1983 300SD. I checked the IP timing (my first time) using the drip method. Worked fine--about 22 degrees BTDC--I'll set it to 24 later when I get a special wrench.

It is now leaking at the base of the pipe connection (slow leak, but after a 5 minute drive, the motor mount below is all wet). According to the Service Manual, I took it out and oiled the thread, then re-torqued. It still leaks.

If it leaks, the manual says to "exchange the pipe connection and exchange the copper sealing ring beneath the delivery valve holder" Hmmm...I guess that means buy a new pipe connection and a new copper seal?

When I checked the timing, all I took out was the spring and the delivery valve. How do I get the delivery valve holder out safely? Can't really even see it.


Any ideas Gents? Thanks.