RogerC 136 Report post Posted October 3, 2021 I have an Offenhauser intake for my 351C. I painted the top side with ford blue ceramic engine paint from Eastwood a while back. I was moving some of my parts around and got to thinking. What I was wondering, is there any benefit to coating or painting the bottom side to possibly insulate or otherwise help keep heat transfer to the intake charge minimized? Stock 351C had a sheet metal pan intake gasket but that won't be used in this case and the heat transfer ports are welded shut. Not a big deal, just curious if anyone else has thought about this. Quote Share this post Link to post Share on other sites
jmlay 80 Report post Posted October 3, 2021 Perhaps if it is a thermal coating. However I would be concerned with whatever that coating flaking over time. Especially if the intake has seen use previously as it would be very difficult to extract all of the oil from the surface before coating. Or I'm just a worrysome person... Quote Share this post Link to post Share on other sites
RogerC 136 Report post Posted October 3, 2021 The intake was previously painted with standard engine enamel. I took it to a machine shop to have it stripped, cleaned and inspected so it was down to bare aluminum when I painted it. Flaking over time would be a concern. What is normally used by those who've painted the lifter valley? Is that even still done? Quote Share this post Link to post Share on other sites
