Does anyone have experience with using the MB WIS? If you get a 3 day membership, can you just download all the info for a single vehicle, or do you have to log in to access it each time?

 

Each time.

What do you need to know?

 

I bought a OM642 with a leaking rear main seal. It turned out to be much worse than originally thought it was. The vehicle runs, but it's got very heavy oil in it. I don't know if the heavy oil was put in to slow the leak down, or to hide main bearing issues.
I was hoping to get into WIS to look at what would be involved with checking and/or replacing the main bearings. From looking at it, It looks like it would be possible to drop the front sub-frame to get at the bottom end. It also looks like it would be possible to pull the engine out the top. I was hoping WIS would have detailed work procedures for this.

 

Are you referring to the engine rear main seal?

The first thing you must do is update your profile to include the year, model, is it gas, CDI or Blue and where you live, which tells us you have right or left hand drive.

 

Yes, I suppose that would be helpful.

 

You don't remove the engine, you remove the transmission to replace the eng. rear main seal. Then when the trans. is removed, replace the trans. front seal. This is not an easy task and special tools needed and on a lift.

 

Thanks, those docs look great! My comments about removing the engine were regarding main bearing inspection/replacement. I don't suppose you have any thoughts/info on that?

 

I do not understand................main bearing inspection/replacement.

 

The bearings that hold the crankshaft in place. I'm concerned about their condition, so I'd like to inspect/measure them and if necessary, replace them.

 

Interesting thing regarding OM642 main bearings

these bearings are at least partially held in place by big bolts that run horizontal from the bearing cap through holes in the side of the engine block, with the hex head visible and accessible externally. These are one time use only bolts with specific tightening procedures.

 

Monumental task, remove the engine.

 

@Black_smoke Have you ever done this before, measured bearings on an engine that wasn't being fully rebuilt on a stand, outside the vehicle? You are asking about several things in this thread.

Major oil leaks on the OM642 can come from several places, the oil cooler and the rear main seal. Possibly other sources. Have you ruled out the oil cooler as the leak source? It leaks down the rear of the engine. You need to spend a good chunk of time under the vehicle with a high power flashlight to see what's going on.