Had this one drop in my lap. Problem is a KNOCK in the engine. It is at idle and more under load. Guess is a rod knock but car pulls well and runs well.
Train of thought
1. Check the compression and do a leak down
2. Drop oil and look for metal in it, Have a filter cutter.
3. If metal drop pan and HOPE.
Low odds
1. Lifter (to loud I think)
2. Loose nut behind the wheel 95% probable.
So far it is LOW on oil about 2 quarts.
NO SMOKE at all
No Oil leaks (British no oil under no oil in)
Starts, idle is smooth
Any ides would help.
Do have a spare D1, 1995 motor that has 65,000 miles so that is an option.

 

there is always the slipped sleeve scenario to worry about.

 

With no white smoke OR overheating problem did not think of that one.
Thank You
George P.

 

Found out the front main is the knock knock.
Got new bearings on way will try to "SLIP" them in with out pulling the engine. Up on my lift now. Will not get to it till Friday.
Any thoughts?

 

Maybe replace all the bearings under there.
Make sure you are not needing oversize by measuring the contact surfaces on the crank.

Make sure you are out of the VIN range of the oil pump assy defect.

 

We bought ALL Std bearings for rods and mains plus anything else I saw that was in that area, gaskets, seals etc.
Thank You for the reply

 

I've got a very minor knock at idle and under light load, but seems to go away when I get on it. Maybe I can't hear it because of the exhaust.

Anyway, I might be doing the same some time soon.

 

Knock or Air Pump going south?