Tighten the manifold retaining bolts to 18-23 Nm (14-16
lb-ft).
Leak test the manifold O-ring seals.
If no leaks are found during the leak test, the manifold O-ring seals are
good.
If a leak is found at the manifold and the manifold bolts are tightened to
18-23 Nm (14-16 lb-ft), install new manifold O-ring seals and
repeat the leak test procedure. Refer to manifold removal and installation
procedure.