Mine is same age, but only has 306500km on it. I'm still about to figure out whether the engine is healthy. Waiting for a compression test device to become available to me, and closely monitoring oil-level and -condition.Well, Today I removed the head off the engine, a 1985 3B in a BJ70.
Head gasket had let go on number 2 pot.
It only had 800,000klm on it so time for a rebuild.
Got plenty of repair manuals, just looking for parts manuals / information now.
The last B engine I rebuilt was in about 1990 ish, maybe 89. I have heard I can install steel top pistons so I can put a turbo on when I finish the build with less worry.
No issue with coolant, but have the impression my oil gets diluted by diesel.
Will you do a rebuild thread?
Cheers Felde