Chevrolet 1991 Light Duty Truck Repair Manual page 387

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• Intake manifold bolts to 34 N-m (25 ft. lbs.).
4. Vacuum lines and electrical connectors, as need­
ed.
EXHAUST MANIFOLD
INSTALLATION
E Install or Connect (Figure 57)
1. Exhaust manifold and a new gasket.
2. Exhaust manifold bolts and washers.
Tighten
• Exhaust manifold bolts. Use the tightening
sequence and the specifications shown in fig­
ure 57.
3. Oxygen sensor wire.
4. Thermae heat stove pipe.
FLYWHEEL INSTALLATION
Install or Connect (Figure 4)
1. Spacer (68).
2. Flywheel (67).
3. Bolts (66).
Tighten
• Flywheel bolts (66).
— Automatic transmissions: 75 N-m (55 ft.
lbs.).
— Manual transmissions: 90 N-m (65 ft. lbs.).
2.5L L4 ENGINE 6A1-29
ENGINE ACCESSORY
INSTALLATION
Install the engine accessories (distributor, TBI unit oil
filter, generator, etc.) as directed in the proper Truck
Service Manual. Connect all vacuum hoses and electri­
cal equipment the same way as removed.
ENGINE SETUP AND
TESTING
1. After overhaul, the engine should be tested before
installing it in the vehicle. If a suitable test stand is
not available, the following procedure can be used
after the engine is installed in the vehicle.
2. Fill the crankcase with the proper quantity and
grade of oil. The crankcase takes 3 quarts (2.8
liters) of oil. With filter it takes 3.5 quarts (3.3 liters)
of oil.
3. Fill the cooling system with the proper coolant 11.5
quarts (11 liters).
4. With the ignition "OFF" or disconnected, crank
the engine several times. Listen for any unusual
noises or evidence that any parts are binding.
5. Start the engine and listen for unusual noises. Run
the engine at about 1000 rpm until the engine is at
operating temperature.
6. Listen for improperly adjusted valves or sticking
lifters, or other unusual noises.
7. Check for oil and coolant leaks while the engine is
running.
8. Using the proper Truck Service Manual or Emis­
sion Control Label for specifications, adjust the
ignition timing and idle rpm.