10.12
Section 10
Reassembly
Valve Stem Seals
These engines use valve stem seals on the intake and
exhaust valves. Always use new seals whenever
valves are removed from the cylinder head. The seals
should also be replaced if worn or damaged. Never
reuse an old seal. See Figure 10-44.
Figure 10-46. Installing Valves with Valve Spring
Compressor.
Install Cylinder Heads
1. Check to make sure there are no nicks or burrs on
the sealing surfaces of the cylinder head or the
crankcase.
2. Check that the dowel pins are in place in the two
lower locations, and install a new cylinder head
gasket, (printed side up). See Figure 10-47.
Figure 10-44. Valve Stem Seals.
Assemble Cylinder Heads
Prior to installation, lubricate all components with
engine oil, paying particular attention to the lip of the
valve stem seal, valve stems, and valve guides. Install
the following items in the order listed below using a
valve spring compressor. See Figures 10-45 and 10-46.
• Intake and exhaust valves
• Valve spring retainers
• Valve springs
• Valve spring keepers
• Valve stem seals
Figure 10-45. Valve Components.
Figure 10-47. Installing New Head Gaskets.
NOTE: Match the numbers embossed on the
cylinder heads and crankcase. See Figure
10-43.
3. Install the cylinder head. Make sure the head is
flat on the gasket and dowel pins. Install a flat
washer on the screws in locations 1 and 3. Install
the spacer followed by a flat washer on the
screw in location 5. See Figures 10-48 and 10-50.
Start the five hex flange screws.
Valve Stem Seals
Valve
Spring
Retainer
Keepers
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