Good evening,

I have been taking datalogs of my car driving around. I shut down the engine to check some stuff for a few minutes, turn the car on and start logs right away. Once I do this, I notice that the water temps are up to 220-230 degrees F. However, once the engine is running for a about 20-30 seconds, temps drop back to normal.

I have even let the car idle for 5-10 minutes before shutdown, and the same thing happens.

Is this all normal?


Side note: When the car is running/driving around town and I'm datalogging I have never seen temps above 195-197 degrees.

 

it's normal.

just because coolant temps are 200'ish doesn't mean the cylinder walls and areas of the head are. they're naturally going to be much higher. when the water stops flowing it allows the time for the water and metal to equalize in temperature. water heats up as the metal cools down, the 230 your seeing is the middle where they meet.

 

Thank for the input. Much appreciated.