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  •  » Got my rear end exposed!

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    6/30/2019 11:32 AM  #1

    terry
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    From: vandalia, illinois
    Registered: 4/01/2013
    Posts: 1,875

    Got my rear end exposed!

    WHAT??  I took my transmission out and have the rear main exposed, have the new seal.  Question, I know you have to lube the inner part of the seal before installing it. BUT, do I used anything on the outside of the seal?  Like rtv or just oil it or just shove it in there DRY???

    Last edited by terry (6/30/2019 11:33 AM)

     

    6/30/2019 1:13 PM  #2

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,526

    Re: Got my rear end exposed!

    I would see what the manufacturer recommends.  FelPro, etc. usually have instructions on their website if the seal didn't come with any.  I would really look the crank over too, see if it has a wear groove in it and requires a sleeve.  One piece RMS rarely leak unless the engine has a lot of miles on it. 

    If you do use RTV I'd give it a full 24 hours to cure before filling he crankcase.  I've had consistently better lasting sealing from RTV doing that. 

     

    6/30/2019 5:04 PM  #3

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,299

    Re: Got my rear end exposed!

    Did that job on my 90 Fox convertible many years ago.  Turned out to be a massive valve cover leak.
    I stuck some grease on the OD of the seal as well as oiled the seal surface.  Don't know if right or wrong, but it never leaked.  The important thing is using a driver that fits the seal 100% so you don't bend the seal.  Check out all your old schedule 40 pipe unions.  I think a big'un fits it pretty good.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    6/30/2019 6:19 PM  #4

    Steve69
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    From: Madison Wisconsin
    Registered: 4/01/2013
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    Re: Got my rear end exposed!

    I used a oil filter tool cup and pounded it in my sons 5.8.  I put RTV around the outside of the seal after is was in so it was flush and smooth. After I installed the pan I did the same thing.

     

    6/30/2019 7:07 PM  #5

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,874

    Re: Got my rear end exposed!

    Never done it unless engine was dis-assembled and on stand.
    Don't chew hafta remove the rear main bearing saddle or sump'thin?
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    6/30/2019 9:02 PM  #6

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,526

    Re: Got my rear end exposed!

    Nope, not for a 1 piece. 

     

    7/01/2019 9:01 AM  #7

    Tubo
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    From: Ft. Walton Beach, Florida
    Registered: 4/01/2013
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    Re: Got my rear end exposed!

    Terry there is that You Tube video on remove/replace one piece 302 main seal, find the one that shows how to convert a PVC pipe cap into a seal driver.
    Might find some who'd disagree, however I'd apply a very thin coat of Permatex to the seal before seatiing.
    Glad Ya got the tranny out.

    Tubo

    If it ain't broke, I haven't modified it Yet
     

    7/02/2019 5:35 AM  #8

    terry
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    From: vandalia, illinois
    Registered: 4/01/2013
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    Re: Got my rear end exposed!

    I got the seal installed and decided to re do the oil pan gasket while it was all exposed.  Have to pick up new gasket and RTV today and hope to start reassembly tonight.

    When I put the flywheel bolts back on should I use something on the threads?  It appears there was something on them when I took them off but cant tell what it is.

       •Thread Starter
     

    7/02/2019 5:51 AM  #9

    Jim Bowie
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    From: Mequon Wis
    Registered: 4/08/2013
    Posts: 261

    Re: Got my rear end exposed!

    Pretty sure crank is drilled and threaded right threw, so you have to seal bolts or or have another slight oil leak.

     

    7/02/2019 3:49 PM  #10

    50vert
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    From: QLD Australia
    Registered: 4/01/2013
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    Re: Got my rear end exposed!

    What Jim said .... plus sealer on the two rear large pan bolts.

    "Those telephone poles were like a picket fence"
     

    7/02/2019 7:57 PM  #11

    HudginJ3
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    From: Cedar Hill, TX
    Registered: 4/29/2015
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    Re: Got my rear end exposed!

    Not RTV

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

    7/02/2019 8:10 PM  #12

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,347

    Re: Got my rear end exposed!

    Terry I used Permatex High Temperature Thread Sealant (Item #59214) on my threads.  Looks like hi temp pipe dope to me in a small tube.  Hope this is helpful.

     

    7/03/2019 9:48 AM  #13

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,299

    Re: Got my rear end exposed!

    Right. The flywheel bolts need sealant. Apply to the BOLT THREADS, not the female threads in the hole, so you don’t push goop into the inside of the engine. 351w has blind holes, so not needed on those. 289, 302, 5.0 have holes open to the crankcase.

    In reality, darn near any type sealer or rtv will work for this. Just get all the old oil off both threads first.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

     

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