In article nospam-97F34F.08333904092005@shawnews,
tony roberts wrote:

Hi
I have a newly rebuilt 0300-D.
It is running hot - at OAT 93F, 2 cylinders are exceeding 400F on
climbout and oil exceeds 200F.
[snip]
All suggestions highly appreciated.

recheck baffling

check oil temp probe for accuracy

check CHT probes for accuracy (all of them)

Is 400F a temp redline or isn't it 500F? For my Lycoming O-320,
the manual discusses having cruise CHT temps at or below 400F,
with 500F redline.

btw - EGT spreads aren't meaningful (the EI engine monitor
manual should have some discussion of this).

Have you talked to anyone at the shop that rebuilt the engine?

--
Bob Noel
no one likes an educated mule