Chevrolet 10 Series 1968, Service Manual

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ENGINE 6-28
ON TE 40-50-60 SERIES:
• Install rear cab support.
• Connect cab safety lock at rear cab support.
• Install left and right island supports.
• Connect throttle cable at carburetor and retaining
brackets.
• Install radiator surge tank on island support and
connect hoses to surge tank.
• Swing control island rearward and connect to
support.
• Connect emergency brake cable at emergency
brake and retaining brackets.
• Connect choke cable at carburetor and adjust.
• Connect shift linkage at control island.
• Install the radiator, radiator support and shroud
as outlined in Section 13.
ON GE 10-20 SERIES:
• Connect neutral safety switch wire at connector
(as required).
• Install engine splash shields.
ON CE 40-50-60, ME 50-60,
SE 50-60 SERIES:
• Install the front end sheet metal (with hood and
radiator attached) as outlined in Section 11.
ON CE 10-20-30, KE 10-20 SERIES:
• 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
cooling system and crankcase then start engine and
check for leaks.
Intake Manifold
Rem oval
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 fille r 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. 2V). 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 fille r bracket, air cleaner
bracket, air compressor and bracket, coil, accelera­
tor return spring and bracket and accelerator
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).
• 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 and accelerator linkage as
outlined.
8. Install air cleaner.
9. F ill with coolant, start engine, adjust ignition timing
and carburetor idle speed and mixture and check for
leaks.
Exhaust Manifolds
Rem oval
NOTE: On 10 and 20 Series equipped with A ir
Injection Reactor System, disconnect air mani­
fold as outlined in Section 6T. Remove air pre­
heater stove.
1. On vehicles so equipped, remove carburetor heater.
2. On left exhaust manifold, disconnect and remove
Delcotron.
3. On 366, 396 and 427 cu. in. 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 manifild and head, then
install manifold in position and install center bolts
(finger-tight).
2. Install end bolts with french locks, then torque all
bolts to specifications and bend french locks on end
bolts.
3. Connect exhaust pipe to manifold. Use new gasket or
packing.
4. On 366, 396, and 427 cu. in. engines, install spark
plugs. 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 A ir Injection Reactor hose at check valve.
CHEVROLET TRUCK SERVICE MANUAL