Operational Checks - Belt Driven Air Pump

AIR System (Type 1 -Belt Drive Air Pump- With V08 Option):

OPERATIONAL CHECKS
AIR Pump (Belt Driven)
The Air Injection Reaction (AIR) air pump is a positive displacement vane type which is permanently lubricated and requires no periodic maintenance.

NOTE: If the engine or underhood compartment is to be cleaned with steam or high-pressure detergent, to prevent possible damage to the AIR pump, the centrifugal filter fan should be masked off to prevent liquids from entering the pump.

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:

Inspect
1. For drive belt condition and proper tension.
2. For a leaky pressure relief valve. Air may be heard leaking with the AIR pump running.

Important: The AIR 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 pump, operate the engine with the pump drive belt removed. If excessive noise does not exist with the belt removed proceed as follows:

3. For a seized AIR pump.
4. Hoses, tubes and all connections for leaks and proper routing.
5. For air flow from secondary AIR bypass valve.
6. AIR pump for proper mounting and bolt torque.
7. If no irregularities exist and the AIR pump noise is still excessive, remove and replace pump.

Important: Do not oil AIR pump as damage may result.