Rear Main Repair (16.9 oz.)
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Bars Leak Rear Main Repair (16.9 oz.)

Part No. 1040 Warranty Details  
Most rear main seal leaks are caused by a combination of normal wear in the crankshaft & seal and the drying, hardening and shrinking of the main seal. Bar’s Leaks Concentrated Rear Main Seal Repair restores the seal to like new condition and also contains additives to stop leaks in severely worn seals and crankshafts.
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Base Stock:Severly Hydrotreated Heavy Petroleum Oil
Diesel Compatible:Yes
Intended Treatment Result:Stop Leak
Oil Quantity Treated:6 qt
Recommended Interval:12000 mi
Stops Leaks:Yes
Synthetic Oil Compatible:Yes

REVIEW SNAPSHOT®

by PowerReviews
Bars LeakRear Main Repair (16.9 oz.)
 
3.8

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

71%

of respondents would recommend this to a friend.

Pros

  • Safe (5)
  • Improves vehicle performance (3)
  • Reduces wear (3)
  • Runs clean (3)

Cons

No Cons

Best Uses

  • Quick fix (6)
  • Car (5)
    • Reviewer Profile:
    • Auto enthusiast (6), Casual driver (3)

Reviewed by 8 customers

Displaying reviews 1-8

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(1 of 2 customers found this review helpful)

 
1.0

Didn't work

By 

from New York

About Me Auto Enthusiast, Mechanic, Truck Enthusiast

See all my reviews

Ask me a question

Verified Buyer
3 or more reviews submitted

Pros

    Cons

    • Ineffective

    Best Uses

      Comments about Bars Leak Rear Main Repair (16.9 oz.):

      Rear main seal leak, did not stop the leak.

      (1 of 2 customers found this review helpful)

       
      4.0

      Sure enough.

      By 

      from Jax, Fla

      About Me Auto Enthusiast

      Pros

      • Safe

      Cons

      • Gradual

      Best Uses

      • Quick Fix

      Comments about Bars Leak Rear Main Repair (16.9 oz.):

      Other than fuel injector cleaner, I don't put much stock into additives. I got a notion to suspend the suspected, inevitable rear main seal by trying the proudct. I noticed the leak slowed after the first day. A week later and now there is no sign of the leak. I would highly recommend the product especially for small leaks as mine. I wouldn't say it was a quick fix since it was gradual. Although, it was noticeable after application and over a period of about a week. I believe it took time for the seal to to be worked upon by the product.

      (4 of 5 customers found this review helpful)

       
      5.0

      Bar's products work!

      Pros

      • Runs Clean
      • Safe

      Cons

        Best Uses

        • Car
        • Quick Fix

        Comments about Bars Leak Rear Main Repair (16.9 oz.):

        I have a 1998 Cadillac Seville SLS, Northstar engine. I added this product for preventive maintenance. Prevent maintenance keeps me on the road and away from the mechanic shop. I also use Bar's cooling system treatment products for my cooling system. Have not had any issues since using them.

        (3 of 4 customers found this review helpful)

         
        4.0

        Stopped one, slowed the leak on my other

        By 

        from Rochester NH

        About Me Auto Enthusiast

        See all my reviews

        Ask me a question

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Stops Or Slows Leaks

        Cons

          Best Uses

          • Car
          • Quick Fix
          • RV
          • Truck

          Comments about Bars Leak Rear Main Repair (16.9 oz.):

          Stopped the slow leak on one of my cars, I put in a bottle every other oil change as the leak starts up again near the end of the 2nd oil change. On my other vehicle, which does not get driven much, it has slowed the leak so far (have only driven about 50 miles). I am hopeful that with some more driving it will stop it on this one also.

          (5 of 14 customers found this review helpful)

           
          5.0

          Simple to Use with Excellent Results!!

          By 

          from Virginia Beach, VA

          About Me Casual Driver

          See all my reviews

          Ask me a question

          3 or more reviews submitted

          Pros

          • Improves Vehicle Performance
          • Reduces Wear
          • Safe

          Cons

            Best Uses

            • Car
            • Quick Fix

            Comments about Bars Leak Rear Main Repair (16.9 oz.):

            Straight forward easy to use product. After the recommended 100-150 miles of driving...the leak stopped!
            Super satisfied with the product.

            (6 of 14 customers found this review helpful)

             
            5.0

            THIS STUFF WORKS!

            By 

            from pembroke pines, FL

            About Me Auto Enthusiast, Casual Driver

            See all my reviews

            Ask me a question

            3 or more reviews submitted

            Pros

            • Improves Vehicle Performance
            • Reduces Wear
            • Runs Clean
            • Safe
            • Stop Leaks

            Cons

              Best Uses

              • Car
              • Quick Fix
              • Regular Use
              • RV
              • Truck

              Comments about Bars Leak Rear Main Repair (16.9 oz.):

              This stuffs really works, at first I had my doubts because i used BAR'S stop leak before but not(rear main)and it didnt really seem to work, later the leak seem to have gotten worse so the engine light came on. Well i tired their stop leak rear main, and just after a couple of days driving, the engine light came off and leak was stop.

              (9 of 16 customers found this review helpful)

               
              5.0

              Stopped Rear Main Seal Leak Completely!

              By 

              from Greenville, SC

              About Me Auto Enthusiast, Car Maintainerkeeper, Casual Driver

              Pros

              • Improves Vehicle Performance
              • Reduces Wear
              • Repaired Rear Main Seal
              • Runs Clean
              • Safe
              • Sealed The Other Seal Too

              Cons

              • So Far None

              Best Uses

              • 1994 Toyota Camry
              • Car
              • Quick Fix
              • Regular Use

              Comments about Bars Leak Rear Main Repair (16.9 oz.):

              I have 1994 Toyota Camry, and it had very server leak. I am not a mechanic, but like to learn how to repair and maintain my cars. After fixed oil pan leaks for several times, the leak kept coming back between the end of oil pan and transmission area, and then led me to believe that it was not just the oil pan leak. It must leaked from somewhere else. After detected the server leak source from the rear main seal, decided giving a try with this Bars Rear Main Seal Repair instead of spending thousand dollars to have a mechanic repaired it. After added it to the engine and drove a car for about 100 miles, found the product working. It stops the leak completely, even stops the leaks from the other sources. My car looks cleaner, running smoother and quieter, and found no oil dropping on the ground any more. Thanks for great product and saved me thousand dollars of repair, and will continue to use it as product recommendation and as long as SAVE ME MONEY!

              (5 of 17 customers found this review helpful)

               
              1.0

              BARS LEAKK MAINTAINS THE SEAL LEAK

              By 

              from PA

              About Me Auto Enthusiast, Mechanic

              Verified Buyer
              Helpful Reviewer

              Pros

                Cons

                • Ineffective

                Best Uses

                  Comments about Bars Leak Rear Main Repair (16.9 oz.):

                  HAVE HAD BETTER RESULTS STOPPING LEAKS USING BLACK PEPPER

                  Displaying reviews 1-8

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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.

                  5 Questions | 5 Answers
                  Displaying questions 1-5
                  • Q:

                    will this work if the seal is so bad that i need to replace it. i just bought a truck adn the seal leaked all the oil but dont have the money to have the seal replaced
                    Asked on 11/7/2016 by george from new bedford ma

                    1 answer

                    • CUSTOMER CARE

                      A:

                      I'm happy to help, George! If it is leaking that badly, where all the oil leaked out, it is an indication the leak is too severe for you to seal.

                      Answered on 11/8/2016 by Solomon from AAP
                  • Q:

                    Will this work on a 2002 Chev. Silverado HD 6.0 engine with a OEM silicone
                    rear main seal ???
                    please advise
                    Asked on 7/24/2015 by RD from Helotes Texas

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Yes, RD, the Bars Leak Rear Main Repair (16.9 oz.) (Part No. 1040) will work fine on silicone main seal. The Bar's Leaks 2X Action formula has additives to work on any types of rear main seals, no matter what the material.

                      Answered on 7/24/2015 by Steve from AAP
                  • Q:

                    can u use this in a honda
                    Asked on 1/24/2014 by papi g from west palm beach ,fl

                    1 answer

                    • CUSTOMER CARE

                      A:

                      I'm happy to help! The manufacturer of this product does not specify any brand that the product could not be used with. Most manufacturers do not recommend the use of any additives. For any leaks in your engine I would recommend having a mechanic diagnose the issue and recommend a repair procedure. If you need any help finding a mechanic in your local area, please use our 'Need repair help?' link further down this page.

                      Answered on 1/24/2014 by Heath, ASE Parts Specialist from AAP
                  • Q:

                    will bars rear main seal stop an oil pump leak
                    Asked on 3/28/2013 by jack from alexanderia al.

                    1 answer

                    • CUSTOMER CARE

                      A:

                      The Bars Leak Rear Main Repair -Part No. 1040 is used to stop oil leaks, one bottle treats 4 to 6 quarts of oil. Larger systems use 1 bottle for every 5 quarts of oil capacity. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 3/29/2013 by Max from AAP
                  • Q:

                    can rear main repair by bars leak be uaed in the differential
                    Asked on 8/19/2012 by John from Pa.

                    1 answer

                    • CUSTOMER CARE

                      A:

                      This part Bars Leak Rear Main Repair, Part No. 1040 is Specifically designed to seal rear main leaks, but also works better than a conventional stop leak on all other leaks. This includes the timing cover seal, cam seals, O-Rings and other gaskets. Add entire bottle of Rear Main Seal Repair to engine crankcase at or between oil changes. Do not overfill. DOSAGE: One bottle treats 4 to 6 quarts of oil. Larger systems use 1 bottle for every 5 quarts of oil capacity.
                      For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

                      Answered on 8/20/2012 by Aaron from AAP
                  Displaying questions 1-5

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