How to you remove the crank shaft bolt and what is the proper torque for this bolt? M103 engine 91 300e te 4matic.

Can anyone advies please????

27mm 6-point socket.

Torque is way up there -> 250-300 lbs. approx.

I believe there's a tool that used to lock the flywheel in order to loosen crankshaft bolt.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

There is a tool to lock the flywheel and in my opinion, using it is the best way to do it. I just recently read on here where someone suggested removing one of the bolts from the torque converter/flywheel and installing a long bolt that lock the rotation of the crankshaft down to allow you to loosen/tighten the crank bolt. I have the tool for the M103 engine and w$$ish I had the one for the 617 but am planning on trying the long bolt trick next time I have to tighten one up. Right now I lock em down with a long crow bar and the proper breaker bar/socket on the crank bolt. It takes two people to do it this way. Ya'll should have been out there last time I asked the wife to help with it.

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Jim

I have given you the full CD pages for all the jobs you are posting. Have you gone there ??
The last 2 are job 03-3420
and 03-5000

If you are not using these , please advise me so I do not waste any more time looking them up...or at least acknowledge

http://webwench.net/w123manuals/Service/W124/Index/103/03Engine.htm

Arthur,

Thank you for your posts but unfortunatly I could not locate how to lock out the the flywheel.

Where can I buy the lockout for the flywheel for the M103 engine??

I do not know who sells the specal tool. According to one tech in the following thread, it's around $100.00.

Look at what Jim Kimmey had to say in this same thread. His approach may work for you.

http://www.peachparts.com/shopforum/showthread.php?t=6454&highlight=flywheel+lock

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

On my 1992 300SE, I cut a section of the old serpentine belt that would wrap around the crankshaft pulley and used a chain pipe wrench (Harbor Freight - $20.00) and then used a breaker bar with a long (3ft.+) pipe on the breaker bar handle to loosen. Wedge the pipe wrench against the chasiss rail or have someone with a second pipe hold it in place. Same method to tighten using a torque wrench if one is available with the proper torque range. If not, tighten until can't go any further, then tighten some more.

Tim

I removed the oil pan and blocked the crankshaft with a wooden block.
This was also because I was a little worried about the seal between the oil pan and the lower front cover. It worked and I have no oil leaks. Removing the oil pan was relatively easy.

I missed the 4-matic part of the original post, with a 4-matic removing the oil pan may be not a good option.