How to set timing on a mechanical pump?

[ShawnR]

Has anyone here ever come across a good doc describing how to set the timing on a DB2 mechanical injector pump? I am going to be transferring mine over to the new block tomorrow and have no clue how to set the timing other than the little dots on the gears.

Do you just get it running and fine tune by ear, or is there a special procedure?

 

[mattthebrat]

You can get it close while putting it together, and then fine tune it by ear, until you are happy with it, or there is a diesel timing light that screws into the GP hole, if you want to be really accurate.
Here is a good article on timing from Oliver Diesel: http://www.oliverdiesel.com/tech/timing.htm

 

[Turbine Doc]

PM member RATMAN he recently did the conversion DS4 to DB2 and is up to speed on that task.

 

[jrsavoie]

Maybe we could get the information posted someplace. This is information I am also in current need of.

 

[Turbine Doc]

I'll ask him if he can do us a write up; BTW homey where's the sig

 

[Acesneights1]

If you didn't mark the pump to housing before removal then
you line the marks up and go from there by ear. it should sound slightly marbley when warm and running.There should be a line on the pump and where it mounts. Kent moore made a weird looking timing thing for 6.2s but i don't know anyone who has one or knows how to use it. I always did them by ear. No problems. Did many 6.2s.

 

[gmctd]

1mm inj pump rotation = 2*

Scribe a line across the DB2 and timing cover from the original engine, close to center as possible, which is the upper clamp stud\nut - pull the pump, measure the exact offset of your mark to the stud, mark the new timing cover to that exact point - install the pump on the new timing cover to that mark - you should be within a rch of timed

Crank sprocket timing mark at 12 - cam sprocket at 6 - rotate crank 360*, sprocket mark at 12 - cam sprocket mark at 12 - inj pump drive-gear mark at 12 - inj pump driven-gear mark at 6, aligned with drive-gear mark

Do that stuff and yer good to go.......................