Author Topic: Torques  (Read 2128 times)

Harry

  • Full Member
  • Gold
  • *****
  • USA, TN, Knoxville
  • Posts: 742
Torques
« on: January 24, 2020, 00:26:21 »
1966 230SL Torques
What are the torques for the bolt in the camshaft sprocket bolt?  And how about the crankshaft bolt (with the three spring washers behind the bolt).  The BBB is silent on the camshaft sprocket bolt (or I’m missing it).  I think the BBB says 21 mkp (151 ft lbs) for the “Shoulder screw or clamp nut on crankshaft front”.
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: Torques
« Reply #1 on: January 24, 2020, 05:19:19 »
1966 230SL Torques
What are the torques for the bolt in the camshaft sprocket bolt?  And how about the crankshaft bolt (with the three spring washers behind the bolt).  The BBB is silent on the camshaft sprocket bolt (or I’m missing it).  I think the BBB says 21 mkp (151 ft lbs) for the “Shoulder screw or clamp nut on crankshaft front”.

150 ft lbs is correct for the crank screw. Most 1/2 torque wrenches only go to 150 ft lbs and it's really straining your wrench at it's absolute upper limit. I have a 3/4 torque wrench which rarely gets used but it works well in this application.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

Harry

  • Full Member
  • Gold
  • *****
  • USA, TN, Knoxville
  • Posts: 742
Re: Torques
« Reply #2 on: January 24, 2020, 17:27:34 »
Thanks Dan.  I'll check my wrench and may need to borrow a bigger one from Advance.  I'll torque the camshaft sprocket to the same torque I used for the Horizontal Timing Gear sprocket.  Seems like it was 32 ft-lb but I'll confirm.
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

mbzse

  • Full Member
  • Platinum
  • ******
  • Sweden, Stockholm, Stockholm
  • Posts: 1748
Re: Torques
« Reply #3 on: January 24, 2020, 17:51:56 »
Quote from: Harry
What are the torques for the bolt in the camshaft sprocket?.../...
Torque value for this one is 80Nm
/Hans S

WRe

  • Full Member
  • Platinum
  • ******
  • Germany, Hessen, Seeheim-Jugenheim
  • Posts: 1453
Re: Torques
« Reply #4 on: January 24, 2020, 18:07:41 »
Hi,
Hans is right: 80Nm or 8 mkp (60 ft lb) for the camshaft sprocket bolt and 210Nm or 21+1 mkp (155 ft lb) for the crankshaft bolt for 280SL.
...WRe
« Last Edit: January 24, 2020, 19:39:02 by WRe »

Harry

  • Full Member
  • Gold
  • *****
  • USA, TN, Knoxville
  • Posts: 742
Re: Torques
« Reply #5 on: January 24, 2020, 20:21:52 »
Wow.  I'm surprised that the sprocket for the HTG is to a lesser value (5 mkp)?  Could you confirm that too, please.  I cannot read the German on this table.  Looks like it is from the BBB though so I'll check there again.

Thanks very much - as always!
Harry
Harry Bailey
Knoxville, TN
1966 230SL
Automatic