Check Valve

Disconnect air supply hose at check valve. With engine running above idle speed, listen and feel for exhaust leakage at check valve.
NOTE: A slight exhaust leak at check valve is normal.
If check valve leaks excessively, replace check valve on 4-cylinder engines. Injection manifold must be replaced on other engines since check valve is integral with manifold.

Fig 1: AMC Air Guard System - 4-Cyl. Engines

Courtesy of AMERICAN MOTORS/RENAULT CORP.

Fig 2: AMC Air Guard System - 6-Cyl. Engines

Courtesy of AMERICAN MOTORS/RENAULT CORP.

Fig 3: AMC Air Guard System - V8 Engines

Courtesy of AMERICAN MOTORS/RENAULT CORP.