Quote:
Originally Posted by elcaBob
The engine in my 77 240D is a 616.912. So, I need one of the larger reamers.
Diesel911, I'll look for that thread, although, I'm a touch paranoid about a bristle breaking off in there.
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Do a Google Image search for Diesel Injector Tube Brushes.
In the pic is an example of some of the used on direct injection truck engines. Note the wire bristle brushes.
Where I worked the handle was removed and the brush was chucked up in a Drill Motor and you shove the brush down the Injector Tube and gave the drill motor switch a few squeezes and pulled the brush out.
We had compressed air and a air gun that had a long needle nozzle on it. We stuck the air nozzle all the way into the combustion chamber and gave it a long shot of compressed air as we slowly pulled it out. See the red arrows.
Also there is only 4 or 5 small holes at the bottom of the pre combustion chamber.
In 18 years as a diesel mechanic I never witnessed or had someone tell me that wire bristle damaged their Engine. And, the bristles do come off especially if you use a Drill Motor to turn the Brush.
Also the bristles on the Injector Tube Brushes are a whole lot thicker then the ones on a shotgun cleaning brush meaning that the real injector tube brush bristle is thicker and you would think more likely to cause damage.
In short if using injector tube brushes was a issue they would not be on sale.
So if you follow the procedure in the service manual of cranking the Engine after you ream to blow out anything in the pre combustion chamber that should take care of any issues.