3. Turn crankshaft 180° clockwise (viewed from front
of engine), and align "TC1" timing mark with the
timing pointer. Adjust the inlet and exhaust valve
lash for No. 4 and No. 5 cylinders.
4. Turn crankshaft 180° clockwise (viewed from front
of engine); align "VS" timing mark with the timing
pointer. Adjust the inlet and exhaust valve lash for
No. 6 and No. 8 cylinders.
5. Inspect the valve cover gaskets. Install new gaskets
if necessary. Install the valve covers and crankcase
The PCV valve directs blow-by gases to the
combustion chambers where they are burned. An oily
accumulation around the cover could indicate the
diaphragm has worn through. Replace diaphragm every
2,000 service hours, or annually.
Turn the adjusting screw to allow a clearance
gauge to pass between the top of the valve
stem and the valve rocker arm. See the
LUBRICAT- ION AND MAINTENANCE
1. Clean area around PCV valve.
CHART for correct lash measurement,
2. Remove series of bolts holding cover (1) in place on
3. Clean and inspect all parts and replace as
necessary. Always install new gaskets and
diaphragm when disassembled for inspection.
4. When installing, coat both sides of the gasket (3)
with gasket cement and install against rear face of
inner sleeve (2).
5. To prevent diaphragm (6) from distorting and
tearing during assembly, coat both flange sides of
the diaphragm with gasket cement and install with
face marked "piston side" facing piston (5).
ADJUSTING VALVE LASH
Tighten the adjusting screw locknut.
Check valve lash clearance.
2. Turn the crankshaft 180° clockwise (viewed from the
front of the engine). On later engines, align the
"VS" timing mark with the timing pointer. Adjust the
inlet and exhaust valve lash for No. 3 and No. 7