I need the torque spec. for the head bolts on a 1991 mercedes 300e 3.0 Lt.
Asked by glenngin3058 Feb 08, 2013 at 10:19 PM about the 1991 Mercedes-Benz 300-Class 4 Dr 300E Sedan
Question type: Maintenance & Repair
trying to put my heads back on
3 Answers
migration_judge_roy answered 11 years ago
Mercedes says "ask a dealer to print out" is as far as I could take this thing. not start in the center use a counterclockwise direction to make a spiral for the fasteners gradually bringing the torque up to 80-90 psi, as one might guess. Why can't they just be forthcoming? why must they make a riddle for us?
Get a service manual if you are doing it yourself. And not all engines use a spiral torque sequence. Some start in the middle and work out. Better to check the book, which will give you the pattern as well as the torque sequence. These allow engines are very particular about both. It isn't just a matter of gradually getting to the spec. It is a matter of the increment being specified as well.
