1982 300D won't start -- is engine turning fast enough? - PeachParts Mercedes-Benz Forum

leathermang · #11 09-03-2014, 10:45 AM

Quote:

Originally Posted by sloride

......Then cycle the GPs twice for twenty seconds then crank.

While changing GPs I also spray a shot of WD40 in each prechamber after using the small brush to remove carbon flakes from the reaming process, seems to help restarting with out any trouble. My $.02

The FSM says to leave the Glow plugs on for about 45 seconds... time it... it seems like a long time when you are sitting there looking at it... but they have a chart of how hot the Glow plugs get at various number of seconds of heating...

When reaming the glow plug holes it is important to use heavy grease on the reamer flutes.... so as to bring that carbon buildup BACK OUT ... this needs to be a careful repeat process...

You do not want to blow (or let fall) ... any of that carbon into the precombustion chamber...as it has NO WAY to exit...
it DOES have the ability to impede the flow of fuel spray into the combustion chamber... from those very small radially drilled holes meant for that purpose.

Lots of good threads about the reaming process in the archives....