Hummer H1 Service Manual page 1040

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DUAL OIL FILTER
Removal
1. Remove oil filters from oil filter adapter.
2. Remove bolt, gasket and two small o-rings securing
adapter to engine block and remove adapter.
3. Remove large o-ring, plug and two connectors from
adapter.
Installation
1. Use pipe thread sealant (Loctite 592) on the threads of the
pipe plug and install the pipe plug in the oil filter adapter.
Remove any sealant that might have gotten into the oil
passage during the pipe plug installation (Figure 13-72).
2. Install two oil filter connectors in the oil filter adapter and
tighten to 25 lb ft (34 Nm).
3. Install the large o-ring in the groove on the oil filter
adapter.
ADAPTER
OIL
FILTER
05745159
PLUG
O- RING
GASKET
BOLT
Figure 13-72: Dual Oil Filter Assembly
4. Install two small o-rings in the grooves in the oil filter
bolt.
5. Install the oil filter adapter gasket onto the oil filter bolt
with the smooth side facing the bolt head.
6. Lubricate all the o-rings and the oil filter gasket with clean
engine oil, insert the oil filter bolt through the oil filter
adapter and mount the adapter to the engine block.
Position the adapter for easy removal and replacement of
the oil filters and tighten the oil filter bolt to 50 lb ft (68
Nm).
7. Lubricate the rubber sealing surface on both oil filters and
install the filters on the oil filter adapter. Tighten the oil
filters until the sealing surface contacts the adapter then
3/4 turn tighter.
8. Refill the engine with fresh oil if previously drained, or
top up the oil level if not previously drained and run the
engine until warm while checking for leaks. Your oil
capacity should increase by approximately one quart
(2.8 ml).
CONNECTOR
Accessories 13-35
O - RING