i have the prechambers out of the head and was wondering if the "ball' can be removed for cleaning and if so how. are they pressed in or screwed in?

thanks, hunt

They are just part of the casting. Not a separate piece.


Get a pipe brush.

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The ball is not meant to come out. Removal would create so much damage that you'd never get the ball back in to stay. I used an ultrasonic bath filled with water in which I immersed a cup of acetone (the only solvent I had, not necessarily the best) and soaked the prechambers in that all day. Various picks and brushes were then used to remove as much carbon as possible. It doesn't need to be perfect.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Turns out the ball assembly comes out quite easily. Here's some shots:

Front and back side:





Holding jig for pre-chamber:





Comes out with no problem. Front and back sides:





When re-assembling, the line shows the proper orientation:

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250