Why would they do this. The fact that 1000 s of them have been done and the only documentation of failures due to coating are wife s tales.
Harley davidson powder coats all their motor parts cylinders and heads.
Powder coating harley cylinder heads. Poor chrome peeling pitted must be stripped prior to powder coating. Process video of how we powder coat harley davidson cylinders and heads. On the jugs get them off cleaned thoroughly powder coated baked and then honed.
The engines come in 121 127 139 and 147 cubic inch displacements. Jake hubacz powder coating is in north brookfield massachusetts. When the harley davidson evos came out in the mid 80 s people were alarmed at 210 deg f oil temperatures they shouldn t have been because that s where they ran best.
Aircraft stripper removes powder or i use an industrial strength liquid methylene chloride that strips the part bare in 10 minutes with no effect to the substrate at all. Our blends of polyester powders let your motor breathe letting you customize your head and cylinders. The other is whether someone else did it or not making it a reasonable justification is true.
R r billet 131 hyperformance now offers these all billet r r complete engines. If you are doing powder coat it will definitely work better if you strip the top end have the heads stripped valves removed for grinding and then powder coat and bake the heads. We can also powder over chrome if the surface is good.
Harley has been powder coating their heads cylinders engine cases and frames for years now and no one ever complains about heat issues. And while exhausts get too hot to coat exhaust shields can be coated on the exterior side with great results. They feature the new r r billet engine cases billet aluminum cylinders and their famous billet cylinder heads with billet rocker boxes.
I called harley technical and the gentleman said he also asked about this a few years ago and the. I just recieved a set of screamin eagle performance cylinder heads p n 16952 99c and i was amazed when i saw that the combustion chamber bowl actually is powder coated. Xtreme has heat barrier and heat dispersant coatings for exhausts cylinders cylinder heads and engine cases that cool down things to an acceptable level.
December 21 2020 at 3 17 pm harley davidson fxr cylinders and heads vapor blasted and coated in matt black.