Quote Originally Posted by colt45 View Post
I think this is the most plausible explanation. leak from the ip shaft seal seeping through the o-ring going to the timing gear case, where it mixes with the oil used to lubricate the timing gears , down to the crankcase. You're good turbo, real good. Thanks.
This is possible with gear driven pumps. Is your ride an isuzu (or toyota B), which other diesels are using gear driven pumps.