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5.7l vortec exhaust manifold

This is a discussion on 5.7l vortec exhaust manifold within the Technical / Maintenance forums, part of the General Discussion category; my exhaust leak around the manifold is gettin bad so its due up for replacement...any forseen problems remving bolts?...are they ...

  1. #1
    Registered User blown up bowtie's Avatar
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    5.7l vortec exhaust manifold


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    my exhaust leak around the manifold is gettin bad so its due up for replacement...any forseen problems remving bolts?...are they known to snap like in the 5.3s ive heard about...anyone know the torque specs to put them back on?and what brand of manifold do you guys sugest?

    1997 GMC Sierra, Hp dana 44, Corp 14 bolt, 5.13s, 19 inches, 44tsl's

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    Registered User gmsuv's Avatar
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    Re: 5.7l vortec exhaust manifold

    Tighten the exhaust manifold bolts on the first pass to 15 Nm (11 lb ft).
    Tighten the exhaust manifold bolts on the final pass to 30 Nm (22 lb ft).

  3. #3
    rollin the nasty D's!!! Double Dueces's Avatar
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    Re: 5.7l vortec exhaust manifold

    make sure them bolts are hot, then they will come out much better for ya!

    '01 XCSB a few mods done to it.
    truck parts http://www.supermotors.net/vehicles/...ry/10422/66312

  4. #4
    Registered User blown up bowtie's Avatar
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    Re: 5.7l vortec exhaust manifold

    thanks guys...you think the best way to pinpoint the leak is to put a rag in the pipe so the leak w/ amplify...im pretty sure its in the manifold but i may be the collecter

    1997 GMC Sierra, Hp dana 44, Corp 14 bolt, 5.13s, 19 inches, 44tsl's

  5. #5
    Big Daddy 1-8-4-3-6-5-7-2's Avatar
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    Re: 5.7l vortec exhaust manifold

    Is this a passenger side manifold?

    The point where the manifold meets the exhaust pipe is a common place for a leak. The pipe will also go bad there.

    On my Burb, the pipe that bolts to the manifold was bad and the previous owner patched in a repair piece. The repair pipe went bad, so my exhaust guy cut it of and installed another repair pipe. Now the pipe is cracker further down. I'm just going to have a new pipe made from the manifold to the cat.
    :-)

    '96 Suburban, 17x9 Helo's, 37" Toyo MT's, 14 bolt sf, 5.13 Yukon by Custom Differentials, Black Bear tune!



 

 

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