Pontiac tempest 1968 Service Manual page 274

V-8 E N G I N E
6-57
ifci.jp
J-6173-1 J-6173-3
F i g . 6-98 Removing Camshaft Bearing
2. Insert replacer adapter J 6173-3 into rear of
bearing to be removed so that shoulder on remover
bears against rear edge of bearing.
NOTE; If rear bearing is to be removed, ii will
be necessary to remove camshaft rear plug.
3. Place Indexing collar J 6073-6 on threaded end
of shaft with open side toward unthreaded end and
start thrust washer and nut on shaft (Fig. 6-97).
4. Insert shaft and indexing collar through r e ­
mover and replacer adapters and position lug on
Indexing collar in ventilator hole in front of block
(Fig. 6-97). This Indexes shaft so that i t cannot
rotate.
5. Slip key J 6073-5 into notches In shaft behind
bearing to be removed (Fig. 6-98).
6. Turn nut on front of shaft to pull key against
remover adapter J 6173-4, then continue to turn
nut until bearing is pulled out of Its hole.
CAMSHAFT BEARING—REPLACE
1. Place a clean rag against each side of trans­
verse member just below bearing hole to catch any
shavings and carefully clean up hole. A l l scratches
or nicks in cast Iron should be smoothed with a
scraper or f i l e . Chamfer the rear edge of hole
slightly to reduce possibility of shaving down the
outer diameter of bearing when It Is Installed,
2. Insert remover adapter J 6173-4 into front
bearing to act as a support for the shaft.
NOTE; If front bearing is being replaced, insert
remover adapter in center bearing to act as sup**
port for the shaft.
4. Coat outside of new bearing with o i l and place
it over replacer adapter J 6173-3, Indexing notch in
edge of bearing with pin on replacer adapter.
NOTE; The notch in edge of bearing is used to
properly position the bearing, with respect to oil
holes, when it is installed. When bearings are in­
stalled in production, notches all face front except
the one in rear bearing. In service it is necessary
to install bearings with notch facing the rear.
5. Position replace adapter J 6173-3, with bearing
in position against shoulder, against rear of hole in
which bearing is to be installed (Fig. 6-99). Index
mark on shoulder of replacer must point down (to­
ward crankshaft side) to properly position bearing.
6. Insert shaft with indexing collar, thrust washer,
and nut through remover, pilot and replacer adapters.
Index lug on collar with ventilation hole in front of
block (Fig. 6-97).
7. Slip key J 6173-5 into notches i n shaft behind
replacer adapter J 6173-3 and tighten nut to start
bearing into hole (Fig. 6-99). Continue to tighten nut
until bearing has been pulled completely into its hole.
When properly positioned, i t w i l l be approximately
flush with both sides of the transverse member.
NOTE; Rear bearing should be pulled in until
front edge is flush with block. This will leave
shoulder at end of counter bore for camshaft
rear plug visible behind bearing.
8 . Remove remover and replacer
set
J 6173.
9. Visually observe that holes in bearing line up
with drillings in block.
10. Carefully remove rags used to catch particles
of metal and use magnet or vacuum cleaner to make
sure that a l l metal particles are removed from block
surfaces and o i l d r i l l i n g s .
3. Insert pilot J 6173-7 into hole in which bearing
is to be installed.
F i g . 6-99 Installing Camshaft Bearing