Bad Thermostat or Normal

[FreeBeeTony]

I have noticed that sometimes if I hit the throttle to get on plane (maybe up to ~3600RPM) before the thermostat opens the temp will go up to ~180*.....then comes down to 160* and stays there.

BTW it's got a full FWC'd set-up.

 

[tpenfield]

Re: Bad Thermostat or Normal

Yes, that is the 'heat' coming out of the engine block . . . sort of all at once as the thermostat opens.

 

[pyrotek]

Re: Bad Thermostat or Normal

That's the same thing I"m getting (although different temp range - 160 to 130). Perhaps it's partially because our water is so cold - 50 degrees. I heard that thermostats stick sometimes, and I'm just replacing mine to be safe. I don't have enough experience yet to know if it is normal or not.

 

[Don S]

Re: Bad Thermostat or Normal

Sounds like the thermostat is sticking. It should open slowly as the temp rises in the engine. Not suddenly.