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 (5) Loosen the nuts on each end of the cam and balance shaft. Remove the nut (34, 35) and lock washer (36, 37)
from the balance weight end of each shaft. Do not remove the nut from the drive gear end of the shafts.
(6) Remove the balance weights (33, 38) by prying with two heavy screwdrivers or pry bars between the heads of
the bearing retainer bolts (13) and the balance weights.
(7) On B engines, remove the thrust washers (31, 39) between the bearings and the balance weight hubs.
(8) Remove the set screws (6) that secure the camshaft intermediate bearings.
(9) The three bolts that secure the cam and balance shaft bearings to the rear end plate of the engine may be
removed by inserting a socket wrench through the hole in the webs of the cam and balance shaft drive gears.
(10) Withdraw the cam and balance shafts (3, 29) from the rear end of the cylinder block.
(11) If the thrust washers (39, 31) located between the bearings and thrust shoulders at the front end of the shaft
on the B engines are not removed with the shafts, they should be pulled out when removing the bearings.
(12) The cam and balance shaft front bearings (1 and 32) (and thrust washers B engines) may be removed after
taking out the bolts that hold the bearings to the end plate and cylinder block. Pry under the bearing flange with a suitable
tool if the bearing cannot be withdrawn by hand.
c. Removal. (Transmission and Flywheel Housing Installed ).
(1) Remove bolts and washers shown in figure 3-98 and remove the balance weight cover.
(2) Remove the parts, accessories and assemblies that are necessary to facilitate the removal of the flywheel
housing hole cover over the camshaft and the front balance weight cover.
(3) Remove the cam followers and push rods (para 3-8).
(4) Remove the front balance weight cover and place a wood block between the balance weights (fig. 3-98).
(5) Detach the gear nut retainer (18 and 22, fig. 3-100) after removing the bolts (19 and 23).
(6) Loosen and remove the nut at each end of the camshaft.
(7) Remove the balance weights (33 and 38) by prying with two heavy screwdrivers or pry bars between the heads
of the bearing retainer bolts and the balance weights.
(8) Remove the thrust washers between the bearings and balance weight hubs (B engines only).
(9) Remove the set screws that secure the camshaft intermediate bearings.
(10) Remove the three bolts that secure the camshaft bearing to the front end plate.
(11) Install the camshaft gear puller, J 1902-01, four spacers, J 6202-2 and camshaft gear puller adapter plate J
6202-1 on the camshaft gear.
(12) Turn the center screw of the puller clockwise to disengage the camshaft gear.
(13) Do not remove the puller or adapter plate until the camshaft is reinstalled. The adapter plate, secured to both
the flywheel housing and the camshaft gear, will hold the gear (thrust washer also on D engines) securely in place and in
alinement which will aid in the reinstallation of the camshaft.
(14) Remove the front bearing from the camshaft and pull out the inner thrust washer (B engines). Then pull the
camshaft and intermediate bearings from the cylinder block.
d. Disassemble Camshaft or Balance Shaft.
(1) Remove the gear from the shaft.
(2) Slide the rear bearing, and the thrust washer (D engines) off the shaft.
(3) Remove the lock rings from the camshaft intermediate bearings and free the two halves of each bearing.
(4) To facilitate the removal of any foreign matter lodged behind the camshaft oil passage end plugs, remove plugs
as follows:
(a) With the camshaft still clamped in the vise, make an indentation in the center of one of the end plugs
with a 31/64 inch carboloy tip drill.
(b) To aid in breaking through the hardened surface of the plug, punch a hole as deep as possible with a
center punch.
(c) Use a 1/4 inch carboloy tip drill and drill a hole straight through the center of the plug. Then, enlarge
the hole with a 5/16 inch carboloy tip drill.
(d) Tap the drilled hole with a 3/8 inch-16 tap.
(e) Thread the 3/8 inch-16 adapter J 8183 into the plug and attach the slide hammer J 6471-1 to the
adapter. Remove the plug by striking the weight of the hammer against the handle.
(f) Insert a 3/8 inch diameter steel rod into the camshaft oil passage and drive the remaining plug out.
f. Inspection and Repair.
(1) Examine the cams and journals. If the surfaces are badly scored or worn the camshaft will have to be
replaced.
(2) Check the cam followers if the cam surfaces are scored.
3-144
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