PeachParts Mercedes-Benz Forum - View Single Post - How to Set IP Timing via the Drip Tube Method

Stevo · #12 11-11-2008, 12:07 PM

[QUOTE=ForcedInduction;2017043]The bubble method, its inaccurate and shouldn't be used by anyone.

Please excuse my crappy OCR program but here is what the late Marshall Booth had to say about the bubble method.

at~ Ved 03 Jul 2002 12:36:38 -0400 ~- rom Marshall Booth
Subject Re [DIESEL] IP Timing

Mike, Here are several ways to time the pump (its almost NEVER out of time except by about 1/2 the amount of chain stretch you have and that usually isn’t any problem until the chain needs to be replaced). The bubble method is the easiest!

I’ll include all 3 WAYS that I know of to do it.

> Bubble method!

> On the subject of diesel timing. If you are replacing the pump or rebuilding the engine. The simplest and most accurate way of setting the
> pump is. Disconnect_the fuel line going into the pump from the filter.
> Take the spring and plunger out of #1 delivery valve, put the delivery
> valve back in and snug it down, hold the the pump linkage in the full
> open position. If you have the drip tube install it on the delivery
> valve, if not use the injector line in such a way that it is pointing
> away from the engine. It you don’t mind the taste of diesel you can blow
> through the fuel line or use low air pressure. Put the open end of the
> injector line in a glass of water and watch the bubbles. Turn the engine slowly until the bubbles stop and check the timing mark. After
> tightening the pump recheck. This method is really more precise than it
> needs to be and although it may sound complicated it is very easy. Bob