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140 ENGINE
12. The camshaft can be removed by sliding it forward
until it clears the head.
Bearing Replacement
1. With the camshaft removed and the camshaft removal
Tool J 23591 installed, all camshaft bearings can be replaced
without removing camshaft end plug.
2. Install remover-installer plate of Tool J 23638 into
front bearing and tap bearing from bore using driver handle
supplied with J 23638.
3. To remove the remaining bearings, install guide plate
(supplied with J 23638) into front bore of head; then remove
cam bearings as described in Step 2 (Fig. 6A1-29).
CAUTION: Tap the
rear
bearing slowly into
distributor shaft housing being careful not to
unseat end plug. Crush beanng to remove from
housing.
4. Install new bearings beginning with rear bearing and
working forward.
CAUTION : Oil holes in the three rear beanngs
must be aligned with the oil holes in the case. Oil
holes in the fint two bearings should be placed in
the
11
o'clock position (as viewed from fiont of
engine) and oil groove in number one beanng
to ward front of engine (Fig. 6A 1-30).
Installation
Fig.
6A1-31
Measuring Camshaft End Play
1. Position camshaft into cylinder head until journals are
seated in their respective bore.
2. Raise the car on a hoist; raise front of engine and
remove wood blocks from engine front mounts. Install engine
front mounts and lower car on hoist.
3. Install a new gasket, timing belt upper cover and
retainer plate and seal assembly to retain camshaft. Torque
retainer screws to 18 lbs. ft.
4. Attach a dial indicator to cylinder head so that
indicator plunger can follow camshaft movement. Move
camshaft forward and rearward and record movement (Fig.
Fig.
6 A 1 - 3 2
Measuring Camshaft Retainer
6A1-31). If not within
.004
to .012 inch. select a new camshaft
retainer, using the following procedure:
a. Remove camshaft retainer and measure thickness of
cam locator on retainer. A depth gage or one inch
micrometers may be used (Fig. 6A1-32).
b. Select a suitable retainer from parts stock that will
provide the proper end play (Thicker retainer will provide less
end play). Camshaft retainers are available in three sizes:
.228"
-
.230N
,230"
-
.232"
,232"
-
.234
c. In selecting the proper retainer, measure the thickness
of camshaft locator and compare with that of the retainer
being replaced (Fig. 6A1-32).
NOTE: If no camshaft end play was measured and the
retainer removed measured .234", replace with a thinner
retainer (.230N).
5. Remove Tool J 2359 1 by first releasing the valve lifter
depressing levers; then remove screws holding tool to the
cylinder head.
6. Install camshaft timing sprocket, timing belt and front
cover.
7. Install ignition distributor.
8. Start engine and set timing to specification.
VALVE STEM OIL SEAL AND/OR
VALVE SPRING
Removal
1. Remove camshaft as previously outlined.
2. Release spring tension on the lifters, position the lever
to one side and remove each lifter.
NOTE: Keep lifters in order so they can be returned to
the same location.
3. Remove spark plug at the cylinder($ to be serviced.
4. Install air line adapter Tool J 23590 to spark plug port
and apply compressed air to adapter to hold valves in place
(Fig. 6A1-33).
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