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Thermostat location I have no heat when it is cold out for about 4 hours after running car

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Beneath the upper radiator hose on the engine.There is usually two bolts holding the thermostat housing on the engine.

Posted on Nov 30, 2013

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Posted on Jan 02, 2017

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SOURCE: 1974 CORVETTE 350 AUTO CAM

I think you are onto something. The thermostat in my opinion is too low causing the radiator to not cool enough before it is sent back into the motor. The block and the pistons are heating up causing it to run poorly. When was the last time you had your radiator flushed? ( I would have said that the headers are heating up the starter and this is causing the drain on the battery but you stated that once you get the car started it runs rough so i would have to rule the starter out.)

Posted on Jul 26, 2008

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SOURCE: fan works but no hot air

have you checked the coolant level on the rediator?if its low you wont get alot of heat

Posted on Jan 08, 2009

motor1258
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SOURCE: location of thermostat

Did you run the engine with rad cap off & heater (not defrost) on while topping up the coolant. If not, do it & let it run that way until your rad fan comes on & off about 3 times, then top rad up to a inch or 2 from top, and put cap back on, & check level in return bottle.

Posted on Jan 16, 2009

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SOURCE: over heating then cooling to much

overheating can be caused by defective radiator, core plugged or fins have come seperated from the fluid tubes or one of the radiator hoses have collapsed esp the bottom one when the water pump is sucking hard, normally has a spring inside to prevent this.. also caused by a rotted out head gasket and coolant is not circulating fully to the rear cylinder so is only cooling front cylinders.. can also be a defective water pump or thermostat itself. The air conditioner load may be excessive if you're using that... defective radiator pressure cap, should be 14 lbs or so... pressure too low or none?

Posted on Jun 02, 2009

BAMOUT
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SOURCE: Where is the thermostat located?

Follow the top raditor hose to motor. Sometimes it following bottom. But some of time its following the top.

Posted on Feb 11, 2012

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Location of thermostat


Did you run the engine with rad cap off & heater (not defrost) on while topping up the coolant. If not, do it & let it run that way until your rad fan comes on & off about 3 times, then top rad up to a inch or 2 from top, and put cap back on, & check level in return bottle.

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1974 CORVETTE 350 AUTO CAM ,HEADERS HIGHRISE INTAKE AFTERMARKET 4 BARREL CAR STARTS GREAT AND RUNS GOOD WHEN COLD DRIVE FOR A HOUR SHUT OFF AND ITS VERY HARD TO START ALL MOST RUN BATTERY DOWN HOLD TO THE...


I think you are onto something. The thermostat in my opinion is too low causing the radiator to not cool enough before it is sent back into the motor. The block and the pistons are heating up causing it to run poorly. When was the last time you had your radiator flushed? ( I would have said that the headers are heating up the starter and this is causing the drain on the battery but you stated that once you get the car started it runs rough so i would have to rule the starter out.)

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