1990 300D 2.5 Running Rich - Page 2 - PeachParts Mercedes-Benz Forum

sixto · #1 12-23-2008, 07:54 PM

Quote:

Originally Posted by mcguirjf

I just got the IP back from the shop and was told the timing indicator in the IP was off 5 degrees. It was at 12 ATDC and is now set at 17 ATDC.

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

sixto · #2 12-23-2008, 08:36 PM

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

Sixto
87 300D

gsxr · #3 12-24-2008, 10:01 AM

Quote:

Originally Posted by sixto

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

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.