Hover over the image to zoom in
Share this:

Felpro O-Ring

Part No. 35126 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

From the leader in aftermarket engine sealing, FEL-PRO the gaskets professionals trust.

Product Features:
  • Each gasket, set, or seal is built to meet or exceed all original equipment specifications and is validated for fit, form, and function
  • Application specific design to ensure a perfect fit and correct operation for unsurpassed quality that you can trust
  • FEL-PRO gasket sets are engineered and manufactured specifically for the aftermarket repair environment
  • Every part for the repair procedure is included in the kit unless otherwise noted
Back To Top

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.

2 Questions | 2 Answers
Displaying questions 1-2
  • Q:

    If a thermostat was replaced without this seal would it make a difference. I put a new thermostat in my
    vehicle but it did not have this seal in the housing when I took it apart.. I did put a new o ring for the filler neck. It does not leak and produces good heat. What is the purpose of the thermostat seal & is it really important. I will tear it apart & put one in if neccesary. Thank you
    Asked on 12/27/2012 by Mike from Andover

    1 answer



      If everything was really clean before you re-assembled the thermostat then a seal (Felpro O-Ring - Part No. 35126) is not required. Sometimes part of the old gasket sticks to the engine and becomes difficult to clean which then results in leak (might require seal in such cases). For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

      Answered on 12/28/2012 by John the Car-Doc from AAP
  • Q:

    which way is up on this gasket - which side goes to the thermostat?
    Asked on 6/17/2010 by mike from columbia heights, mn

    1 answer



      It doesnt appear to have a specific side.

      Answered on 8/8/2010 by skarakis from aap
Displaying questions 1-2

Do you have a question about this product? 

Check out the specials in our monthly flyer.
Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.