Exhaust Manifold; Intake Manifold - Chevrolet 10 1971 Series Chassis Service Manual

ENGINE 6-28
• Oil pressure gauge line (as required).
• Heater hoses at engine connection.
• Fuel line at fuel pump.
• Choke cable at carburetor.
• Accelerator linkage at manifold bellcrank.
• TCS switch at transmission.
7. Connect wires at:
• Coil
• Oil Pressure Switch
• Temperature Switch
• Delcotron
• Starter Solenoid
• CEC Solenoid
8. Complete installations as follows:
• Install the radiator and shroud as outlined in
Section 13.
• Install the hood as outlined in Section 11.
9. Install the air cleaner, connect battery cables, fill
coolling system and crankcase then start engine and
check for leaks.

Intake Manifold

Removal
1. Drain radiator and remove air cleaner.
2. Disconnect:
• Battery cables at battery.
• Upper radiator hose and heater hose at manifold.
• Water pump by-pass at water pump.
• Accelerator linkage at pedal lever.
• Fuel line and choke cable at carburetor.
• Crankcase ventilation lines (as required).
• Spark advance hose and governor line (if so
equipped) at distributor.
3. Remove distributor cap and mark rotor position with
chalk, then remove distributor.
4. Remove (as required) oil filler bracket, air cleaner
bracket, air compressor and bracket, coil, accelera­
tor return spring and bracket, and accelerator
bellcrank.
5. Remove manifold attaching bolts, then remove mani­
fold and carburetor as an assembly. Discard gaskets
and seals.
6. If manifold is to be replaced, transfer:
Carburetor and carburetor mounting studs.
• Temperature sending unit.
• Water outlet and thermostat (use new gasket).
• Heater hose and water pump by-pass adapters.
Installation
1. Clean gasket and seal surfaces on manifold, block,
and cylinder heads.
2. Install manifold seals on block and gaskets on cyl­
inder heads (fig. IV). Use sealer at water passages
and where seals butt to gaskets.
3. Install manifold and torque bolts to specifications in
the sequence outlined on the torque sequence chart.
4. Install (if removed) oil filler bracket, air cleaner
bracket, air compressor and bracket, coil, accelera­
tor return spring
bellcrank.
5. Install distributor, positioning rotor at chalk mark,
then install distributor cap.
6. Connect:
• Spark advance hose and governor line (if so
equipped) at distributor.
• Crankcase ventilation lines (as required).
and bracket and accelerator
• Fuel line and choke cable at carburetor.
• Accelerator linkage at pedal lever.
• Water pump by-pass at water pump (use new
gasket).
• Battery cables at battery.
7. Adjust choke cable
outlined.
8. Install air cleaner.
9. Fill with coolant, start engine, adjust ignition timing
and carburetor idle speed (and mixture on 20-30
series) and check for leaks.

Exhaust Manifold

Removal
1. On vehicles so equipped, remove carburetor heater.
2. On left exhaust manifold, disconnect and remove
Delcotron.
3. On "Mark IV V8" engines, remove spark plugs.
4. Disconnect exhaust pipe from manifold and hang
exhaust pipe from frame with wire.
5. Remove end bolts then remove center bolts and
remove manifold.
Installation
1. Clean mating surfaces on manifold and head, then
install manifold in p o s i t i o n and install bolts
(finger-tight).
2. Torque manifold bolts to specifications.
3. Connect exhaust pipe to manifold. Use new gasket or
packing.
4. On "Mark IV V8"
Torque plugs to specifications.
5. On left exhaust manifold, install and connect Delco­
tron. Adjust belt as outlined in Engine Tune Up.
6. On vehicles so equipped, install carburetor heater.
7. Start engine and check for leaks.
Rocker Arm Cover
Removal
1. Remove air cleaner.
2. Disconnect crankcase ventilation hoses at rocker
arm covers.
3. Disconnect temperature wire from left rocker arm
clips.
4. On vehicles so equipped, remove carburetor heater
from left exhaust manifold.
5. Remove rocker arm cover.
Do not pry rocker arm cover loose.
CAUTION:
Gaskets adhering to cylinder head and rocker
arm cover may be sheared by bumping end of
rocker arm cover rearward with palm of hand
or a rubber mallet.
Installation
1. Clean gasket surfaces on cylinder head and rocker
arm cover with degreaser
gasket, install rocker arm cover and torque to
specifications.
2. Install carburetor heater (if removed).
3. Connect temperature wire at clips on left rocker
arm cover.
4. Connect crankcase ventilation hoses (as required).
5. Install air cleaner, start engine and check for leaks.
and accelerator linkage as
engines, install spark plugs.
then, using a new
10-30 CHEVROLET TRUCK SERVICE MANUAL