On an automotive engine, to replace the A/C compressor, a free spinning pulley referred to as an A/C compressor bypass pulley can be used. In some vehicles, when a compressor goes bad, the owner will choose this option. The reason is, compared to a new A/C compressor, bypass pulleys are cheaper. Unfortunately, the vehicle will no longer have air conditioning once it’s installed.
Whether or not the installation of a bypass pulley is a good idea for your vehicle is something you can discuss with a dealer, certified automotive technician, etc. On the assumption that you’re interested in installing an A/C compressor bypass pulley, here is some information.
Freon should be removed from the air conditioning system of your vehicle before you install a bypass pulley.
- Open and prop up the hood of your vehicle.
- Take careful note of where each pulley is located. With pen and paper, sketch out the layout, as well as in what manner the belt wraps around.
- To the corresponding belt tension or fitting, attach the belt tensioner tool.
- By rotating the tool, release the tension on the belt. Set the belt aside after removing it from around each pulley (while keeping the tension off the belt).
- Now, back to its natural position, let the tensioner settle and set aside the belt tensioner tool.
- Find the two A/C compressor lines. Use a line wrench set to remove them. Back to their connecting point, follow the lines and remove them with the line wrench set.
- Locate and loosen the A/C compressor mounting bolts with a ratchet set and socket.
- With one hand, support the A/C compressor. You can then remove the mounting bolts. The A/C compressor can then be set aside.
Compressor Bypass Pulley Installation
It’s time to install the bypass pulley now.
- With the proper engine mounting holes, line up the A/C bypass pulley mounting holes. (We are referring to the A/C compressor holes that were being used by the compressor.) Use your ratchet set and socket to install the mounting bolts. First, tighten them by hand, then snug them up.
- It’s time to check the serpentine belt for wear, cracks, etc. If necessary, replace the belt.
- Refer to your sketched diagram. Around the pulley system, properly replace/route the belt. Except for the tensioner pulley, around all other pulleys, the belt should rest loosely.
- To the belt tensioner, you should now attach the belt tensioner tool. By applying pressure to the tool, rotate the tensioner. Under the belt tensioner, you can now slide the serpentine belt.
- The tensioner tool pressure can now be slowly released. Eventually, the belt should be drawn tightly as it sits on the pulley returning to its original position.
- Once this has been accomplished, from the belt tensioner, you can remove the belt tensioner tool.
R & Y A/C Compressors® Carries A/C Compressors and Much More
Rather than bypassing your system and going without air-conditioning, you may choose to replace the compressor in your vehicle’s AC system. When you need compressors, accumulators, valves, condensers, evaporators, and other A/C parts and components – before you shop anywhere else – check out the inventory at R & Y A/C Compressors®. We have the items you need, and we will ship them in an expedited fashion. Contact us at 305-919-8864 today.