Head Bolt Lubricant

[filippe]

What type/brand of oil has been used on the head bolts before reinstalling?

[Kevkeller]

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.

[Benz Dr.]

Engine oil on the threads and the washer under.