thermostat stuck open or not there?
07-05-2010, 04:30 PM
#1
thermostat stuck open or not there? what would cause a temp guage to read 100 degrees consistantly? either the fan is on the whole time, is the thermostat stuck open or is it possible its not there? the car is a 1987 camaro Z28 with a 305 H.O. 4bbl
Last edited by King Nothing; 07-05-2010 at 04:37 PM.
07-05-2010, 04:45 PM
#2
Bad temp sensor.
If you want to know if there's a t-stat in there....simply take the radiator cap off when the engine is cold. Start the engine. If the coolant immediately starts moving inside the radiator...there's no t-stat in there (or its stuck full open). It takes a good 5-10 minutes to warm up enough for the t-stat to open and start allowing any coolant to move.
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If you want to know if there's a t-stat in there....simply take the radiator cap off when the engine is cold. Start the engine. If the coolant immediately starts moving inside the radiator...there's no t-stat in there (or its stuck full open). It takes a good 5-10 minutes to warm up enough for the t-stat to open and start allowing any coolant to move.
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07-05-2010, 04:48 PM
#3
Bad temp sensor.
If you want to know if there's a t-stat in there....simply take the radiator cap off when the engine is cold. Start the engine. If the coolant immediately starts moving inside the radiator...there's no t-stat in there (or its stuck full open). It takes a good 5-10 minutes to warm up enough for the t-stat to open and start allowing any coolant to move.
.
If you want to know if there's a t-stat in there....simply take the radiator cap off when the engine is cold. Start the engine. If the coolant immediately starts moving inside the radiator...there's no t-stat in there (or its stuck full open). It takes a good 5-10 minutes to warm up enough for the t-stat to open and start allowing any coolant to move.
.
07-05-2010, 06:30 PM
#4
Could have a seriously blown head gasket. Because the water pump can't move coolant that fast where its going to shoot out all over the place. It just moves through casually.
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07-06-2010, 01:06 AM
#5
Shooting out all over the place???? When it was dead cold? You mean shooting out of the radiator fill neck?
Could have a seriously blown head gasket. Because the water pump can't move coolant that fast where its going to shoot out all over the place. It just moves through casually.
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Could have a seriously blown head gasket. Because the water pump can't move coolant that fast where its going to shoot out all over the place. It just moves through casually.
.
07-06-2010, 12:31 PM
#8
sorry i meant when the car was off after i drove it for 10 minutes. i waited 40 minutes after and while the car was off i took the cap off and watched the fluid shoot from the drivers side of the radiator to the passenger side. i picked up a new t-stat today and some new coolant with new plugs and wires and a fuel filter. tomorrow i'll be draining the coolant in the morning and hopefully change the plugs and wires right after
The coolant blew out simply because it was under pressure.
Start the engine when its dead cold with the radiator cap off.......see if the coolant starts flowing immediately. If it DOES NOT flow immediately, then starts to flow about 5-10 minutes later after its warmed up and the t-stat opens. The t-stat is in there and its working fine.
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Last edited by LS6427; 07-06-2010 at 01:51 PM.
07-06-2010, 03:23 PM
#9
well i put the new t stat in with 2 new sensors on the housing and new coolant. the old t stat was rusted as **** and the gasket wasn't there anymore lol engine still stay at 100 degrees 
even after idling in my driveway for 5 minutes i'm not sure what to look for now
even after idling in my driveway for 5 minutes i'm not sure what to look for now
07-07-2010, 03:55 AM
#10
update: well on the drive to work i noticed the temp gauge going up and holding at approx 170. tonight i let it get higher than that while sitting in a parking lot to see if the fan would come on but i finally shut it off close to 200 and i checked under the hood right before and the fan never came on i'll be testing that out tomorrow
i'll be testing that out tomorrow 