Turbo to manifold gasket?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Izlomik Supatrucka, Sep 28, 2010.

  1. Izlomik Supatrucka

    Izlomik Supatrucka Light Load Member

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    Oct 24, 2009
    Texas
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    Does anyone have this problem or know why im having this problem?

    Bought the truck in january of this year and about month and a half into the deal had to replace the
    gasket thats between the turbo and the manifold but new cat bolts in and the next week turbo went so
    in that mix they put another gasket and 4 new bolts in and about 2 months later im running in south
    louisianna and the dang turbo literally almost fell off had the 2 loose bottom bolts holding it the top 2
    are gone so i put another gasket and bolts in and this time we broke out the torque wrench and torqued to spec
    and this time it lasted about 3 months and noticed last weekend 1 of the top bolts gone and today noticed part of the gasket is
    gone ive been hearing the ticking of the leak but it wasnt very loud so assumed it was a band clamp im suspicious of.......

    Its an 03' KW with the bridge cat if that makes any diffrence......

    Im about ready to take this turbo and manifold off and order a borg warner turbo and new manifold and
    use this junk for a boat anchor.....Its not that it costs and arm and a leg to replace the gasket and bolts
    only $50-60 bucks but im getting tired of jacking with it every 2 or 3 months surely this isnt common?:biggrin_2556:
     
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  3. Mr. Haney

    Mr. Haney Road Train Member

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    Dec 17, 2008
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    I've seen this happen when the wrong bolts are used or when drive pressure is up so high it's trying to force the gasket out. Since you have a bridge with a stock ECM and turbo this shouldn't be the problem. Does the truck still have the stock mufflers on it? If so the catylic converters maybe stopped up causing the high back pressure in the exhaust.

    You will need to flash the ECM to a 6NZ or 7CZ file if you want to install a BW turbo. I would also remove the mufflers and use Donaldson M100463 in there place to lower exhaust back pressure. The only other thing that maybe creating your problem is the manifold or turbo flange has warped and you're not getting an even crush on the gasket. Go with a PDI manifold instead of a CAT
     
  4. Izlomik Supatrucka

    Izlomik Supatrucka Light Load Member

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    Oct 24, 2009
    Texas
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    yes the PDI fold is what im planning on going with intime.....the 1st 2 times i repeced gasket the truck still had
    the mufflers and my egt ran up to 1200 with ease on hills but took mufflers off and went with straight pipes
    about 2 weeks ago and it dropped my egt's a good 200 degrees but it possibly could've been blown before i straight
    piped it i cant really say yes or no on that.....guna replace this sucker 1 mo time and see what it does if she goes again
    its comeing off......and the new is going on i should go ahead and do it anyway and stop wasteing time and money and
    get the goods......

    PS ive used the cat bolts everytime i replaced gasket i was told they were special heat treated or something
     
  5. Mr. Haney

    Mr. Haney Road Train Member

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    You're getting there.

    Yes the CAT bolts are a special heat treated alloy designed for this application. Always use CAT bolts to install a turbo. Once you get the PDI manifold it will come with special studs and nuts to install the turbo.
     
  6. AUSSIE DAVE

    AUSSIE DAVE Road Train Member

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    Feb 21, 2010
    OZ - Brisbane
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    an old boss of mine used non cat bolts years ago and guess what they broke. I would by cat bolts use anti sieze on the threads and install new gasket as stated above, good luck, oh yes check the faces for warp's
     
  7. sandman1976

    sandman1976 Medium Load Member

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    burgaw,nc
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    how does the pdi manifold stand up to the rest? full tilt,pitt power,bully dog,etc....
     
  8. DL550CAT

    DL550CAT Road Train Member

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    I have a 06 ACERT I've had both the plain and ported/coated PDI manifolds on it. Both are worth the money IMO the plain nonported is the better buy. They are made very well alot better than the oe.
     
  9. chalupa

    chalupa Road Train Member

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    If your letting a shop do the refit, be sure to tell them all this too. And a Q: Is 1200 EGT an everyday thing for you or just a rare bird on a hard pull?
     
  10. Mr. Haney

    Mr. Haney Road Train Member

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    1200 EGT is hot, but if you're dealing with a stock MBN CAT this is considered normal. In the MBN this heat creates issues with the manifold and turbo after awhile, usually the center sections of both crack and start eroding away
     
  11. Mr. Haney

    Mr. Haney Road Train Member

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    Full Tilt, Bully Dog and Pitt Power are selling the same exact manifold with different labeling on it. PDI manufactures their own manifold, I feel the PDI manifold after it's been extrude honed and coated is a better product compared to the BD, FT, and PP ported and coated manifold. The reason I feel this way is the flow is very close in the plenum area between the manifolds, but the turbulence is lower with extrude honing over porting. Lower turbulence in the plenum causes the turbo to respond quicker.
     
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