markduffield
Member
I bought my RV used, a Super-8 with an IO-540 C4B5 that was modified from fuel injection to a carburetor. I post here for the O/IO-540 input.
My metal baffling on the bottom of the cylinders has a round, obviously-deliberately-made hole in the baffling between cylinders 2 and 4, right up next to the casing. It's about 1 1/4 inch diameter. There is not a similar hole on the other side between 1 and 3. It seems like an obvious problem in terms of cooling air not being forced over the cylinder fins, but before I seal it I would like to throw it out there for comment. Has anyone seen this? Is there some reason why it should be there? And my #2 cylinder is my hottest CHT. Pictures from top and bottom attached. Thanks for the help.
My metal baffling on the bottom of the cylinders has a round, obviously-deliberately-made hole in the baffling between cylinders 2 and 4, right up next to the casing. It's about 1 1/4 inch diameter. There is not a similar hole on the other side between 1 and 3. It seems like an obvious problem in terms of cooling air not being forced over the cylinder fins, but before I seal it I would like to throw it out there for comment. Has anyone seen this? Is there some reason why it should be there? And my #2 cylinder is my hottest CHT. Pictures from top and bottom attached. Thanks for the help.