Thread: Change LIM gasket what else should I replace at the same time?

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  1. #1 Change LIM gasket what else should I replace at the same time? 
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    Guys

    My 1999 GT just turned 97,000 without any problems to date. I am the original owner and nothing has been done with the expection of maintenance. My manintenance included engine oil/filters, trans oil/filter, belt, plugs/wires, air filter, and antifreeze. Since I am changing the LIM gasket what other items should I replace at the same time.

    George
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  2. #2 Re: Change LIM gasket what else should I replace at the same time? 
    I live here. 02NavyBlue's Avatar
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    Well the kit you buy should come with the new injector o-rings, and everything you need to replace it. Other than that maybe replace the upper intake manifold with a dorman one since it's not prone to failure like the oem. You said you did coolant, the thermostat could be replaced if needed.
    Last edited by 02NavyBlue; 01-17-2014 at 07:24 PM.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
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  3. #3 Re: Change LIM gasket what else should I replace at the same time? 
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    Quote Originally Posted by 02NavyBlue View Post
    Well the kit you buy should come with the new injector o-rings, and everything you need to replace it. Other than that maybe replace the upper intake manifold with a dorman one since it's not prone to failure like the oem. You said you did coolant, the thermostat could be replaced if needed.
    one of the big w-body parts suppliers, should sell you a big ass kit, that sells you everything you need to do a Lim job the right way. Including all the gaskets, coolent elbows, t-stat, silicone, VC gaskets etc.

    Would be handy. Instead of trying to piece together all the gasket's and such you'll need to get the job done and forgetting something.
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  4. #4 Re: Change LIM gasket what else should I replace at the same time? 
    Killa Bee Scottydoggs's Avatar
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    its way cheaper to piece it together, trust me. i did all that shopping.

    lim gaskets were 42 bucks. upper plenum gasket aint all that much. O rings for the injectors cost like 8 bucks. if you even need them.


    dont forget a set of coolant elbows, they sell the metal ones now. the top one has to be changed so change em both.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: Change LIM gasket what else should I replace at the same time? 
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    Quote Originally Posted by Scottydoggs View Post
    its way cheaper to piece it together, trust me. i did all that shopping.
    I get ya, i need to do the same thing, but it would be stupid handy to have the full kit, just done, order it, and you have everything you need.
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  6. #6 Re: Change LIM gasket what else should I replace at the same time? 
    Killa Bee Scottydoggs's Avatar
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    not for 30 bucks more, you cant click a mouse?

    i did my lim job for just under a 100 bucks. soup to nuts. coolant, O rings, elbows, T's and new vac lines too. no oil change, that would have been $20 more.

    not sure what a n/a upper plenum goes for but it cant be that much.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #7 Re: Change LIM gasket what else should I replace at the same time? 
    GTP Level Member indygrandprix's Avatar
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    You can re-use the upper plenum gasket in most cases and instead of replacing the upper plenum it's easier and cheaper to plug the TB coolant ports off with quick steel and is the only sure way to totally eliminate the egr tube/plenum melting problem

    And get aluminum coolant elbows like scotty said
    Quote Originally Posted by BillBoost37 View Post
    I went NA when a whore left -$300 in my bank account.
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  8. #8 Re: Change LIM gasket what else should I replace at the same time? 
    I live here. Slick2500's Avatar
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    Quote Originally Posted by 71gs3504sp View Post
    Guys
    Quote Originally Posted by 71gs3504sp View Post

    My 1999 GT just turned 97,000 without any problems to date. I am the original owner and nothing has been done with the expection of maintenance. My manintenance included engine oil/filters, trans oil/filter, belt, plugs/wires, air filter, and antifreeze. Since I am changing the LIM gasket what other items should I replace at the same time.

    George
    Quote Originally Posted by indygrandprix View Post
    You can re-use the upper plenum gasket in most cases and instead of replacing the upper plenum it's easier and cheaper to plug the TB coolant ports off with quick steel and is the only sure way to totally eliminate the egr tube/plenum melting problem

    And get aluminum coolant elbows like scotty said
    L26 upper intake.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  9. #9 Re: Change LIM gasket what else should I replace at the same time? 
    GTX Level Member nos4blood70's Avatar
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    +2 on the metal coolant elbows.

    L26 intake solves UIM issues but at the cost of the intake/TB adapter. Easier to plug the ports with some loose pocket change.
    -Carl
    "Penelope" - 145k Miles 2003 Bonneville SLE


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  10. #10 Re: Change LIM gasket what else should I replace at the same time? 
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    Unless you already have a l26 intake, plus aluminum > plastic anyway.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
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    Superchargers take away horsepower
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  11. #11 Re: Change LIM gasket what else should I replace at the same time? 
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    Guys

    I am just trying to get as much done as possible since I have the top of the motor apart. I am looking for input to parts that needs replacing or not.
    This is the list of parts I believe I need to get:
    - LIM gasket
    - Aluminum Elbows
    - Throttle Body Gasket (since I am cleaning it out)
    - UIM gasket (I am blocking the water passages)
    - Serpentine belt
    - Radiator Hoses
    - Heater Hoses
    - Thermostate (Stock 195) and Gasket
    - Coolant bypass gasket
    - Water Pump
    - Valve Cover and grommet gaskets
    - Vaccum hoses

    I keep reading that there are a couple of vaccum hose T's that needs replacing. Can someone give me a information or part numbers for the T's.

    George
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  12. #12 Re: Change LIM gasket what else should I replace at the same time? 
    Killa Bee Scottydoggs's Avatar
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    advance auto has the best T's i could find local. a 2 pack for 2 bucks. small white t's.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #13 Re: Change LIM gasket what else should I replace at the same time? 
    I live here. 02NavyBlue's Avatar
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    He's N/A remember.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
    Sold.
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  14. #14 Re: Change LIM gasket what else should I replace at the same time? 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by 02NavyBlue View Post
    He's N/A remember.
    he be in Narcotics anonymous? lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #15 Re: Change LIM gasket what else should I replace at the same time? 
    I live here. 02NavyBlue's Avatar
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    You know Naturally aspirated lol. (So no vacuum T's as far as I'm aware) But who knows, he may be into that stuff as well.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
    Sold.
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  16. #16 Re: Change LIM gasket what else should I replace at the same time? 
    Killa Bee Scottydoggs's Avatar
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    yeah, i hate it when a n/a job sneaks in on me.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #17 Re: Change LIM gasket what else should I replace at the same time? 
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    Don't hate on us naturally aspirated guys, we're fast in our own way
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
    2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits.
    Sold.
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  18. #18 Re: Change LIM gasket what else should I replace at the same time? 
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    Don't mess with the coolant bypass gasket unless it's leaking. It can be a pain to get to seal again.

    Sent from A Galaxy Far Far Away........
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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