"Tom" wrote in message ...
I cannot seem to control the high CHTs on my 1958 C175 with a Continental
GO300 engine. The CHT probes are on the two rear cylinders run about 450F
degrees on left and 400F on right on takeoff with 100 mph climb out and 400F
left and 375F right at cruise.

This differential still looks like a problem with the baffles. It doesn't take much of
a hole to really mess up the cooling (been there, done that). But you say you have
new cyl's. What's the oil consumption like (and what oil are you using now)?