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Turbo-Manifold Gasket Failure

Discussion in 'Trucks [ Eighteen Wheelers ]' started by D389, Dec 17, 2013.

  1. Dec 17, 2013 #1
    D389

    D389 Light Load Member

    99
    56
    Mar 24, 2013
    Texas Panhandle
    0
    What causes the gasket between the turbo and manifold to blow out? Two trucks where I work have rolled back in like this, an N-14 celect+ and a 6nz. Both had one broken stud and the gasket burned away. The cat had the turbo replaced 11mo ago and it was torqued correctly and everything. I can't speak for the n-14. Any ideas?
     
    D389, Dec 17, 2013
    D389, Dec 17, 2013
    #1
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  3. Dec 17, 2013 #2
    allan5oh

    allan5oh Road Train Member

    1,557
    556
    Jan 6, 2010
    Winnipeg, mb
    0
    Could be lots of things. Excessive back pressure, plugged muffler, excessive heat, old studs breaking, uneven/warped clamping surfaces, substandard gaskets.
     
    allan5oh, Dec 17, 2013
    allan5oh, Dec 17, 2013
    #2
  4. Dec 17, 2013 #3
    puncher

    puncher Medium Load Member

    540
    358
    Feb 12, 2010
    Tn.
    0
    Did you use new OEM turbo bolts and nuts ? Never reuse old bolts or average bolt bin bolts.
     
    puncher, Dec 17, 2013
    puncher, Dec 17, 2013
    #3
  5. Dec 17, 2013 #4
    D389

    D389 Light Load Member

    99
    56
    Mar 24, 2013
    Texas Panhandle
    0
    They were oem. I leaned that the driver in this last truck liked to lug it. I'm going to assume that the heat got to it.
     
    D389, Dec 17, 2013
    D389, Dec 17, 2013
    #4
    puncher Thanks this.
  7. Dec 17, 2013 #5
    beltrans

    beltrans Medium Load Member

    441
    101
    Nov 26, 2008
    spokane wa
    0
    uneven/warped clamping surfaces
     
    beltrans, Dec 17, 2013
    beltrans, Dec 17, 2013
    #5
  8. Dec 17, 2013 #6
    JohnP3

    JohnP3 Road Train Member

    1,594
    684
    Feb 21, 2010
    Rock Creek B.C. Canada
    0
    Many times the manifold mounting flange will warp. The very best way is to have it put on a emery bench and flattened. I have taken a disc grinder and using a flat file as a guage grind it flat.
    Just a thought!
     
    JohnP3, Dec 17, 2013
    JohnP3, Dec 17, 2013
    #6
  9. Dec 17, 2013 #7
    D389

    D389 Light Load Member

    99
    56
    Mar 24, 2013
    Texas Panhandle
    0
    I will definitely do that next time I change out a gasket or turbo. I never thought about it warping for some reason. Thanks for the input guys!
     
    D389, Dec 17, 2013
    D389, Dec 17, 2013
    #7
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