Steve, At the National convention Maintenance Seminar in Prescott, Ariz.in 1994 here are some notes taken from Darryl Lessard, and the guys I call the Wright Brothers John Wright Senior and Junior. and a Factory Rep.
1.) The Continental engine has a design operational oil temperature of 190 Degrees F. 2.) The baffling configuration and integrity are extremely important. The under cowl area is divided into three distinct air pressure zones, High, Low and Ambient. 3.) The high pressure area at the top of the cylinders to the mid-cowl cross barrier, should be free of leafy material, bird nests, bugs, and oil/dirt buildup. The rubber cross-cowl seal should face forward at the top, and be stapled with an industrial staple to the side mounted cowl seal ends. this will prevent high pressure air from migrating to the ambient air area to the rear where the starter, generator, and mags are locatd. 4.) One quarter inch clearance is specified in the Ercoupe Maintenance Manual between the nose cowl and the carburetor induction assembly. For the longest time I just naturally assumed that this meant free space, but I have been informed otherwise, cowl seal should be used to seal up this area. 5.) The advertisements for the oil filter modification leave us with a temptation to believe that the engine will run much cooler with this particular modification, Not true sez Darryl, if we want to get some additional cooling we need to either get some air moving around the filter, or add some sort of mechanical heat sink to provide some more surface area to haul the heat away. 6.) Engine cooling on the Coupes depends a great deal on the condition of the under cowl scat tubing. Inspect the tubing to check for integrity, and good mechanical seals at both ends of the tube. 7.) In a word for word copy from the maintenance manual under "Engine Cooling," In many instances the engine is not receiving the proper cooling that the complete baffle system was intended to give. It has been found that the felts on the top and side cowls were missing or not coming into direct contact with the engine baffles. It is very important that these felt strips are in their proper place to block the air forcing the air down through the cylinder fins." Audean Woollard N6596Q
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