- Joined
- Aug 9, 2020
- Posts
- 77
- Reaction score
- 81
- Location
- US
- First Name
- Mike
- Truck Year
- 1983
- Truck Model
- K20 Suburban
- Engine Size
- 350
I replaced my 83 K20 Suburban power steering system (2 groove, w AC) with all new parts only to discover that most power steering pulleys available are significantly smaller diameter than original.
I noticed the new one was smaller but figured it was no big deal and tossed the old one. Big mistake! The smaller pulley requires a smaller than stock belt which means the PS pump both interferes with the AC and interferes with tightening the AC compressor belt. I got it working, but low end power steering assist is not great and it sure would be nice to be able to use stock belts!
I had to track the OEM part number down using the factory parts manual as all the listings are for the smaller pulleys. Aftermarket (eg Dorman 300-121) have outside diameter between 5.25-5.8 inches.
The original OEM (GM part#14023173) outside diameter is 6.5 inches. That's a big difference!
I noticed the new one was smaller but figured it was no big deal and tossed the old one. Big mistake! The smaller pulley requires a smaller than stock belt which means the PS pump both interferes with the AC and interferes with tightening the AC compressor belt. I got it working, but low end power steering assist is not great and it sure would be nice to be able to use stock belts!
I had to track the OEM part number down using the factory parts manual as all the listings are for the smaller pulleys. Aftermarket (eg Dorman 300-121) have outside diameter between 5.25-5.8 inches.
The original OEM (GM part#14023173) outside diameter is 6.5 inches. That's a big difference!
