Thread: Radiator upgrade for 97-03 GP's

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  1. #21  
    GrandPrix Junkie CrazyGuy03's Avatar
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    Just so no one else runs into this ,
    The NAPA stock radiator has 1" cores now anyways.
    So you order a stock 2003 regal or grand prix supercharged. It comes 1" core. No silly bottom hoses no silly fan clips not lining up. AND it comes with a set of fittings for your cooler lines.
    Last edited by CrazyGuy03; 01-17-2013 at 10:29 PM.
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  2. #22 Re: Radiator upgrade for 97-03 GP's 
    GrandPrix Junkie PurpleGuy's Avatar
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    Sooo..anyone used that 1 3/8's core with headers? I'm in need of a radiator and would like to upgrade to this but i'm not sure if it will clear with headers.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  3. #23 Re: Radiator upgrade for 97-03 GP's 
    GrandPrix Junkie PurpleGuy's Avatar
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    I believe the 1 3/8's core will fit. It's 1/2" difference.

    However I have another question. Why can't we use the regular Monte lower hose? Everything looks to be in the same spot.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  4. #24 Re: Radiator upgrade for 97-03 GP's 
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    4THGEN- I don't know for sure if the Monte lower hose will clear or not. Never tried it. I was going off a recoomendation from another person that had done it and was told to use that particular lower hose so it would clear the belt and pulleys. If the Monte hose routes away from the belt as well then good to know.

    As far as headers and this rad. I don't see why not. It may be close but not interfering. If I can ever save up some extra $$ I'd like to get a set of headers on my GT, even though it's not S/C'd I don't see why it wouldn't hurt to help the flow.
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  5. #25 Re: Radiator upgrade for 97-03 GP's 
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    for the record all lq1 cars had the big radiator
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  6. #26 Re: Radiator upgrade for 97-03 GP's 
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    On the clearance thing a bunch of 95-9 montes run an lq1 radiator with 3.8s and headers. And 95-99 montes have a LOT tighter engine bay. Just my $0.02
    Quote Originally Posted by FordMan77 View Post
    4THGEN- I don't know for sure if the Monte lower hose will clear or not. Never tried it. I was going off a recoomendation from another person that had done it and was told to use that particular lower hose so it would clear the belt and pulleys. If the Monte hose routes away from the belt as well then good to know.

    As far as headers and this rad. I don't see why not. It may be close but not interfering. If I can ever save up some extra $$ I'd like to get a set of headers on my GT, even though it's not S/C'd I don't see why it wouldn't hurt to help the flow.
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  7. #27 Re: Radiator upgrade for 97-03 GP's 
    I live here. Slick2500's Avatar
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    That radiator is only $77.79 on Rockauto now.
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  8. #28 Re: Radiator upgrade for 97-03 GP's 
    GrandPrix Junkie Booba5185's Avatar
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    Sorry to bump an old thread, but I have a buddy with an 04 looking to do this. He already has slim fans, so I only need to worry about adapting the cooler lines, right?
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  9. #29 Re: Radiator upgrade for 97-03 GP's 
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    Should be it. Not sure how the trans. lines connect to the rad. on the 04+ cars.
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  10. #30 Re: Radiator upgrade for 97-03 GP's 
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    Hello all. Does anyone know if this will work on a GP with a 3100, or what differences there will be? I already blew the head gasket once because of the weak cooling system on this car and I don't want it to happen again.
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  11. #31 Re: Radiator upgrade for 97-03 GP's 
    I Write E85 Stickies Frosty's Avatar
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    The stock cooling system is more then sufficient for a stock 3100. If you did blow a head-gasket from overheating and not from it being a typical 3100 failure then it is because something is wrong with your cooling system. To answer your question yes it will most likely work. Like others have said though your much better off just getting a 1" stock replacement radiator. No trans cooler issues or fitment issues.
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  12. #32 Re: Radiator upgrade for 97-03 GP's 
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    ^ That is what I was leaning towards since the 1 inch is a direct fit. Everything is working fine now I just want some extra security in case it ever runs a little low before I catch it.

    Thanks for the reply.
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  13. #33 Re: Radiator upgrade for 97-03 GP's 
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    I have this on my 00 gt and just bought 2 trans fittings from the store and it all fits up really nice
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  14. #34 Re: Radiator upgrade for 97-03 GP's 
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    Did the 1 3/8" swap on my monte...few washers and fans were fine. Recently did the swap on a 98gtp.....took about an inch off lower hose...fit fine. Mebbe if trimming a hose or using washers is too hard you shouldnt b messing with ur car in the first place.....
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