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6.0 L truck motor into 1999 ws6

This is a discussion on 6.0 L truck motor into 1999 ws6 within the Internal Engine forums, part of the LSx Technical Help Section category; My brother burned out 2 pistons in the ls1 in his 1999 Firebird ws6. We have a 6 L truck ...

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    6.0 L truck motor into 1999 ws6

    My brother burned out 2 pistons in the ls1 in his 1999 Firebird ws6. We have a 6 L truck motor that we were thinking of swapping. Will this motor accept all of the alt, power steering, and air conditioning brackets? Also are there any other things that may pose a problem?

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    You're good to go, everything swaps over fine. Long block? Just swap right over. Short block, make sure you have the right head gaskets/etc.

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    Intake wouldn't fit.

    But, I have the LQ9 block in my 1999. Direct replacement. One hole needs drilled and tapped for the alternator.

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    did the intake ports not match up? also would the heads from the ls1 bolt onto the 6 L to fix the intake problem?
    Last edited by superstingray_1975; 08-07-2008 at 03:15 PM.

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    Quote Originally Posted by superstingray_1975 View Post
    did the intake ports not match up?
    Ports are fine.
    The truck intake doesn't fit into the car's cowl.

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    we were just going to use the intake off of the ls1 on the 6L

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    Then it will be fine.


    What heads are on the 6L motor? LQ9 heads or L92?

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    the number we found on the corner of the heads say 317

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    That is the LQ9 head. Your car intake should fit on them.

    Probably wouldn't hurt to put the LS1 heads on it though. I would do some research on it. Compression, flow, etc...

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    Nothing like a Trans Am revving his engine up and it sounding like a truck. I'm not down with it. There's a kid with a swap here in town and it sounds terrible coming from behind such a beautiful midnight blue metallic car.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by SS/CETA View Post
    Nothing like a Trans Am revving his engine up and it sounding like a truck. I'm not down with it. There's a kid with a swap here in town and it sounds terrible coming from behind such a beautiful midnight blue metallic car.
    It is basicly an iron LS2. It wouldn't sound like a truck...

    My car has an LQ9 block in it, but with forged internals. They are all LSx's. The sound depends on the exhaust.

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    Larry Dingleberry Racing
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    Quote Originally Posted by SS/CETA View Post
    Nothing like a Trans Am revving his engine up and it sounding like a truck. I'm not down with it. There's a kid with a swap here in town and it sounds terrible coming from behind such a beautiful midnight blue metallic car.
    agreed its only a change of the block it will sound different but not like a truck it may be the exhaust he has on it or something my stock ls1 had some flow masters on it when i bought it and it made it sound like a truck

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    Quote Originally Posted by Mr. Luos View Post
    It is basicly an iron LS2. It wouldn't sound like a truck...

    My car has an LQ9 block in it, but with forged internals. They are all LSx's. The sound depends on the exhaust.
    Same setup here

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    Senior Member Bottesini's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    It is basicly an iron LS2. It wouldn't sound like a truck...

    My car has an LQ9 block in it, but with forged internals. They are all LSx's. The sound depends on the exhaust.

    Sorry to be a bit off topic, but what gaskets and seals do you use ? I was not sure if the LQ9 and LS1 gaskets were all interchangable (except head of course).

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    Quote Originally Posted by Bottesini View Post
    Sorry to be a bit off topic, but what gaskets and seals do you use ? I was not sure if the LQ9 and LS1 gaskets were all interchangable (except head of course).
    Thinking about it really quickly, I think they all (including the head gaskets) are the same.

    I used Cometic head gaskets for my bore and the thickness I wanted.
    Mostly GM seals and gaskets.

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    Quote Originally Posted by Mr. Luos View Post
    Thinking about it really quickly, I think they all (including the head gaskets) are the same.

    I used Cometic head gaskets for my bore and the thickness I wanted.
    Mostly GM seals and gaskets.
    I think the LQ9 has slightly larger bores on the gaskets. I used the MLS

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    Senior Member Bottesini's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Thinking about it really quickly, I think they all (including the head gaskets) are the same.

    I used Cometic head gaskets for my bore and the thickness I wanted.
    Mostly GM seals and gaskets.
    Quote Originally Posted by That Guy 2-1 View Post
    I think the LQ9 has slightly larger bores on the gaskets. I used the MLS
    Yeah I was not so worried about the head gasket since I planned on Cometics (they should be different for the LS1 and LQ9 because of the bore size). Just trying to plan how much I will need to spend on the little things so I can budget it into my build. Been kind of a pain finding gaskets (other then the head gaskets) for an LQ9, but the LS1 they are easy to quickly look up.

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    The outside of the block is no different than the LS1. I used LS1 seals/gaskets/covers on mine.

    Of course the bore on the head gaskets will be different.....
    You want just a hair over your bore. Then pick thickness.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Thinking about it really quickly, I think they all (including the head gaskets) are the same.

    I used Cometic head gaskets for my bore and the thickness I wanted.
    Mostly GM seals and gaskets.
    heads gaskets are not the same from a LS1 to the LQ9. the bore on the 6.0L is 4.000 the LS1 is 3.898. overall the head gasket is designed the same with the exception of the bore diameter.

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    One hole needs drilled and tapped for the alternator.

    pics of how to do that is on the bottom of my webpage here

    http://www.stealthram.com/408.htm

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