Oil Pan Removal - Hummer H1 Service Manual

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2-58 Engine
OIL FILTER
Figure 2-90: Oil Filter and Adapter Removal
OIL PRESSURE
SENDING UNIT
Figure 2-91: Oil Pressure Sending Unit Location

Oil Pan Removal

1. Drain oil from pan if not previously done.
2. Remove pan bolts.
3. Tap pan with rubber mallet to loosen. Then remove pan.
4. Remove pan rear seal (Figure 2-92). Discard seal.
SEAL
ADAPTER
SEALS
WASHER
BOLT
STUDS
OIL PAN
Figure 2-92: Oil Pan Removal
Oil Pump and Drive Removal
1. Remove nut from pump mounting stud (Figure 2-93).
2. Loosen bracket clamp screw and rotate bracket off
mounting stud.
3. Remove pump mounting stud.
4. Lift and remove pump and pump shaft.
5. Remove oil pump drive clamp.
6. Lift and remove oil pump drive from block (Figure 2-94).
7. Remove and discard pump drive gasket.
Figure 2-93: Oil Pump Removal/Installation
DRAINPLUG
GASKET
SEAL
MOUNTING
BOLT
OIL PUMP
SHAFT
RETAINER
PUMP DRIVE
SHAFT
®