Temp guage says hot but engine seems OK

EFRAIN108

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CHEVROLET

1992 Chevy Suburban (350, 2 wheel drive, auto) with 135000 miles. Cooling system sprung a leak. I replaced the thermostat housing, gasket, new theremostat, new radiator cap. I flushed system, added new 50% coolant. I replaced temp sending unit. Temp guage fluctuates. Goes up high, but I check the engine and it does not feel hot. No steam. I can actually put my hand on intake manifold. Top hose is hot but normal. Could it be the water pump or radiator? This wasn't doing this before springing a leak and my doing all this work.

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BUELLXB9RFB

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50 POSTS

Replace the engine temp sensor. Should fix your proble. Located on the block. Alot of time when they spring a leak if not shut down soon enough it can mess up the engin temp sensor

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Monday, November 6th, 2006 AT 6:26 PM

EFRAIN108

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Thanks. I replaced the sensor (the last thing I did) but problem persists.

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Tuesday, November 7th, 2006 AT 10:04 AM

BUELLXB9RFB

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Try undoing your battery for 30 sec. Sometimes the gauges can get stuck.

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Tuesday, November 7th, 2006 AT 9:19 PM

EFRAIN108

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I haven't tested with a voltmeter. I can do that. The guage starts normal, then goes to hot, stays there a while, then comes back to normal for a while, then hot again, etc. I've noticed that if I stop and turn the engine off when the guage is very hot, then turn it back on, the guage goes back to normal. I have also noticed smoke when accelerating after being stopped at a light.

I'll also try disconnecting the battery. Heck, I'll even dance around the truck a few times if it'll help. (Jk) Thanks.

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Wednesday, November 8th, 2006 AT 1:47 PM

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