Curly, I had to read that a couple times before I understood how it would work. I think I've got it; while the IP plunger is rising but the chamber opening is still exposed, delivery hasn't started and the fuel flows out instead of up. Once the chamber opening is covered, further movement of the plunger pushes the fuel up into the dv.
As I see it, the trick for using a start-of-delivery method is "pressurizing" the IP circuit without a priming pump. A gravity-fed reservoir would do it. -- Max Dillon Charleston SC '87 300TD '95 E300 On September 20, 2015 11:31:24 AM EDT, Curly McLain via Mercedes <mercedes@okiebenz.com> wrote: >I developed my own method for timing om621/616/617. It does NOT >involve removing the pin on the DV. I take a straw and blow the fuel >out of the flared part of the connector on the IP (DV holder) for the >#1 cyl. turn the engine very slowly when you are coming up to the >timing mark. When the fuel just begins to rise, the delivery is >starting. I set the time 1 to 2 degrees in advance of the book spec >to allow for the fact that delivery actually started, and that the DV >spring had to be overcome. It has always worked on the cast iron >head engines. > >I don't like disturbing the DV just to do timing. It increases the >possibility of introducing contaminants (grit etc) into the IP. >Plus I never had extra seals and orings around to reseal the DV. > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
