PeachParts Mercedes-Benz Forum - View Single Post - anyone know how to use a diesel pop tester?

Shorebilly · #39 11-19-2006, 09:26 AM

Quote:

Originally Posted by mespe

here's a picture of my injector tester. I've played with it the other day, Here's what I've noticed. I can pump up the pressure, then use the know on the right side to slowly increase pressure until it "pops" This to me seems a little more accurate than moving the handle up and down to build up the pressure to pop the injector, with the knob, there is no vibration and the stream of fuel is easier to see.

corn oil, hmmm gonna have to consider using that.

There are several things that one can learn with a pop test stand.....

If you bring the pressure up slowly, you can find dribblers....

But....if you are testing your spray pattern, you need to operate the pumping handle with a firm, sharp motion.....the camshaft within the FI Pump operates very quickly.......use a piece of paper to determine spray pattern...

However.....the type of Injector used in these 617 Engines makes a buzzing sound....that sound is very important in the setting of your injectors......also the spray pattern is different, it is designed to impinge upon the little ball in the pre-combustion chamber.....

I'll see if I can find some info in one of my old textbooks...and post them here.....

SB