During a long trip the temp gauge started to fluctuate often nearing the red zone. It seemed to register lower temps going uphill and higher going downhill. We stopped, checked for coolant leaks and signs of overheating but the engine did not seem hot and the radiator was not boiling and there were no leaks. When we turned the engine back on the gauge would go back to normal then gradually move up to the 240 range. At he very end of the trip in our driveway the check gauges light came on but was off when I restarted the engine. Any ideas
Be sure the fan belt is not slipping and if it is tight then you might want to change the temp. sw. also check the wire to the temp sw. and make sure it is not shorting out on the engine. In addition, the gauge maybe miss reading but it don't sound likely from your post.
SOURCE: 97 chevy pickup running temp
That's not really that unusual of a temp. 195-210 is a normal range. If you'd like, you may try installing a 195 degree t'stat. As well, make sure your cooling system, (radiator, heater hoses, and water passages in the block) are in good order. If this engine previously used the "orange" GM coolant, they were bad to clog up hoses and passages. I had to take all my hoses off, as well as water pump and thermostat and run pressure hose through all the orifices to get the gunk out.
SOURCE: antifreeze ts boiling back into reservoir.
it sounds like a possible head gasket problem,you can get the fluctuation from combustion gases getting pumped into your cooling system and creating gas pockets,i would suggest taking it to a shop and have them do a block test to look for combustion in the cooling system to confirm the problem,that way you will know for sure,if it comes up negative they can also perform a flow test to make sure there is no restriction in the cooling system such as a plugged radiator or a bad thermostat,hope this sheds a little light on it
Testimonial: "I bet you've hit on the problem ! Car has been "using " antifreeze for a couple years now, with no leaking anywhere. Lost through the head gasket ?"
SOURCE: 1995 Chevy K1500 Z71,Engine L05 5.7L,starts cold
I know it sounds simple minded but change your fuel pump relay on the firewall it is going out.(cost me $150 bucks for a $8 relay)
SOURCE: water pump went out, it was replaced along with
Good chance you have a cracked head or at least a blown head gasket.There's a chance you have your timing way too advanced,but someone would have to of changed the timing,it doesn't just happen.
If you feel up to it remove the heads and get them checked for cracks.Look over the head gaskets first,there's probably one blown out.Either way,take the heads in for a check.They can look at the head gaskets and help you to diagnose what caused the overheating too.
SOURCE: turn the key and the battery drains down to not
sounds like your starter is dragging when hot. check cables for corrosion. have you had starter draw done with it on car and ehgine hot?
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