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Author Topic: Head Bolt Lubricant  (Read 1073 times)

filippe

  • Junior Level
  • Finland, Central Finland, Helsinki
  • Posts: 1
Head Bolt Lubricant
« on: November 21, 2023, 03:16:44 »
What type/brand of oil has been used on the head bolts before reinstalling?
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Kevkeller

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  • USA, HI, Honolulu
  • Posts: 388
Re: Head Bolt Lubricant
« Reply #1 on: November 21, 2023, 07:14:12 »
Technically I don’t think you use a lubricant on head bolts because it changes the torque values. If I recall correctly there’s an amount you can drop the torque for a lubricated bolt, maybe 10%. But I don’t know for sure.
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1970 280 SL

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: Head Bolt Lubricant
« Reply #2 on: November 21, 2023, 20:03:05 »
Engine oil on the threads and the washer under.
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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
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