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  #1  
Old 10-28-2000, 10:16 AM
LarryBible
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My Hanes manual says 52 ft. lbs, then 90 degree angle torque, followed by a second 90 degree angle torque.

I have finished the first 90 degree angle torque and this seems really, REALLY, tight. A few of the bolts even seemed to give way a little toward the end of the 90 degrees.

It seems that if they are to be angle torqued, 52 ft lbs is very tight to start the procedure. The book gives, I believe, 70 nm and 52 ft lbs.

Any comments or information would be appreciated.

Thanks and have a great day,

------------------
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
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  #2  
Old 10-28-2000, 11:16 AM
Glen's Avatar
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Join Date: Sep 2000
Location: Carlsbad, CA USA
Posts: 1,186
Larry,
According to my MB 103 Engine Manual those values are correct. Maybe what you're feeling after the first 90 degrees is bolt stretch??? You did use new bolts, right?

Good luck,
Glen



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Glen Tokuhara
'86 300E (5-speed)
'87 190E 2.3-16 (5-speed)
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  #3  
Old 10-28-2000, 11:23 AM
LarryBible
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Glen,

Yes I believe that it is bolt stretch. I was told to measure the bolts to see that they are not overlength and reuse them.

I noticed that you have a manual transmission 300E. How do you like it? I'm a manual transmission fanatic and will never part with mine. It took me a long time to find it.

Thanks for the reply,

------------------
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
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  #4  
Old 10-28-2000, 11:38 AM
dacia's Avatar
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Join Date: Mar 2000
Location: Here.
Posts: 315
Larry,

According to my 103 service manual (paperback, original from Benz) those values are correct if 70 Nm equals 52 lbs of torque. This manual lists all torque values in Nm.

"Cylinder head bolts when engine cold 1st stage 70Nm.

Check cylinder head bolts. Each time the cylinder head bolts are tightened they are subject to a certain permanent stretch. If the maximum lenght of 108.4mm is exceeded, the bolts should be scrapped and replaced by new ones."

Alex



[This message has been edited by dacia (edited 10-28-2000).]
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  #5  
Old 10-28-2000, 11:53 AM
Glen's Avatar
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Join Date: Sep 2000
Location: Carlsbad, CA USA
Posts: 1,186
Laryy,
I assumed that since the bolts are designed to stretch when first installed, they should be replaced. I suppose if they are within spec then it doesn't matter. Perhaps one of the techs can elaborate.

I love my 300E although mine is pretty tired, ~250,000 miles of which I've contributed the last 70,000. I bought it 4.5 years ago on a whim. I was looking for a 16V and stumbled upon it. I decided to buy it because I knew how rare they were. In it's previous life it wasn't taken care of, I believe early on it was in an accident and repaired. It's far from perfect but it's still serviceable. My dream goal is to find a really nice 'regular' 300E with all the options I want and then swap trannies.

Anyway, good luck and let us know how your repairs go.

Glen
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