I believe it provides a means to rod out and clean oil passages. I don't think its done unless the block is out of the car.
Harry Watkins Newton, MS 86 SDL Silver 85 300D Euro 86 SDL Gold 81 240D manual trans ----- Original Message ----- From: "ned kleinhenz" <[EMAIL PROTECTED]> > Just a point of curiousity -- > While cruising through the PDFs in the 124 Shop Manual on CD, > I came across a procedure for "Knocking out and reinstalling steel ball of > main oil gallery" > > What does the steel ball do in the main oil gallery? > Why would you want to knock it out? > > I don't expect to deal with that steel ball while cleaning up after my > disintegrated vacuum pump. > But I am curious what that part of the engine is all about.. > > Ned Kleinhenz
