Air Conditioning Bypass Pulley
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Dorman - Help Air Conditioning Bypass Pulley

Part No. 34178 Warranty Details  

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Now there’s an affordable way to get your vehicle up and running after a seized A/C compressor renders it inoperable. Our A/C Compressor By-Pass Pulley is installed in place of a new compressor.

Product Features:
  • Significantly cuts costs by eliminating the need for a new A/C compressor
  • Uses original length serpentine belt
  • Lightweight for easy handling
  • Rigorous quality control measures have been undertaken to ensure that this part conforms to product standards
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Compressor Type:LTR4
Groove Quantity:7-Groove Serpentine Belt
Material:Plastic Pulley, Aluminum Bracket
Mounting Bracket Included:Yes
Mounting Hardware Included:Mounting Bolts, Spacers, Washer
New Or Remanufactured:No
Pulley Outside Diameter:130 mm
Pulley Quantity:1
Pulley Type:7-Groove Serpentine Belt
Remanufactured:No

REVIEW SNAPSHOT®

by PowerReviews
Dorman - HelpAir Conditioning Bypass Pulley
 
3.4

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (0)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (4)

Cons

No Cons

Best Uses

  • Everyday driving (3)
  • Replacement (3)
    • Reviewer Profile:
    • Mechanic (3)

Reviewed by 5 customers

Displaying reviews 1-5

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4.0

Good product but wrong bolts

By 

from Chillicothe, Ohio

About Me Auto Enthusiast, Casual Driver, Mechanic

Pros

  • Durable
  • Easy To Install
  • Good Quality
  • Improves Engine Efficiency
  • Increases Power
  • Lightweight

Cons

  • Wrong Bolts

Best Uses

  • Everyday Driving
  • Replacement

Comments about Dorman - Help Air Conditioning Bypass Pulley:

Everything was great except that they included metric bolts and mine needed standard NC bolts. So I used some that I had.

(1 of 1 customers found this review helpful)

 
4.0

This pulley came in handy and it worked.

By 

from St. Louis, Mo

About Me Mechanic

Verified Buyer

Pros

  • Easy To Install

Cons

  • It May Be A Little Pricey

Best Uses

  • Everyday Driving
  • Replacement

Comments about Dorman - Help Air Conditioning Bypass Pulley:

the part came in handy when I was in a bind. It worked great and got me through til I can buy the compressor. I would recommend this product to anyone.

(2 of 4 customers found this review helpful)

 
3.0

In the end it worked but get some bolts

By 

from Mid Ga

About Me Auto Enthusiast, Casual Driver, Mechanic

See all my reviews

Ask me a question

3 or more reviews submitted

Pros

  • Worked in a pinch

Cons

  • Hardware included wrong

Best Uses

  • TEMPORARY REPLACEMENT

Comments about Dorman - Help Air Conditioning Bypass Pulley:

This thing is ok. It works in the end and was pretty easy to install. It gets my neighbor by until he can buy a new AC compressor.
The bolts included are metric and will ruin the mounting bracket for future use with a AC compressor. Pick up (3) 5/16's x 18 1.5" bolts, (3) flat washers and (3) lock washers for the install and you are golden. They cost me $1.10 at the hardware store.
Center the bracket with the holes before you tighten them

 
3.0

better if had the correct style bolts

By 

from wilmington ohio

Pros

  • Easy To Install
  • Lightweight

Cons

    Best Uses

      Comments about Dorman - Help Air Conditioning Bypass Pulley:

      give you metric bolts to replace sae bolts with just dont work my old bolts were 5/16 that held the compressor in

      • Car & Truck:
      • Casual Driver, Truck Enthusiast

      (0 of 1 customers found this review helpful)

       
      3.0

      If you Align the pulley it works great.

      By 

      from Louisiana

      See all my reviews

      Verified Buyer
      Helpful Reviewer

      Pros

      • Durable
      • Easy To Install

      Cons

      • No Improvement In Performance

      Best Uses

      • Everyday Driving
      • Replacement

      Comments about Dorman - Help Air Conditioning Bypass Pulley:

      The product worked well for what I used it for. A temporary replacement for my air conditioner. It musr be watched because it slowly moved. With only 3 bolts supporting it the pulley must be aligne perfectly with te other pulleys. Would not reccomend for prolonged use.

      • Car & Truck:
      • Mechanic

      Displaying reviews 1-5

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      Do you have questions about this product?

       

      Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

      6 Questions | 7 Answers
      Displaying questions 1-6
      • Q:

        do I have to remove ac. compresser first if so does hoses come off or 1 bolt on top leave hoses on is any instruction video
        Asked on 8/29/2014 by harold from brookville pa.

        1 answer

        • CUSTOMER CARE

          A:

          Hi Harold, to further assist for the part number 34178, please provide us the year, make, model and engine size of your vehicle.

          Answered on 8/30/2014 by Steve from AAP
      • Q:

        My compressor not siezed up yet. Is there any symptoms or noises that warns you of seizing up?
        Asked on 1/9/2011 by Anonymous

        2 answers

        • CUSTOMER CARE

          A:

          You may hear some odd noise coming from the compressor but there is really no way to detect it before it locks up.

          Answered on 1/11/2011 by Mike the Auto Parts Master from AAP
        • A:

          A lot of smoke then your also out a belt!

          Answered on 6/21/2013 by WOODY from Silver Creek, GA
      • Q:

        how do i replace compressor with bypass pulley?
        Asked on 12/23/2010 by Anonymous

        1 answer

        • CUSTOMER CARE

          A:

          Remove the compressor completely from the car and use the compressor mounting holes to mount this.

          Answered on 12/24/2010 by Mike the Auto Parts Master from AAP
      • Q:

        If installed, does it use the same belt or does another belt have to be purchased.
        Asked on 10/29/2010 by Alan from Clarion, PA

        1 answer

        • CUSTOMER CARE

          A:

          You should be able to use the same belt with no problem.

          Answered on 10/29/2010 by Mike the Auto Parts Master from AAP
      • Q:

        My compressor seized up, do I need to use this part if I pull the compressor or can I just replace the belt with one for a truck with no ac
        Asked on 10/13/2010 by Anonymous

        1 answer

        • CUSTOMER CARE

          A:

          You will have to take off the compressor

          Answered on 10/13/2010 by Mike from AAP
      • Q:

        Does bypassing the a/c compressor effect the vehicles ability to use the heat as well?
        Asked on 8/28/2010 by Tom from nj

        1 answer

        • CUSTOMER CARE

          A:

          No it will not effect the vehicle's ability to use heat.

          Answered on 8/28/2010 by Kevin from AAP
      Displaying questions 1-6

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