On my 1982 300D turbo (200K miles) I used to add about a quart of oil every 2000 miles. recently oil consumption has gone up to more than 1qt every 1000 miles. i went on a crusade to fix external oil leaks but not too much was leaking. When i take off the oil fill cap it puffs like a choo choo train so i think the blow by is excessive. The air filter was getting drenched with oil on one side (I resealed the leaky oil trap cover with silicone) the exhaust tail pipe has a thick coat of soot as well. Oil trap drain is open (I poured oil down it to check). I noticed some oil around two of the head bolts (star heads). thinking it was the valve cover i cleaned them off but a small amount of oil reappeared back at the two head bolts. Should i retorque the head? Could that be the oil burn problem?

I plan on pulling the glow plugs to see if there is oil associated with one of the cylinders more than another.

I bought the car 30k miles ago from the original owner. About 50K miles ago the PO's mechanic (The Diesel Stop, in San Gabriel, now out of business) replaced the piston rings, main & rod bearings, head & flywheel bolts. Also grind crank, re-size rods. Compression after work completed was noted as 300, 280, 300, 320, 280. Complaint was excessive noise and low oil pressure.

Maybe unrelated but the engine shakes more at idle. I adjusted the rack bolt but no difference. Power is still OK with engine.

Any suggestions?

Thanks

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1972 450SL
1982 300D Turbo