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Rear engine cooling
Having cooling problems on my 1973 P-337-G, rear engine. New engine put in Jan 2002. CB engine with Riley air-condtioning and inter coolers added[ Riley] Ran mineral oil for 20 hours, oil burn good so went to 50 weight, at 20 hours. Always had high Cht on Right side, # 2, 4, 6, Now at 35 hours and out side air temps higher can not keep CHT below 400 on 2, 4, 6. At crise #2=400 f # 4 414 f and #6 450 f. I climb at 155 to keep # 6 below 450, but recently 455-460 on climb. Open or close cowl flaps no change, maybe 1-2 degrees. Oil temp running 210 degrees. at cruise. Run fuel high for cooling 30 " M.P. 2400 RPM and 14 GPH Left side #1 = 325 ,#3= 350 # 5 = 380. I asked Riley to make sure baffling was perfect. My mechanic says looks O.K. Back baffling curling forward, almost in half, Mechanic says probably is forced back, inflight. Looks to me like could be forced down and open up gap. When decending # 6 goes from 450 to 420 in about 5 minutes. When power pulled back and decending # 6 goes below 400. Any thoughts? By the way my air-conditioning not working, no manuals or trouble shooting guides from Riley, anyone know who can work on Air in Northern Calif.???
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