Cooling system bubble?

[QB93Z]

Originally Posted by VetteMed

When I drove the car home after buying it, the temp gauge was in the lower 1/2 the whole time (can't recall exactly where it sat), but it didn't jump out at me as being a problem.

Today it was definitely indicating much higher than before I touched it.

Before the next time you drive, and when the engine is cold, check the level in the expansion tank and the overflow bottle. If you had an air bubble from the fill after the flush, that water can be added now.

Also I agree with Tom. My experience is that two of my ZR-1's will heat up way above "normal" when driving at a steady cruise speed at about 1600 rpm. For example 55 mph in 6th gear. Shifting down to 5th gear (2000 rpm) and the temperature drops rapidly back down to normal. Both these cars have brand new radiators.

Jim

Jim