Timing a new pump?

[corelokt]

I've got a new injection pump installed. Once I test the injectors and get it running and warmed up, to time it, do I
advance the timing until it rattles a bit much, back it a mm and try it?
Am I trying for no gray smoke and low egts or is that to much to hope for?

 

[doghead]

The only correct way to time it is with a timing light.

You can simply set it on the marks, and guess you are close enough if you do not have the proper tools.

 

[Chaski]

It will run with the timing marks aligned. But I am about 95% sure that somewhere in the GM diesel supplement there is some sort of chart with suggested advance in millimeters on the marks. If you don't run some advance it will be hard to start in the cold and will smoke. When I get some time to dig around I will post it if I find it.

Update...

Found it.

The pump mark should be offset to the drivers side. If you download "The 6.2 Liter diesel engine" GM training manual 16015.05-1C there is a nice illustration (4-166) on page 4-99 that shows that the correct adjustment range is an offset of 2.5-4mm (Update.... might be too much, refer to the manual)toward the drivers side (exact offset depends on your pump model). Get out a 15mm wrench and move your pump to where it is offset 2.5mm (update... MIght be too much advance!)Give that a try and see how you like it

2nd update...
i just read the manual again, and it is more ambiguous than I thought. Looks like the part I read might not apply due to year of manufacture. So take some time to read the manual for yourself. Sorry about the bad info.

 

[corelokt]

Thank you. I don't have a timing pointer on it, so I've got to use the hand, eye, ear method. I've got a modded pump for a higher output too. Plus the hx40w2 turbo. I'll try it and see what happens.
Its a 4911 db2 with a fresh timing gears and chain.

 

[Chief_919]

If you don't have one, one of these makes tightening it without moving your fine degrees of adjustment so much easier.

http://amzn.to/2wedv3w

 

[Barrman]

There is also the advance arm method:

Warm up the engine. Use a screwdriver to push the rod on the bottom passenger side of the pump in. If the engine dies, too far retarded. If the engine misses a bit, but doesn't die then pretty close to right on. If nothing changes except maybe a slight sound difference, then too far advanced.

 

[corelokt]

5 good injectors, one bad nozzle, one at 1200 psi and one at 3k psi. I went ahead and ordered a full set. I'll do some mix and match and get a good used set put together from my parts injectors and sell them later. Another couple days down.

 

[corelokt]

The pump and injectors are in and working. Wound up needing a new glow plugs solenoid too.
It's making black instead of white smoke now. Guess it needs the pump advanced?

 

[corelokt]

Turned it back 2mm and I have a light haze now when getting into the pedal. Good power and low egts. Seems about right.

 

[corelokt]

New injection pump, hard warm starts

Just wondering if that might be fixed by advancing the timing a mm? I backed it off 2mm when it was making black smoke on acceleration.

 

[doghead]

Merged.