overheating?

[fmtrxr1]

I have a 66 mustang with a 200 six cylinder. I had the radiator rodded, replaced the water pump, and installed a factory thermostat. When I turn off the engine the temprature jumps up to full hot. Is there anything else I can do to prevent this apparent overheating problem?

[rouge67]

Do you want to say that the temp indicator jumps hot ?
When you shut off the engine, the indicator jumps between normal and hot, after approximately 1 min. This is normal.
When you start again the engine the indicator must go down towards the operating temperature. If your engine overheat, maybe there is air in the coolant circuit. Watch if the water level is maintained. Is the radiator cap in conformity ?
Another thing: is your thermostat well adapted for your engine ?
Maybe must you replace the fan ?
(Sorry for my bad english...):(

[randalbin]

It is actually normal for the engine temp to rise after it is shut off. When the coolant stops flowing heat is trapped in the block and it takes a while to dissipate. All engines experience this...its just that we typically don't notice since gauges are usually powered off with the engine.

[kentorrey]

HEAT SOAKING, YOU CAN ONLY SEE IT WITH MECHANICAL GUAGES, IF ITS RUNNING NORMAL TEMPS WHILE THE ENGINE IS RUNNING YOU WILL BE OK