Thank you for this link.


How can one tell when it is time to rebuild the IP?

In my case, the PO installed a 1983 300DT engine into the 1984 300SD. The donor engine he installed has 130K, the old engine had 215K.

Because the donor engine had sat on a pallet for many years, he thought that the donor IP was full of diesel sludge & goo. So he swapped IPs, putting the '84 300SD IP w/215K on the '83 300DT engine.

I have adjusted the IP away from the engine block as far as it will go and the engine still idles very rough when cold. It does run much better now than before that adjustment. The engine seems to run well when going at speed and the idle is certainly smoother when its warmed up.

I have the spare IP from the donor engine, 1983 w/130k miles. If I need to remove the current IP to time it properly, by moving the gear engagement by one or two gear teeth, I was thinking it might be prudent to rebuild the spare IP and install it instead. However the rebuild is another $1,000 extra cost.

__________________
.
1st MBz: 1982 300SD
2nd MBz: 1987 300SDL
3rd MBz: 1995 S420
4th MBz: 1987 190DT
5th MBz: 1984 300SD w/1983 300DT engine
6th MBz: 1999 C230k I'm 3rd owner, got it w/57,235 miles.
and manages Mom's 2007 R320 CDI