[4ePikanini]

I was browsing through this thread - https://www.4x4community.co.za/forum/sh ... hp?t=72548

I was wondering with regards to this coating. If it creates a thermal layer it acts like a blanket and makes the transfer of heat from gas to manifold a lot slower but I'm sure at some stage the manifold will get to the same temperature as normally eventually. Then because of the coating it will retain the heat longer as well increasing the chances of oil coking in the turbo oil passages.

Unless (on the other hand) the transfer of heat is dissipated faster on the outside than what it can be absorbed on the inside????? - what would be the best coating options, in such a scenario? Coating inside or outside, vice versa, or both?

I'm sure Gerrit will have valid input on this.

[4ePikanini]

bump

[HBannink]

Never coat the inside of a turbo manifold in anything. You will have different expansion and contraction between materials and the little pieces that go through the turbo could well be the same as a 6" nail, at 200 000 + rpm anything even a grain of sand will damage the turbo. On the outside ...... a lot of folks will give you different reasons but on my calibra the only valid reason was cosmetic and that is rapidly fading and flaking off, I don't think a diesel burns quite as hot but in time it would probably also fade