Engine Cooling Fan - Snapping/Cracking Noise

86chevy02

Number: 84-268

Section: 6B

Date: SEPT., 1986
Subject: ENGINE COOLING FAN

Model and Year: 1982-84 S/T TRUCKS - ALL ENGINES

TO: ALL CHEVROLET DEALERS

Circular Plastic Fan Blade Assembly:

Engine Cooling Fan:

Some 1982-1984 S/T Trucks that were produced with the circular plastic fan blade assembly as shown in Figure No. 1, may experience a "snapping" or "cracking" type noise from the fan assembly during engine acceleration. If this condition is encountered, the fan blade assembly must be replaced with the type shown in Figures No. 2, No. 3 and No. 4.
Use the following chart to determine which replacement parts are required. Fan replacement procedures are listed in section 6B of the Light Duty Service manual.

CAUTION: Do not stand in line with any rotating fan assembly while the engine is in operation.

Do not use or repair a damaged fan assembly. An unbalanced fan may fly apart and cause personal injury and/or property damage. Replace any damaged fan assemblies with new assemblies.