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Need help with stock manifolds

This is a discussion on Need help with stock manifolds within the External Engine forums, part of the LSx Technical Help Section category; So my car has a crap ton of miles on it and I will be replacing the ORY(manifolds to y-pipe) ...

  1. #1
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Need help with stock manifolds

    So my car has a crap ton of miles on it and I will be replacing the ORY(manifolds to y-pipe) this weekend. I think im going to buy both new 02 sensors and new gaskets . I hope I wont break any bolts of studs off in the manifold .. and what do you guys recommend to use to get the bolts loose?(and reused them) I was going to let them soak over night in PB blaster. and does anybody know if I will need any special tools?

    What size bolt plugs the o2 bungs btw?

    Ill post some pics when Im done. My DAPO cut out one cat and butchered where it mounts to the car.. Ill also be painting the rest of the exhaust while she is out

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    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
    2001 Trans-Am 13 F-XT

    What about headers?

  3. #3
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Cant afford them at the moment. Already bought the y pipe for 189. Ill probably keep this setup till I throw a built ls6 in her. Cant have much downtime till I get another DD. which will be when it starts getting below 32 degrees..( im not driving her in snow.. never again!)

    I looked at the bolts and they look rusted to shit.

  4. #4
    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
    2001 Trans-Am 13 F-XT

    You could have gotten the ebay headers for that price and some flex pipe to make a Y.







  5. #5
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    I wont ever buy ebay headers

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    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
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    I may try them. I want to do a turbo setup down the road, but until that time comes I want a bit more power and sound cheap.

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    Member TRANS-DAD's Avatar
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    BLACK
    2001 T/A VERT.

    I know you bought a y-pipe and can't wait to put it on , but just wait for headders!!
    That's alot of work to do twice! And not realy any gains

  8. #8
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    79 T/A -91 Firebird
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    Im not going to be be getting headers until the engine...

    I cant stress this enough.Headers doesnt need to be mentioned in this post.. lol

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    Member TRANS-DAD's Avatar
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    BLACK
    2001 T/A VERT.

    ok then maybe you could just run four pipes frome the motor on each side into a collector then to your fucking y-pipe!!

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    79 T/A -91 Firebird
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    Quote Originally Posted by TRANS-DAD View Post
    ok then maybe you could just run four pipes frome the motor on each side into a collector then to your fucking y-pipe!!
    uhh.. ok...


    what are you talking about. I need some tips on a y-pipe removal...

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    515 HP TrickFlow Package BADASS2000SS's Avatar
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    440 RWHP / 410 TQ
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    Hahaha..he was making a header joke! That shit was funny.

  12. #12
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    79 T/A -91 Firebird
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    yeah.. not feeling it..

    seriously needs some tips from someone who has done it.

    Dont want to break off my manifold bolts and HAVE to buy headers...

  13. #13
    Jesus died to save you! Killer_bluebird's Avatar
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    Soak them in PB and don't us an impact gun. Go slowly Do a few turns in one bolt then another while the first cools down and so forth. Go to the dealer and get a couple replacement bolts just in case as you do break (that way you are not waiting and you can get on with the job) if you end up not using the bolts you can always return them.

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    Member fast enough Z28's Avatar
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    silver
    98 camaro z28 m6

    Make sure the car is nice and warmed up or you will break them. Other than that think the socket was a 10mm.

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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Hah. I think ill buy all new bolts and gaskets.

    Worst case senario.. I break a bolt off and have to take off the manifolds..

  16. #16
    Jesus died to save you! Killer_bluebird's Avatar
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    Navy Blue Metallic
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    I don't think you do they are double sided bolts if you can call them that, but if you can get the rest of the rest of the bolt of the manifold you will have to drill it out.
    2000 NBM Camaro Z28
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  17. #17
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Are the stock flange gaskets metal?

  18. #18
    Jesus died to save you! Killer_bluebird's Avatar
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    I do not think so.

  19. #19
    suckme sideways andrew69_04's Avatar
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    black w/ ghost stripes
    02 ws6

    Take your time. as many factory Y's as i have taken off (40+) i would say i have broken manifold studs off reguardless of how gentle I was with them. It all depends on the car. some cars come out like cake, others are a PITA. Sometimes the whole stud will come out but thats ok. If you can, spray them from both the bottom side, and also the top side where the actual stud exits the back side of the manifold flange. good luck.

    Y-pipes are pretty easy. this should only be like a 1.5hr job on jackstands. The o2's will need a 7/8" wrench to take them out.

    if your new o2's dont already have some one it, a little antiseize on the threads is a great idea......hope this helps you out

  20. #20
    Senior Member INMY01TA's Avatar
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    Good luck. I broke one of mine when the car was pretty new.

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