Rear main seal replacement

Discussion in 'Small Block Tech' started by Skrilla, Nov 5, 2019.

  1. Skrilla

    Skrilla Member

    Hello everyone,

    I'm in the process of replacing the rear main seal. I'm using the TAP seal and doing it with the motor in the car. I've removed the old rope seal and cleaned it all out. However, when I went to slide the seal into place, it didn't want to go in easily. With light force the seal went in a little, but the block shaved off some of the rubber on the seal, so I didn't try pushing it in anymore. I'm thinking I'm going to need a new seal. Anybody else experience this?

    Thank you
     
  2. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    I use a bit of RTV on the backside of the seal. It acts as a lubricant and then once it’s dry it helps keep the seal in place.
     
    MrSony and Donuts & Peelouts like this.
  3. MrSony

    MrSony Well-Known Member

    Don't forget a lil dab on each end of the cap either.
     
  4. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Where did you get the TAP seal?? What you want is a Ford 460 rear main seal. TA Performance sells them with the little rubber blocks. Or the lcoal auto parts store will have them too.

    The ford part number is:
    D2VE-6701-AA
     
  5. 64 skylark mike

    64 skylark mike Well-Known Member

    When I changed mine, I first had the Ford seal from NAPA. I messed up and installed it backwards soI had to redo it. I ordered the second seal from TA and it was cheaper and included the rubber blocks and pins. Installed it with a bit of Right Stuff and it has held up good for 3 years so far. They both had the exact numbers and names molded on the seal, so the same part from the same manuacturer.
     
  6. Skrilla

    Skrilla Member

    Thanks for the replies.
    I ordered it from TA Performance. I will see if I can pick up the ford 460 seal locally so I don't have to wait.
     
  7. Skrilla

    Skrilla Member

    I ordered TA part number TA1515
    As you can see when I was test fitting it, I lubed it with oil and tried pushing it threw, but it was a very tight fit and with a little pressure, it began to shave of the rubber on the seal.

    unnamed.jpg
     
  8. Jim Nichols

    Jim Nichols Well-Known Member

    It will leak if you don't pull the crank and polish the cross hatch off. The crosshatch on the crank helps the rope seal.
     
  9. gstewart

    gstewart Well-Known Member

    If u have any reason to pull the engine, do it.
    I had to remove the engine to perform some other work. It is so much easier to r/r the rear main. We had to loosen of the crank caps to install the seal. It would not install correctly any other way.
     
  10. Mart

    Mart Gold level member

    I used this from Summit. Crosshatch was ground off. No leaks yet. 1573095532621-690873118.jpg
     
  11. 64 skylark mike

    64 skylark mike Well-Known Member

    My first seal I installed with the engine on a stand, definitely easier. Second was in the car, but the transmission was out. It wasn't too bad because I could take the oil pan out towards the back, and removed the cap and loosened the mains a bit and dropped the back of the crank a little bit, just enough to slide the seal in.
     
  12. Mart

    Mart Gold level member

    Sounds like a pita. Did you pull the pistons down in bores a bit too to get crank to drop? How did you recheck crank endplay? Seems it could change loosening all the main caps.
     
  13. 64 skylark mike

    64 skylark mike Well-Known Member

    To be honest, I didn't think about any of that. I just knew I had to change the seal and made it happen. I only moved it slightly, making just enough clearance to let the seal slide in easier. The end cap has to come out anyway, and the main caps I just loosened the bolts a little, didn't take any of those out. I put end cap and bearing back in same position and re torqued everything. Didn't see how anything would be any different, but I'm a construction guy not an engine builder. My rear seal don't leak anymore, so I'm happy so far.
     
  14. Mart

    Mart Gold level member

    Good repair then!....:)
     

Share This Page