Hummer H1 Service Manual page 76

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12. Install fuel injector lines. Tighten line fittings at pump and
injector to 19 lb-ft (26 N¥m) torque.
13. Install intake manifold and gaskets. Tighten manifold
studs/bolts to 31 lb-ft (42 N¥m) torque. Also install
turbocharger, if equipped.
14. Install engine oil dipstick tube, if removed, and connect
tube to rocker cover bracket.
15. Install water crossover and thermostat housing. Use new
gaskets on crossover and tighten attaching bolts to 25-
37 lb-ft (34-50 N¥m) torque.
16. Install fuel injector line clamps, washers, and nuts.
Tighten nuts to 26 lb-ft (35 N¥m) torque.
17. Install or connect:
¥ glow plugs
¥ fuel pump
¥ temperature sender wire (at head)
¥ ground wires/cables (at rear of head)
¥ wire harness clips and brackets
¥ water valve and bracket
18. Install A/C compressor, power steering pump, and pump
mounting bracket.
19. Install serpentine belt.
20. Install air intake hose and air horn. Be sure gasket is seated
on manifold before tightening air horn bolts.
21. Connect radiator hoses, inlet tube, A/C lines, and fluid
cooler lines.
22. Refill engine cooling system.
23. Connect batteries.
24. Start and run engine. Bleed injectors by loosening line
fittings just enough to purge air. Then tighten fittings and
stop engine.
25. Check and top off engine coolant, engine oil, and
transmission fluid as required.
26. Clear codes and test drive.
Cylinder Head (Right Side)
Removal
1. Remove front console and engine cover.
2. Drain radiator and disconnect batteries.
3. Remove batteries and battery tray.
4. Remove passenger side splash shield.
5. Remove air cleaner, inlet hose, and air horn.
6. Remove surge tank and water valve and hoses.
7. Remove crossover and thermostat housing, inlet tube, and
radiator upper hoses as assembly.
8. Remove serpentine belt.
9. Disconnect and remove alternator, brackets, idler pulley,
and tensioner.
10. Disconnect or remove:
05745159
¥ Glow plug relay and bracket
¥ Engine wire harness clips and ground wires
¥ Passenger side glow plugs and glow plug relay
11. Remove fuel injector line clamps, washers, nuts
12. Remove intake manifold and gaskets. Note attaching stud
and bolt locations for installation reference.
13. Disconnect passenger side fuel injector lines at pump and
injectors, and remove lines. Cover injectors with duct tape
to prevent dirt entry.
14. Remove heat shield and guard. Then remove bolts/nuts
attaching crossover pipe to exhaust manifold.
15. Remove rocker arm cover. Tap cover with rubber mallet to
loosen. Do not pry on cover to remove.
16. Remove rocker arm shaft bolts and retainers. Remove arm
and shaft assemblies individually. Note original position
for assembly reference.
17. Remove pushrods. Note position or rods for installation
reference as they must be installed in original position.
18. Remove cylinder head bolts. Discard bolts as they are not
reusable.
19. Remove cylinder head with aid of helper. Or use chain
hoist, portable hoist, or similar device to lift and remove
cylinder head.
20. Remove cylinder head gasket. Discard gasket; it is not
reusable.
CYLINDER HEAD
GASKET
DOWEL
Figure 2-45: Right Side Cylinder Head Removal/
Installation
21. Refer to cylinder head cleaning and inspection information
if head, valves, valve seats, springs, or seals require
service. Check for warpage. If head was only removed to
replace blown gasket, proceed to installation procedure.
22. Cover cylinder bores and lifter valleys with shop towels.
Engine 2-39
DOWEL