I bought the new bolts for the cam sprocket on my M103 engine. I was told by someone that they THINK that this is an angle torque procedure, but they were not sure. I think they get tightened to 12 Nm and then turned 1/4 turn each.

Any arguments? Any clarifications?

Tahnks for the help,

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Larry Bible
'01 C Class, Six Speed
'84 Euro 240D, manual, 533K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles

The torque on M103 7mm cam bolts is 16NM. All 1987 & later cars or earlier cars with replacement cam & gear. Not stretch bolts as the later M104 engines use(after 1992).

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MERCEDES BENZ MASTER GUILD TECHNICIAN (6 TIMES)
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 16V ITS SCCA racecar

Larry, BTW, how was the rod thing (bent??) you were worried about. I am assuming it turned out OK. Keep us posted...

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE

[This message has been edited by jeffsr (edited 10-26-2000).]

M.B. Doc,

Wow, only 16 NM? This sounds awfully loose. I guess when I tighten it up, it will probably feel tighter than it sounds. That's only about 12 foot/lbs. But I'm sure you're right.

Thanks


Jeff,

I have eyeballed everything, and I don't think there is any lower end problem except the rust. It turned out that the problem was not warpage or a blown head gasket. The problem was corrosion between water passage in head and combustion chamber. I've only had this car less than three years, I suppose the previous owner did not care for the cooling system.

I plan on using a straightedge and feeler guages above each piston to ensure that there is not a bent rod before I put on the head. I don't have a depth mic. I really don't expect to find a problem with this, but I would rather find it now than to take that long walk back up the road to pick up the pieces off the highway.

Unless I run into something else, I hope to have it running again this weekend. In spite of the fact that I'm enjoying driving my new Six Speed C Class, I miss driving the manual transmission 124 car.

Thanks everyone and have a great day,

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Larry Bible
'01 C Class, Six Speed
'84 Euro 240D, manual, 533K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles