Question about 1987 Chevrolet V20

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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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  • Chevrolet Master
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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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The most common cause other than what you have replaced is a leaking head gasket.
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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.
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check the fins in the rad...i had a van & the fins rotted away...caused her to run hot

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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.

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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.

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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.

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1985 chevy Blazer cranks up, runs rough, then


have you checked, cady, fuel tank, is it getting the right amount of gas and air? plugs and wires, go with general mantinence first then step up. i have a 85 s10 blazer that was a lemon off the lot but has over 300000 on it and it has the same prob i fix it tempurary by flipping the lid on the breather upside down so it gets more air

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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.

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