Thread: LIM Gasket's

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  1. #1 LIM Gasket's 
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    So I have neglected my bad LIM for about a year or so now. My 2005 N/A has about 140000miles on it and I have some symptoms of a bad LIM.

    -little bit white smoke out tail pipe.
    -coolant very slowing going away (avg 1 quart over 6mths)
    -engine temp fluctuating 180-210

    1) Now its time to replace them and I need some help with gasket brands. I plan to get the aluminum LIM gaskets from GM. What brand should I do for the others?

    2) What brand / type Gasket sealer for the four corners of the LIM?

    Thanks in advanced.........
    Last edited by TDgrand; 02-12-2012 at 06:28 PM.
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  2. #2 Re: LIM Gasket's 
    GTP Level Member chevyy1212's Avatar
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    Felpro Felpro AND...... Felpro. Order from Rockauto Im not sure but I know there was a discount for people on the forum. I saved about $50 if not more ordering it all from Rockauto
    1998 GS with Open cone, PLOG, ZZP Catless DP, tune & Intense MPS 3.6. Pulls good enough to make the woman smack me and call me a D!*k.
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  3. #3 Re: LIM Gasket's 
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    Thanks for the info.

    Does anyone know what the sealant is called / type that you use when replacing the LIM gasket? You are suppose to put it in the four corners before and after placement.
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  4. #4 Re: LIM Gasket's 
    GTP Level Member chevyy1212's Avatar
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    It comes with the felpro kit i know
    1998 GS with Open cone, PLOG, ZZP Catless DP, tune & Intense MPS 3.6. Pulls good enough to make the woman smack me and call me a D!*k.
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  5. #5 Re: LIM Gasket's 
    GXP Level Member txslow6's Avatar
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    Quote Originally Posted by TDgrand View Post
    Thanks for the info.

    Does anyone know what the sealant is called / type that you use when replacing the LIM gasket? You are suppose to put it in the four corners before and after placement.
    Black RTV IIRC.
    85 Corvette
    01 TA
    03 Z06
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  6. #6 Re: LIM Gasket's 
    Turbo is the way to go. BillBoost37's Avatar
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    FelPro is a good gasket, the GM gasket IMO is a lot sturdier and better. Take your choice they are both metal framed and should work equally.

    On your "symptoms", please understand that the temp fluctuation is normal as your low speed fans come on at ~216F and high speed at ~228F. Orange crud, if coolant was in your oil it would appear that the oil was milky. Gasket Sealer - Permatex Ultra Copper. There is no replacement. It is the best.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  7. #7 Re: LIM Gasket's 
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    I just changed the oil and did not notice any milky type consistency. Only small tiny bubbles which I am unsure if it is normal.

    Since I loose a little coolant over time and with 140000 miles on my GP, what is the proper way of testing to see if i have an internal coolant leak.

    pressure test the radiator?

    Thanks.
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  8. #8 Re: LIM Gasket's 
    Turbo is the way to go. BillBoost37's Avatar
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    To check if coolant is getting into the oil. Check for the oil to be milky.
    To check if coolant is getting into the cylinders (LIM leak), look for white smoke out the tail pipe.

    At 140 you may as well do the LIM gaskets, but it's doubtful you'll notice much of a difference in how the engine runs.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  9. #9 Re: LIM Gasket's 
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    I have paid attention to exhaust, there is a little white smoke and has a moist feeling when you place you hand behind it.

    How does this effect the engine since it has been neglected? The engine runs quite well with 140000.
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  10. #10 Re: LIM Gasket's 
    I live here. SlowNA06's Avatar
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    Coolant in the oil will cause all moving parts to slowly degrade.

    Coolant in cylinders isn't terrible. Until the leak gets big enough to cause hydrolock.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  11. #11 Re: LIM Gasket's 
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    You will also need the plastic coolant elbows, Black Rtv, GM Lower intake (Its better), Valve cover gaskets, (Option), Injector O rings (Option), New thermostat (option) Check your spark plugs and wires this would be a great time to do a tune up. If you want you can also switch over to green coolant, make sure u flush radiator, heater core, the engine block and resivor.
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  12. #12 Re: LIM Gasket's 
    GTP Level Member chevyy1212's Avatar
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    I think I got a extra set of those coolant elbows didnt know they cam in sets of 2 from Rock... It will probably cost more to ship that buy but free if ya want em
    1998 GS with Open cone, PLOG, ZZP Catless DP, tune & Intense MPS 3.6. Pulls good enough to make the woman smack me and call me a D!*k.
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  13. #13 Re: LIM Gasket's 
    Turbo is the way to go. BillBoost37's Avatar
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    That moisture you feel in your exhaust is the water from condensation that's sitting in your mufflers.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  14. #14 Re: LIM Gasket's 
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    chevyy1212 thanks for the offer on the elbows, I replaced them about 5months ago.

    Is this correct plenum gasket set from rock auto, FEL-PRO Part # MS96691

    My GP is a 2005 3800 N/A

    It looks like it includes the throttle body gasket.

    2005 Pontiac Grand Prix, Base, 3800, N/A
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  15. #15 Re: LIM Gasket's 
    Turbo is the way to go. BillBoost37's Avatar
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    Sure looks it. Does that fit your year?
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  16. #16 Re: LIM Gasket's 
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    It this the updated aluminum gasket design from GM?



    ACDELCO Part # 89017816

    Just want to make sure.
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  17. #17 Re: LIM Gasket's 
    Turbo is the way to go. BillBoost37's Avatar
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    Yup, that's what the gm's look like.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  18. #18 Re: LIM Gasket's 
    GTX Level Member Jakegday's Avatar
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    that first pic is incorrect, that is just the upper intake gasket set. the 2nd pic is the lower set, which is what you're looking for. you can get the upper intake set but your current one is completely reusable.
    2001 GT: cat/ubend/resonator delete, zzp PLOG, custom intake, DHP pcm
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  19. #19 Re: LIM Gasket's 
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    When do you recommend draining the oil and coolant.

    First?
    2005 Pontiac Grand Prix, Base, 3800, N/A
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  20. #20 Re: LIM Gasket's 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Quote Originally Posted by TDgrand View Post
    When do you recommend draining the oil and coolant.

    First?
    right after you put it back together, then fill with oil, run it for 10-20 miles, then change it again, along with a filter.

    SMGPFC Member #1
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