Hmm... I would think the lobe with the timing lug is positively indexed to the IP driven shaft.

What do 12 ATDC and 17 ATDC mean in the context of an IP on a bench; i.e., not in the engine in which you measure timing?

Sixto
87 300D

Uh - this may be a stupid question, but:

What exactly are you using to read the numbers on the balancer? I'm wondering if you are looking at the wrong spot on the indicator. You should be looking at the passenger side of the triangle shaped tab, not the round hole with the threaded shaft near it. This might explain the numbers being so far off. The TDC indicator bolts to the timing cover, and is adjustable over a 3° range total, but normally this isn't touched.

Timing spec for your car is 14° ATDC, +0.5, -0. But I still don't know what the shop meant by your injection pump being off by 5 degrees. That is not adjustable... the tang is part of the camshaft inside the pump. See photos below.

:nuke:

http://www.w124performance.com/image...r_removed3.jpg

http://www.w124performance.com/image...__RIV_tang.jpg

Dave, is there a timing advance feature inside the IP or just the one in the timer sprocket?

Sixto
87 300D

The timing advance is done externally, by the drive mechanism which is part of the sprocket driven by the chain. No advance is done inside the pump, and nothing to do with timing is done inside the pump.

:scholar: