Table of Contents
Advertisement
6E-20
1977 PONTIAC SERVICE MANUAL
Fig.
6E-33
A.I.R. Filter Removal
A.I.R. HOSES AND TUBES
lnspection
1. Inspect all hoses for deterioration or holes.
2. Inspect all tubes for cracks or holes.
3. Check all hose and tube connections.
4. Make repairs or replace parts as needed.
5. Check all tube and hose routing. Interference may
cause wear.
6. If leak is suspected on the pressure side of the system
or any tubes and/or hoses have been disconnected on the
pressure side, the connections should be checked for leaks
with soapy water solution.
7. With the pump running, bubbles will form if a leak
exists.
Remove
To replace any hose and/or tube, note routing then
remove hose(s) and/or tube($ as required.
Install
1. Install new hose@) and/or tube($, routing them as
when removed.
2. Tighten all connections.
CHECK VALVE
lnspection
1. The check valve should be inspected whenever the
hose is disconnected from the check valve or whenever check
valve failure is suspected. (A pump that had become
inoperative and had shown indications of having exhaust
gases in the pump would indicate check valve failure.)
2. Blow through the check valve (toward the cylinder
head) then attempt to suck back through check valve. Flow
should only be in one direction (toward the exhaust manifold)
Replace valve which does not function this way.
Replace
Disconnect pump outlet hose at check valve. Remove
check valve from pipe assembly, being careful not to bend or
twist the assembly.
DIVERTER VALVE AND SILENCER
ASSEMBLY
lnspection
1. Check condition and routing of all lines especially the
signal line. All lines must be secure, without crimps and not
leaking. Replace deteriorated lines.
2. Disconnect signal line at valve. A vacuum running.
3. Check diverter valve attaching screws for tightness.
Screws should be torqued to 85 lb. in.
4. Defective valves should be replaced (see Functional
Test).
Remove
1. Disconnect vacuum signal line. Disconnect valve
outlet hose.
2. Remove diverter valve from pump or elbow.
Install
1. Install diverter valve to pump or elbow with new
gasket. Torque valve attaching screws to 85 lb. in.
2. Install outlet and vacuum signal hoses and check
system for leaks.
A.I.R. PUMP
lnspection
Accelerate engine to approximately 1500 rpm and
observe air flow from hose(s). 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:
1. Check for proper drive belt tension.
2. Check for a leaky pressure relief valve. Air may be
heard leaking with the pump running.
NOTE: The A.I.R. System is not completely noiseless.
Under normal conditions, noise rises in pitch as engine
speed increases. To determine if excessive noise is the
fault of the Air Injection Reactor System, operate the
Advertisement
Table of Contents
