have a question cant seem to find in the tech articles

[bigoilburner20]

ok I am looking at different diesel trucks and wanting to know.How do you check for blow by? how would you know if a turbo is bad or is really worn out?and what colors as far as exhaust what should I be looking for?

 

[rhkcommander]

Exhaust will be:
Clear-fine
Gray-cold engine
Black-too much fuel and/or not enough air. Some black after flooring is ok
Blue-oil consumption, rings, blowby, leaky turbo, etc.. Oil

Shaft play is how you check a turbo. And inspect the impeller and housing. If chunks are missing walk away. If the shaft easily wobbles or moves in/out or side to side it will need rebuilt. Does it spin freely? Its good to give it a little oil. Dry turbos will have some slight play.

Blowby - pop the oil cap off when running - lots of "smoke"= blowby. Or yank the hose off of the cdr. Same result

 

[typ4]

if the turbo is dead or suspect ,negotiate a lower price and send it to me for a rebuild.

 

[riotwarrior]

if the turbo is dead or suspect ,negotiate a lower price and send it to me for a rebuild.

Very true!

 

[bigoilburner20]

ok thanks guys looking at an 03 or a 96