Table of Contents
Advertisement
AIR INJECTOR REACTOR SYSTEM 6T-4
Air injection Tube
Inspection (Fig. 5)
•
There is no periodic service or inspection for the
air injection tubes, yet on In Line engines whenever
the cylinder head is removed or on V8 engines when-
ever the exhaust manifolds are removed, inspect the
air injection tubes for carbon build up and warped or
burnt tubes.
•
Remove any carbon build up with a wire brush.
•
Warped or burnt tubes must be replaced.
Replacement
•
On In Line engines remove carbon from tubes and
using penetrating oil, work tubes out of cylinder
head.
•
On V8 engines clamp exhaust manifold in a vise,
remove carbon from tubes and using penetrating oil,
work tubes out of manifold.
• Install new tubes in cylinder head or manifold.
Air Injection Pump
Inspection
Accelerate engine to approximately 1500 KPM and
observe air flow from hose.Osf). If air flow increases as
engine is accelerated, pump is operating satisfactorily.
If air flow does not increase or is not present, proceed
as follows:
•
Check for proper drive belt tension.
•
Check for a leaky pressure relief valve. Air maybe
heard leaking with the pump running.
NOTE:
The Air Injection Reactor System is
not completely noiseless. Under normal condi-
tions noise rises in pitch as engine speed in-
creases. To determine if excessive noise is the
fault of the Air Injection Reactor System, oper-
ate the engine with the pump drive belt removed.
IN LINE
INJECTION
si
AIR AAANIFOLD^
ASSEMBLY
AIR MANIFOLD
ASSEMBLY
^ S
~jk
VALVE
V-8
ff
>yi
INJECTION
»
T U B E
'
,•
Fig. 5—Air Injection Tube (Typical)
Fig. 6-HRemoving Pressure Relief Valve
If excessive noise does not exist with the belt
removed proceed as follows:
Check for proper installation of relief valve silencer
on L-6 and 283, 327, 350 cu. in. V-8 engines.
Check for a seized Air Injection Pump.
Check hoses, tubes, air manifolds and all connec-
tions for leaks and proper routing.
Cheqk carburetor air cleaner for proper installation.
Check air injection pump for proper mounting.
If none of the above conditions exist and the air in-
jection pump has excessive noise remove then repair
as outlined in the Overhaul Manual.
Replacement
Disconnect, t&e hoses at the pump.
Remove pump pulley as outlined.
Remove pump mounting bolts and remove pump.
Install pump with mounting bolts loose.
Install pump pulley as outlined.
Install and adjust belt as outlined.
Connect the hoses at the pump.
Pressure Relief Valve Replacement
1. Using J-7055-5 and J-6585 pull relief valve from
housing (fig. 6).
2. Using a 15/16" socket tap the relief valve into hous-
ing until the valve shoulders on the housing (fig. 7).
CAUTION:
Use extreme care to avoid distort-
ing housing.
NOTE: Various length pressure setting plugs
(fig. 8) designed for the particular requirements
of vehicle - engine combinations, determine the
CHEVROLET CHASSIS SERVICE MANUAL
Advertisement
Table of Contents
