i ran a compression test on my b18a1 and they where all 175-180. so i geuss the rings are good. i put a brand new head on it. port polished valves springs retainers. the works. and every once ina while itll sit there and smoke. its white smoke. only running 4psi of boost. all the gaskets are brand new? i was told my valve seals might not of set yet but ive already put a good 300-400 miles on it since the head swap? and ideas. it also smokes during boost which i was told i might wanna get a turbo rebuild kit.

 

wheres it smoking from?

 

the exhaust

 

Do a leak down test, and a wet compression test.

 

also; if ti is worth a gasket, see if there is more of a buildup on the manifold vs. the downpipe. This could help you narrow it down a little. I have seen a motor that runs clean, the guy thought he blew his rings, it turns out the hot-side seal went out... like 800 miles on the turbo.