B3.9 and B5.9 Series Engines
A/C Cylinder Head (QE Models) (012-104)
Section 12 - Compressed Air System - Group 12
Valve Spring Tester, Part No. 3375182
Use the valve spring tester, Part No. 3375182, to check the
unloader valve spring (blue stripe).
Replace any spring that does not meet specifications.
Compress springs to 24.9 mm [0.98 in].
NOTE: Holset recommends new springs be installed.
Install the exhaust valve over the post in the valve plate.
Apply a thin coating of anti-seize compound to the inside
circumference 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