slight blue smoke on startup, possibly turbo seals?

[Camostroke]

ok so recently did a powerstroke swap and motor sat out of donor vehicle for a few months prior to rebuild. Does anyone know if turbo seals will go bad after sitting for a few months with no use. The only reason why I ask is i can see some oil residue on the around the outlet of the compressor housing and some oil residue around the intake runners where they meet the heads causing me to think this would cause some slight smoke on startup. Any thoughts guys? thanks

[Nitro41]

first watch oil level and see if its dropping. on cold starts my truck throws out big thick clouds of white then turns blueish smoke for the first few minutes til the motor has some heat in it. its just unburnt fuel. i have brand new GP's and i tested the relay and wiring harness to be good.


this is back when my truck was stock. now i have mods in sig. smoke show hasnt changed.

YouTube - 7.3 powerstroke cold start

YouTube - 7.3 powerstroke cold start

[Camostroke]

Ya it only smokes on startup. As soon as the engine is warm it no longer smokes, and the oil level never drops. There might be a small miniscule leak on the back of the hpop though.

[vegestar]

I wouldn't worry about start-up smoke, most likely just unburnt fuel which comes out of diesel's in a blue-ish white color. If the turbo seals were bad the smoke would never stop and most likely get worse as rpm/load increases. Start-up oil burn is usually from worn valve guides and/or valve seals so like mentioned before just keep an eye on the oil level.

[Camostroke]

Alright, ya I can see that now with the turbo seals being a constant smoke. I keep a pretty good eye on the oil level and it doesn't drop. I had the head vacuum checked and looked at while doin the rebuild and they checked out good. I also had to spend the big bucks and throw new sticks in too, so I dont think there would be a problem there either.

[vegestar]

you know what's interesting, my truck doesn't smoke much at all during cold starts. Even when I start it on WVO. The temp here rarely reaches freezing, but when and if it does I've had no issues whatsoever. Good luck with you're new engine, I'm sure you will enjoy!

[Camostroke]

I love it so far, alot more giddyup than the old idi motor for sure and sounds quite a bit better too