The compact, all-metric General Motors (Delco Air) DA-6 6-cylinder compressor weighs less than 12 1/2 pounds and is only 9 1/4 inches long. Its combination drive shaft and axial plate drives 3 double-acting pistons back and forth in their 6 cylinders - 3 at each end. See Fig 1 .

The cylinder assembly and both compressor heads are made of die-cast aluminum. The compressor has no oil slump, but holds additional oil when the cycling clutch disengages.

The discharge (high pressure) side is in the compressor center cavity, and the suction (low pressure) side is in the outside cavity. Discharge crossover is a drilled hole in both front and rear heads.

All vehicles, equipped with the DA-6, use the same compressor. Variations, however, occur in mounting bracket (front head) position on cylinder assembly, and in drive systems, pulleys, connections, and system capacities.

Fig 1: Exploded View of General Motors DA-6 6-Cylinder Compressor (Components of center cylinder and piston assembly are non-serviceable, and must be replaced as an assembly.)

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

A/C Compressor Overhaul - DA-6: Description

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?