I have read and heard that it's not recommended to have freshly coated headers on a freshened up or rebuilt engine during initial start up...why is that????
Yea I have a friend of mine that has Jet-Hot coated headers...2 years and already rusting. No thanks, I think I'll try Nitroplate.During engine break in you usually run the engine from 1500 to 2500 rpm for close to a half hour, the egt's will usually exceed the rating of the coating, this will dull the coating and help it fail earlier. and if it's from Jet-Hot, it will eventually fail....
basically yes . i do ceramics at my shop for my own stuff , same chemical jet hot and others use . i do a cure on the headers around 600 degs in the oven and then put them on a broke in engine and no problems .Interesting. So 255digger odds are you need to "break in" the ceramic coating on a combination that is already established?
Boy you got that right! It's not the slightest bit pretty....but I just want to get the underhood temperature down a little bit. Right now the headers are just black and they are starting to get a little rust on them.....so I figure this winter when the engine is out will be a good time to get them coated and I was wondering about the break-in procedures.PUT THEM ON IT.....IT'S NOT A SHOW CAR....AND WHEN YA SPRAY EM....THEY WILL GLOSS OVER ANY WAYS....BETTER THAN RUSTY BLACK ONES!