Small Car, Crowded Engine:

Moving The A/C Compressor
For Easier Removal Of The Fan Shroud

1999 GMC Jimmy or Chevy Blazer

 

In This Article:

The air intake ducting is dismantled, the throttle cable bracket is removed, and serpentine belt removed. The air conditioning compressor is unbolted, lifted up and a block of wood placed underneath. The radiator fan shroud is removed.

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Skill Level: 2-3 (Basic to Intermediate) Time Taken: About 20 Minutes

By Bruce W. Maki, Editor

Start:

When replacing the water pump on a 1999 GMC Jimmy, I had difficulty removing the upper radiator shroud. The air conditioning hoses are directly above the shroud and I had to severly bend these hoses to pull the shroud out. I decided to unbolt the a/c compressor and raise it higher so the lines wouldn't get damaged.

Identifying The Air Conditioning Compressor:

  • 1: Air conditioning compressor.
  • 2: A/C hoses.
  • 3: Radiator shroud.

Note the pair of small black lines making a half-circle next to the compressor. These are the throttle cables, and they need to be unbolted to allow the compressor to be moved.

Identifying the air conditioning compressor.

 

Air intake ducting, 1999 GMC Jimmy.

Removing The Intake Air Ducting:

  • I removed the wing-nut A. This can be removed by hand.
  • I loosened the band clamp B with a 5/16" nutdriver.
  • I unscrewed four screws (C) that secure the cover for the air filter. These require a large (#3) Phillips screwdriver, but can also be removed by hand.

 

From the driver's side of the car, I disconnected:

  • Two electrical connectors (D)
  • A cable clamp (E), by opening it with a small screwdriver.
  • A vacuum hose (F). This just pulled off.
Electrical connectors, air intake ducting.

 

When removing this part of the air ducting, it must be lifted at the back and rotated upwards.

There are a pair of prongs under the front edge that grab the throttle body.

 

There were two nuts securing this bracket that held the throttle cables and a wiring harness.

I removed these nuts with a 10mm socket and lifted the bracket up.

Fastener locations, throttle bracket.

 

Removing serpentine belt, 1999 GMC Jimmy.

Removing The Serpentine Belt:

To remove the serpentine belt, the automatic belt tensioner must be rotated to relieve the tension on the belt.

To rotate the tensioner, I inserted a 3/8" drive ratchet into the square hole and pushed the ratchet to the left (arrow). Then I slipped the serpentine belt off the idler pulley.

I found it best to start with the ratchet handle straight up, because when the belt is removed the tensioner will rotate back, and the wrench handle can hit the water pump pulley, making it impossible to remove the wrench.

 

The arrows indicate the locations of the four bolts that hold the compressor to the bracket. I removed these bolts with a 13mm socket.

Note that I also unplugged the electrical connection to the compressor, which is the blue thing just behind the pulley.

A/C compressor bolt locations.

 

Raising a/c compressor with block of wood. Then I lifted the compressor up and placed a block of wood underneath. I used a scrap of 4"x4" post, but a couple pieces of 2x4 or 2x6 would work just as well.

 

With the a/c compressor unbolted, I could lift up the a/c hoses without kinking them. Getting the shroud out was much easier, and worth the extra 20 minutes of work. Removing fan shroud, 1999 GMC Jimmy.

 

More Info:

Tools Used:

  • Basic Mechanic's Tools
  • Sockets: 10mm, 13mm
  • Nutdriver, 5/16"
  • #3 Phillips Screwdriver
  • Small Flat Screwdriver

Materials Used:

  • Block Of Wood

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© Copyright 2008 Maki Media Group LLC

Written March 7, 2008