Cylinder Head - Revised Nut Torquing Procedure
86porsche01Subject: Cylinder Head Torque
Model
911 Carrera
Group
1
Part Identifier
1572
Number
8613
November 10, 1986
The torquing procedure for the cylinder head nuts has been changed as of production date June 30, 1986 from engine numbers: 64G07073 64H00089
Work Sequence:
1. Torque all nuts to 15 N-m (11 ft.lbs.) in proper order.
2. Torque all nuts an additional 90~ in proper order.
The bearing surfaces of the cylinder head nuts and the threads must be coated lightly with "Optimoly H T", Part Number: 000 043 004 00, prior to any torquing.
This new torquing procedure can be applied to all engines from model year 1978 in conjunction with the new cylinder head nut. Part Number 901 104 382 02 (yellow color).
Note: The new torquing procedure does not apply to 911 Turbo engines.