22-18
CYLINDER HEAD ASSEMBLY
(Refer to Figure 13)
Disassembly
1. Using a valve spring compressor, com-
press the spring (1) enough to remove the
valve retainer locks (2). Release the
spring compressor and remove the intake
valve spring retainer (3) or exhaust valve
rotator (4) if equipped. Remove the valve
spring (1), valve stem oil seals (5) and
valve spring seats (6) . Remove any car-
bon from the valve stems before they are
removed from the cylinder head.
2. Remove the intake valves (7) and the ex-
haust valves (8) from the cylinder head
(14) and set them in a rack or holder.
Mark them on removal so they may be
installed in their original location.
3. Drive the intake valve guide (9) and ex-
haust valve guide (10) down through the
head using an arbor.
4. The exhaust valve seats (11) and intake
valve seats (16) if equipped, can be re-
moved with a special seat removing tool,
Inset C.
NOTE Never attempt to remove
a valve seat with a center punch, cold
chisel or pry bar.
5. To remove the expansion plugs (12) and
(13), they must be drilleo. and pryed out.
NOTE Refer to Inspection and Servicing
on Pages 20,21,22 and 23 prior
to assem-
bly.
Assembly
1. If the valve guides have been replaced,
install the new guides (9 and 10) using an
arbor. Press the guides into the head from
the top of the cylinder head. The guides
must protrude above the cylinder head
(intake and exhaust) .953", Inset A.
2. To install new exhaust valve seats (11) and
intake valve seats (16) if equipped, clean
the recess in the cylinder head. Place the
valve seats in dry ice to shrink them. In-
sert the valve seats in the head and press
them in place, using a suitable press.
3. Lubricate the intake valves
(7) and exhaust
valves (8) with clean engine oil and install
them in their original locations.
4. Install the valve spring seats (6), valve
springs (1) , the valve retainers (3) or
exhaust valve rotators (4) if equipped.
Compress the valve springs so the valve
stem seals (5) can be installed in the lo-
wer grooves of the valve stems. Install
the valve retainer locks (2) . Remove the
spring compressor carefully.
IMPORTANT Assemble the exhaust valve
rotators with the original exhaust valves
because they tend to wear in as matched
parts.
If it is necessary to install a new
exhaust valve, al ways install a new ro-
tator (4) if equipped and retainer locks (2).
5. Install new plugs (12) Inset B and (13)
Inset D, if they were removed.
If the mani-
fold studs (15) are to be replaced, install
as indicated in Inset E.
NOTE When engine assembly is complete,
a check of the operation of the rotators
must be made.
It is impossible to deter-
mine whether or not the rotator is turning
without an identifying mark.
Place a dab of white paint on each of the
rotators and note it's position. Start the
engine and observe whether or not the ro-
tator is turning. DO NOT attempt repairs
on rotators.
There is not a set speed at which the ro-
tators should turn. Some rotators will turn
faster than others. As long as the rotator
is turning the valve, it is functioning pro-
perly.
To Next Page
Loading...
