Hummer H1 Service Manual page 102

____________________________________________________________________
®
J–6098-01
DRIVER
HANDLE
ADAPTER
J–6098-12
NO. 5
Figure 2-110: Removing Cam Bearings 1 and 5
CAUTION: It is extremely important that the cam bearings be
properly aligned during installation. Failure to align the oil
feed holes in the bearings and oil feed slots in the bearing
bores, will result in engine failure.
6. Note ID numbers on new bearings. Place bearings in order
to maintain correct installation sequence.
7. Mark center position of oil slot in each bearing bore with
grease pencil or chalk. Place marks adjacent to each
bearing bore so it is easily viewed. Make two marks for
no. 1 bearing to ensure that both oil holes will be aligned.
8. Align oil hole in new No. 5 bearing with J–6098-01
alignment mark on block. Seat bearing in block with
driver handle and adapter J–6098-12 (Figure 2-111).
9. Align both oil holes in new No. 1 bearing with oil holes in
block (Figure 2-111). Bearing notch should be facing out
and seam at 11 O'clock position. Seat bearing in block
with driver handle and adapter J–33049 (Figure 2-111).
10. Check installation of bearing number 1 and 5. Verify that
bearing oil holes are centered on slots in bores and that
bearings are flush with edges of bearing bores. The small
groove in each bearing should be towards upper part of
block. Remove and reposition either bearing if misaligned
(Figure 2-111).
11. Install remaining bearings, starting with No. 2, as follows:
a. Insert pilot in No. 1 bearing.
b. Slide puller screw through pilot and No. 2 bearing
bore (Figure 2-112).
c. Position new
(Figure 2-112).
d. Secure adapter to puller screw.
e. Align bearing oil hole with paint mark on block.
f. Tighten puller screw to draw bearing into place.
g. Verify that bearing oil hole is properly aligned.
h. Install bearings 3 and 4 in same manner.
05745159
NO. 1
J–6098-01
DRIVER
HANDLE
ADAPTER FROM
SET J–33049
bearing on adapter J–33049
J–6098-01
ADAPTER J–6098-12
DRIVER HANDLE
NO. 5 BEARING
OIL HOLE (1)
BEARING
SEAM AT
11 O'CLOCK
OIL HOLE
AT 4:30
OIL HOLE
POSITION
AT 1 O'CLOCK
POSITION
Figure 2-111: Installing Cam Bearings 1 and 5
ADAPTER J–6098-11
CAMSHAFT
PLUG
Figure 2-112: Installing Cam Bearings 2,3, and 4
Engine 2-65
NO. 1BEARING
ADAPTER
FROM
J–33049
J–6098-01
DRIVER
HANDLE
NO. 2 BEARING
BEARING BORE
PILOT FROM
J–33049
PULLER SCREW
FROM J–33049