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Old 04-06-2007, 12:30 AM   #1
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hey y'all! when i changed out my LIM, i put in a drilled 180* t-stat. flushed it using the prestone flush tee(on my upper "inlet" hose) till it was clear(as clear as it would get). filled the radiator and overflow with the yeller prestone and water. ran the motor and heater for a while, opened the bleed screw. repeated that for a couple days(just the running and bleeding part). the car is still running close to 200 degrees(MAYBE a "tick" under), even in 34 degree weather. the coolant is full, could there still be air pockets in the system? also, does anybody take that stupid plastic panel off underneath the radiator? it seems that is just blocking some air from the radiator.
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Old 04-06-2007, 08:11 AM   #2
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When you vented, were you getting a solid stream of coolant out? I'm assuming yes. Engine temperature just under 200 degrees is not abnormal. Haven't heard of anyone removing the spray shield under the radiator.
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Old 04-06-2007, 11:37 AM   #3
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The temperature gauge is a rough estimate of the actual temperature. Some see a slightly lower temperature on the gauge with a 180*, and some don't.
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Old 04-06-2007, 11:59 AM   #4
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the gauge is not completely accurate. you really have to measure with a scantool to get an accurate reading

and with my 180*, it runs just below 200 on the gauge too; this seems to be very normal
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Old 04-06-2007, 12:08 PM   #5
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mine runs a tick under 200 with my 180
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Old 04-06-2007, 11:38 PM   #6
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okay, wasnt sure. with my fireturd, when i put in a 160 degree, it ran at around 170-177 degrees. thanks for the responses.
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Old 04-07-2007, 01:15 AM   #7
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i didnt realize that was going to be the case, good thing to remember when i put mine in this weekend.
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Old 04-07-2007, 01:21 PM   #8
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A good thing to remember is that the temperature rating of the thermostat is the point at which it begins to open. As the coolant temperature rises above the rating, the thermostat will continue to open further in an attempt to hold the coolant at the rated temperature. At the point where it is fully open, it has done all it can do and if the engine generates more heat than the cooling system is taking away, the coolant temperature will continue to rise.
It will eventually settle out when an equilibrium point is reached where heat generated equals heat removed. That point depends on the condition of the cooling system, outside temperature, speed of the air moving over the radiator and the amount of load on the engine and probably a few other lesser things.
I got this from another forum just after I wrote this and it probably says it better. "Using a 160* t-stat will only allow the engine to run at 160* in cold weather- the rest of the cooling system will determine what temperature the engine will run at the rest of the time (as the t-stat will always be open)- which in warm weather won't be anywhere near 160* unless you have a radiator 6 feet wide, 3 feet high and 8" thick (well maybe I'm exaggerating that a bit- but you get the idea). A t-stat only determines the engines MINIMUM operating temperature- NOT its maximum."
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