I will have to check my maintenance book but probably had about 300 hours on
the engine since doing last valve job. Installed new TRW exhaust valves when
ever I pulled the heads. If I do a rebuild I will use the Manley SS exhaust
valves; shied away in the past thinking that they would be softer and more apt
to burn??? Yes it was cylinder #3. I used modified VW Type 1 cooling tin with
air inlets from the front of the cowl, always kept head temps under control:
less than 300 degrees F, sensors under the rearmost upper head bolts on each
side. Oil temps were a problem with this arrangement. Solution was an
additional 5 by 11 plate style oil ducted cooler under the engine; full flow
through an oil filter into the oil cooler then into the front oil galley. Oil
temps running 180-190 in cruise, never over 200 F.
