Blown ZD30 more info

[Burto]

Well have started the strip and inspection, looks like may have dodged a bullet.
All intake hoses, intercooler and swirl valve have liquid engine oil in them, not burnt oil but good ordinary engine oil, in fact a small quantity of oil ran out of the intercooler when inverted. Hmm Turbo ??
Turbo off, impellar elbow again contained liquid oil with evidence around the actual impellar the turbine also has oil sludge in exit of the "snail" and around the turbine.
When the turbo shaft is grasped at either end it can be rocked slightly not much but enough that it can be felt.
Removed the rocker cover all looks normal, normal engine oil with no signs of crankcase fuming.
Removed the glow plugs, turned engine over by hand all cylinders were "huffing and puffing", put each cylinder in turn on compression stroke and locked engine, introduced compressed air pressure in through glow plug hole and checked for excessive leakage at crankcase (rocker cover off), exhaust manifold and intake manifold, all cylinders held pressure.

So now thinking, turbo seals failed, resulting in oil at engine pressure being sprayed into intake, resulting in the excessive oil burning and rough running, engine still started normally but ran rough and blew heaps of smoke.

Now to look at overhaul the turbo, replacing the seals and brgs or fit new turbo. On trucks always overhauled the turbo providing that the snails were not burnt out; hard to justify the cost of a new turbo ($5000 +) to a truckie when kits were available.

Didn't know much about this motor, but learning fast. Love the retained washers on the injector spill pipe.

Will post more as the adventure continues

Burto