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Breakin Jake Brake Bolts

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 2Much2, Dec 4, 2010.

  1. Dec 4, 2010 #1
    2Much2

    2Much2 Bobtail Member

    21
    1
    Feb 16, 2010
    Steeler Country
    0
    I have 3406e cat 5ek 475. I put the 800hp cam in it and for some reason I keep breaking the hold down bolts. Cat has updated the bolt Im wandering if any one else has had this problem?
     
    2Much2, Dec 4, 2010
    2Much2, Dec 4, 2010
    #1
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  3. Dec 4, 2010 #2
    black_dog106

    black_dog106 Road Train Member

    1,786
    1,666
    Mar 29, 2009
    MA
    0
    Hi 2M2: Dont have an answer for you, but how do you like the cam? Does it take away from your engine brake retarding?... thanks, david
     
    black_dog106, Dec 4, 2010
    black_dog106, Dec 4, 2010
    #2
  4. Dec 5, 2010 #3
    2Much2

    2Much2 Bobtail Member

    21
    1
    Feb 16, 2010
    Steeler Country
    0
    No, I have'nt noticed any difference in the jake. But so far I have broken 8 jake head bolts. Hopefully the new ones will hold up.
     
    2Much2, Dec 5, 2010
    2Much2, Dec 5, 2010
    #3
  5. Dec 5, 2010 #4
    CondoCruiser

    CondoCruiser The Legend

    19,726
    18,734
    Apr 18, 2010
    Tennessee
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    They torque at 80 ft lbs. Are you over torqing?
    Did you change the lifters?
     
    CondoCruiser, Dec 5, 2010
    CondoCruiser, Dec 5, 2010
    #4
  7. Dec 5, 2010 #5
    Don2WS

    Don2WS Medium Load Member

    306
    26
    Feb 26, 2010
    Sturtevant WI
    0
    my MBN broke two of the hold down bolts when it was flashed to 550 when it used to be 435 i took of the jakes and removed the broken bolts and replaced all of them and haven't had trouble, and yeah if you over torque they will break i had to find out the hard way i was planning on replacing the two but broke 3 more during torquing sequence
     
    Don2WS, Dec 5, 2010
    Don2WS, Dec 5, 2010
    #5
  8. Dec 7, 2010 #6
    2Much2

    2Much2 Bobtail Member

    21
    1
    Feb 16, 2010
    Steeler Country
    0
    No, I torqued them to 80. Actually a mechanic put the cam in for me. Then I had to replace bolts on every Jake head. When I replaced these bolts the last time on the #1 Jake head I checked the bolts on the #2 Jake head all were lose exept 1. And I had just fixed them 2 months ago. Thinking about Locktight.
     
    2Much2, Dec 7, 2010
    2Much2, Dec 7, 2010
    #6
  9. Dec 7, 2010 #7
    2Much2

    2Much2 Bobtail Member

    21
    1
    Feb 16, 2010
    Steeler Country
    0
    I wander if they need be repalced when ever you have a jake issue and the jake must be removed?
     
    2Much2, Dec 7, 2010
    2Much2, Dec 7, 2010
    #7
  10. Dec 8, 2010 #8
    ranga

    ranga Bobtail Member

    16
    3
    Nov 16, 2009
    australia
    0
    No the bolts don't have to be replaced everytime but may not be a bad idea. The latest torque that we use is 50nm plus 90 degrees for bolts and 140nm for the nut, if you can get a dealer with full S.I.S access to print out service bulliten No. SEBE8919-Exhaust rocker arm failure, you will have all this info.
     
    ranga, Dec 8, 2010
    ranga, Dec 8, 2010
    #8
    2Much2 Thanks this.
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