Hummer H1 (1992-1998). Manual - part 23

2-27. OIL PUMP REPAIR (Cont’d)

2-81

2-28. OIL FILTER ADAPTER AND OIL PRESSURE SENDING UNIT REPAIR

This task covers:

a. Cleaning

b. Inspection

INITIAL SETUP

Tools

Equipment Condition

General mechanic’s tool kit

Engine disassembled into subassemblies

automotive (Appendix E, Item 1)

(para. 2-15).

Manual References

Clean all components in accordance with para. 2-9.

NOTE

For general inspection instructions, refer to para. 2-10.

1. Inspect adapter bolt (2) for damaged threads. Replace if threads are damaged.

2. Inspect adapter reducer (3) for damaged threads. Replace if threads are damaged.

3. Inspect adapter (1) for damage. Replace adapter (1) if damaged and remove adapter reducer (3)

for reuse.

4. Inspect fitting (5) for damage. Replace if damaged.
5. Inspect oil pressure sending unit (4) for damage. Replace if damaged.

2-82

Change 1

2-83

2 - 2 9 . EXHAUST MANIFOLD REPA I R

This task covers:

a.

Cleaning

b.

Inspection

Equipment Condition

Engine disassembled into subassemblies
(para. 2-15).

a. Cleaning

b. Inspection

NOT E

For general inspection instructions, refer to para. 2-10.

Inspect exhaust manifold (1) for damage. Replace if damaged.

Clean exhaust manifolds (1) in accordance with para. 2-9.

INITIAL SETUP:

Tools

General mechanic’s tool kit:

automotive (Appendix E, Item 1)

Manual References

NOT E

There is no repair to exhaust manifold and it must be replaced 
if damaged.

LEFT TURBO EXHAUST MANIFOLD SHOWN

LEFT EXHAUST MANIFOLD SHOWN

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2 - 3 0 . I N TAKE MANIFOLD REPA I R

This task covers:

a.

Cleaning

b.

Inspection

Manual References

Equipment Condition

Engine disassembled into subassemblies
(para. 2-15).

a. Cleaning

b. Inspection

NOT E

• For general inspection instructions, refer to para. 2-10.
• For turbocharged engines, perform step 1 only.

1.

Inspect intake manifold (1) or intake manifolds (4) and center intake manifold (3) for damage.
Replace if damaged.

2.

Inspect nipple (2) for damage. If damaged, replace nipple (2) using sealing compound.

Clean intake manifold (1) or intake manifolds (4) and center manifold (3) in accordance with para. 2-9.

INITIAL SETUP:

Tools

General mechanic’s tool kit:

automotive (Appendix E, Item 1)

Materials/Parts

Sealing compound (Appendix B, Item 18)

TURBO ENGINE