3-70. CAM FOLLOWER ASSEMBLIES AND CAMSHAFT INSTALLATION (Contd)
Camshaft (2) (Contd)
(4) Rotate camshaft gear (1) in
Normal backlash is 0.004-0.016 in.
opposite direction as far as it will
(0.102-0.406 mm) between a new
freely move. The reading on
camshaft gear (1) and a new
indicator shows amount of
crankshaft gear (9). Minimum
backlash between gears.
backlash for a new camshaft gear
is 0.002 in. (0.051 mm). Gears will
begin to make noise if backlash
exceeds 0.010 in. (0.254 mm). If
noise is acceptable, do not replace
gears unless backlash exceeds
0.020 in. (0.508 mm).
Perform steps 3 and 4 to install any one of the three cam follower assemblies. Repeat steps
3 and 4 as required to install each additional cam follower assembly.
New cam follower assembly
Install on dowel pins and
Use gasket or gaskets with same
cylinder block (4).
thickness as those removed (refer
to para. 3-28). Total gasket thick-
ness must be between 0.014-0.080
in. (0.356-2.032 mm). Install gas-
ket (P/N 3020000) (M915A1/
Big Cam III) so that it is against
cylinder block (4) and sealing bead
faces cam follower assembly (6).
Cam follower assembly (6)
a. Install on cylinder block (4).
Strike housing with soft-nose
hammer to push it onto dowel
pins on cylinder block (4).
b. Secure with six screws (7). Six
Tighten to 15 lb-ft (20 Nm) in
lockwashers (8) are also used on
tightening sequence (10) shown in
M915/Big Cam I engines.
illustration, then tighten to
30-35 lb-ft (41-48 Nm).
FOLLOW-ON TASK: Install cylinder head assembly and pushrods (para. 3-71).