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1985 chevy runs rough when hot outside and runs hot,took thermostat out and has new radiator , new timing chain new oil pump , can't figure out why it's running rough , it's a 350 engine ran great for about 200 miles also had heater hose leaking and replaced it also

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Water pump cud be failin--plugs wire probly hav inside wear as well as distributer-inspect--du a scan of vehicle for any codes

Posted on Oct 11, 2010


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My 2003 dodge intrepid depleted fluid and I was told it was a sparkplug. I have new radiator and resivor. It was running hot.

It definitely was not a sparkplug. It is either the water pump, thermostat or clogged heater core.

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Why is my honda passport running hot?

The most common cause other than what you have replaced is a leaking head gasket.
Could also be a coolant flow problem inside the engine, or air flow thru the radiator.

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1985 Sentra, car is getting hot...changed thermostat, water pump, radiator cap...HELP car is still getting hot!

Check the dipstick and underside of oil filler cap for signs of oil/coolant mixture(chocolate milk).If so, bad news, you have signs of a blown head gasket. Also make sure your radiator isn't plugged. You can check this by running your hand along the surface of the radiator when warm, with the engine off of course. You should not feel any cold spots. I'm assuming your cooling fan(s) are working.

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I have a 2001 Mitsubishi Galant, it was overheating in july so I took the thermostat off and was able to make it home only to find out I needed to replace the radiator. so I replaced the radiator, but...

A rough check of the water pump is to pinch off the upper radiator hose with your hand while the engine is running, squeeze it as tight as you can, then release. If pump is working you should feel a surge of coolant as you release the hose.
So the fans do come on by themselves? If the coolant got hot enough when stopped, they should have come on.
You may want to have the cooling system pressure checked to see if it holds pressure.

Aug 27, 2013 | 2001 Mitsubishi Galant

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Engine overheat and no heat

Maybe your radiator is clogged.

Mar 12, 2017 | 2001 Nissan Sentra

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Runs good when cool outside but runs rough when weather warms and gets hot ,its a 350 chevy motor

check the fins in the rad...i had a van & the fins rotted away...caused her to run hot

Oct 10, 2010 | 1985 Chevrolet Chevy

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What is the wiring order for a chevy 5.0 1985

1 8 4 3 6 5 7 2 . It should also be stampedon the intake.

Sep 03, 2009 | 1985 Chevrolet Chevy

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1985 Ford Crown Vic engine when hot outside last 2 years would take time to start as I waited to re-try until it did. Lately has to have a jump and starts right away. Shop replaced: battery, serpentine...

It sounds like you have the wrong thermostat installed in your car. You need to get the water to the block quicker then what it's doing now. Always check oil every time before driving. This is a must on older cars. Some Mechanics differ, but in the long run it will pay off. An oil spot beneith the car might be bolts that need to be tighten on the oil pan, of you may have a bad oil sending unit. Also ehck power steering pump fluid level and make sure there is not a leak there.

Aug 13, 2009 | 1985 Ford Crown Victoria

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1994 Chevy Silverado temperature guage shows hot

Flushing the radiator, replacing the radiator cap, adding new coolant, replacing the sensors and a new thermostat solved the problem. Probably didn't need to do all of these things - but since we just purchased the truck, and given the fact that is probably hadn't been done in a while, we chose to do all of these things (which really didn't cost a whole lot), it's running like a charm now.

Jun 02, 2009 | 1994 Chevrolet Silverado 2500

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Overheating engine

Was the thermostat put in backwards? I know this is a silly question, but I've seen it happen. The water pump will fight it if it is. Another thing are the coolant passages, are they flushed out? Also, if that fan clutch is the original one, I would go ahead and replace that as insurance against the water pump breaking.

Dec 26, 2008 | 1985 Mitsubishi Mighty Max

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