Manifold Assembly; Removal; Installation - Chevrolet Light Duty Truck 1973 Service Manual

engine and transmission assembly and install
flywheel to converter bolts.
c. Install converter housing underpan and starter.
d. Connect throttle linkage and detent cable on
Turbo Hydra-Matic.
2. Raise engine and align mounts on engine with
brackets on crossmember - install engine mount
through bolts.
3. Place wood block between oil pan and crossmember
to stabilize power train.
4. Remove floor jack from under crossmember and
position jack pad under transmission assembly,
using wood blocks at jack pad to protect
transmission.
5. Remove the lifting device from engine brackets.
. Roll the power train and suspension assembly
6
under vehicle so that crossmember is aligned with
frame.
7. Slowly lower the vehicle, checking often to assure
that engine components do not interfere with
vehicle as it is being lowered, until suspension to
frame attaching bolt holes are aligned.
. Install and securely tighten suspension to-frame
8
attaching bolts.
9. Install transmission support crossmember, and
remove floor jack from beneath the transmission.
10. Raise vehicle on the hoist and install the remaining
suspension-to-frame attaching bolts - torque bolts-
to-specifications. Torque transmission-to-crossmem-
ber and crossmember to frame bolts to
specifications.
11. Install propeller shaft as outlined in Section 4.
12. Connect rear brake pipe at right fram e-rail
connector; connect front brake pipe at equalizer tee
and connect rear brake pipe at left frame rail
connector.
13. Install and torque shock absorber attaching bolts to
specifications. Connect stabilizer shaft to frame.
14. Install cross shaft and connect clutch linkage and/
or transmission linkage as outlined in Section 7.
15. Connect the following items:
• Fuel line (from tank) at fuel pump.
• Engine ground strap(s).
• Steering idler arm at frame; then steering
pitman arm at steering gear and torque nut to
specifications.
• Battery positive cable at starter.
• Speedometer cable at transmission.
• TCS switch at transmission - install TCS wire to
clip at transmission/clutch housing.
• Install exhaust system.
16. Remove wood block placed between crossmember
and oil pan.
17. Lower vehicle on hoist.
18. Connect accelerator linkage at dash panel mounted
bell crank.
19. Connect Evaporation Control System lines at air
cleaner and at carburetor.
20. Connect TCS system electrical leads at carburetor
mounted CEC valve and at temperature switch -
position harness in rocker arm cover clips.
21. Connect electrical leads at rear of Delcotron.
22. Connect engine wiring harness at dash panel
junction block.
23. Connect oil pressure gauge line if so equipped.
24. Install radiator and fan guard, connect radiator and
heater hoses, install automatic transmission cooler
lines and fill cooling system.
25. Connect battery ground cable at engine block and
at battery.
26. Connect power brake vacuum hose at inlet
manifold fitting.
27. Install engine cover.
28. Bleed front and rear brakes as outlined in Section
5.
29. Start engine, check and add engine coolant as
required and check engine for proper operation.

Manifold Assembly

Removal

1. Remove air cleaner.
2. Disconnect both throttle rods at bellcrank and
remove throttle return spring.
3. Disconnect fuel and vacuum lines and choke cable
at carburetor.
4. Disconnect crankcase ventilation hose at rocker arm
cover.
5. Disconnect exhaust pipe at manifold flange and
discard packing.
. Remove manifold attaching bolts and clamps then
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remove manifold assembly and discard gaskets.
7. Check for cracks in manifold castings.
. Separate manifolds by removing one bolt and two
8
nuts at center of assembly.
9. Disconnect exhaust gas recirculation valve hose.

Installation

1. Clean gasket surfaces on cylinder head and
manifolds.
2. Lay a straight edge along the full length of the
exhaust port faces and measure any gaps between
the straight edge and the port faces. If at any point
a gap of .015 or more exists, it is likely the
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LIGHT DUTY TRUCK SERVICE MANUAL