PeachParts Mercedes-Benz Forum - View Single Post

franklynb · #8 12-04-2016, 12:54 PM

Quote:

Originally Posted by ROLLGUY

If there is no heater installed, it is nearly impossible to get the screw plug out to install one. ...I am sure others have tried it without removing the manifolds, but I can't see how it can be accomplished that way.

here's a picture of the installed location:

The part is available from Mercedes dealers. its around $55.

In one instance, i've unloaded the hex plug with a battery powered impact wrench. In
another, i broke the homebrewed 'socket adapter' and had to re-weld it twice. YMMV.

The hex plug is 13/16", same as the spark plug wrench. I used an old tubular type
SPW and a scrap 1/2" drive impact socket to make a tool that mounts on a 3/4" slider
bar, readily extended with a 1" pipe. I ran a 10mm bolt through and brazed both ends,
which made the tool torsionally stiffer, suppressing breaking the weld.

A 4' cheater bar and an Ox-Acet torch pre-heat almost always allow the plug to be
readily unscrewed from the water jacket. Its galvanically corroded to the cast iron block.
I've also used propane, but It can take a long time to pre-heat. ALL the water must
be removed from the water jacket to allow this to happen.

Swing clearance for the 4' bar obviously does require manifold and/or turbo
removal. See my previous article for more info.