan while you start it, and it they can hold onto it with the engine running or cranking, then the clutch in your fan is bad.
THIS IS INSANE!

the potential for injury doing this is huge please don't anyone try this :nuts:
 

YoNkErS87t

streetside mechanic
Mar 31, 2005
311
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In the Garage
All you do to check the fan clutch is when the car is off spin the fan. If the fan spins freely and spins more than say 3 times its bad. The fan is suppose to have a little resistent when you spin it, its not suppose spin freely.
 

soup

fiend
Apr 4, 2005
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Vancouver
:thumbsdow That is not smrt at all.

This is really weird, you must be missing something very trivial. I know you said you replaced the fan clutch, but test it again. Next time you're out driving stop the car and try to spin it. If it spins without much resistance take it back (I think you said it was new). Also, squeeze your upper rad pipe, if it gets as hot as you say it does it should be hella stiff and hot obviously. Since you're not pissing coolant out your rad cap sounds fine. You might want to switch to a lower temperature thermostat, but I don't think this is your problem. I betcha it is your fan clutch.

Good luck.

Edit: To add to Yonker's post, more than once around is bad.
 

YoNkErS87t

streetside mechanic
Mar 31, 2005
311
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In the Garage
I realy didn't know the excact number of revolutions, so i just said three.
It sounded good because i was trying to picture how many times it spins in my head and i came up with that.
 

mrnickleye

Love My Daily Driver !
Jun 8, 2005
825
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Mojave Desert, Ca
There is a thermal bi-metal spring on the front of the clutch. When the radiator gets really hot, that spring moves and closes an orifice inside the clutch. Then the fan clutch should 'lock up'.

When I was in doubt of a fan clutch back when I was a tech at the Toyota dealer in the 80's, I would get the car good and warmed up, then slip a piece of cardboard in front of the a/c condenser (all of it). Leave the hood open. Then I'd sit in the car and hold it at 2000 rpm and watch the temp gage rise.

The clutch should lock up before it gets to the red zone. When it locks, you'll here a hellacious roar, cause it will be pulling a massive amount of air. Note the temp it comes on at, then let it idle and get out and remove the cardboard. Let it idle till it cools back down to normal. The clutch will release somewhere above 1/2 on the gage.

If it goes up to the edge of the red zone without locking, I'd replace the clutch. If the fan blade does not spin when engine is off, replace clutch. If the blade spins around more than 1-2 turns when engine off, replace clutch. approx $80