A/C Cylinder Head (QE Models) (012-104)
B3.9 and B5.9 Series Engines
Section 12 - Compressed Air System - Group 12
Apply a thin coating of anti-seize compound to the inside
diameter of the exhaust valve retainer.
Slide the exhaust valve retainer over the valve plate. Make
sure that the end of the retainer with the groove faces
Single-cylinder heads must be flat within 0.03 mm [0.001
in] between any two adjacent capscrew holes.
Single-cylinder top cover must be flat within 0.06 mm
[0.0024 in] between any two adjacent capscrew holes and
0.10 mm [0.004 in] total.