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Thread: Got a 3/4 ton radiator + 172* thermo!

  1. #1
    Join Date
    Apr 2003
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    Mansfield, Texas, USA
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    Well that 3/4 ton rad is HUGE! It is still a single core but it has a 34" core. I stole this thing pricewise...they are about $250 new I lauged my ass off at that price.

    Also I picked up a LS1 172* thermostat, that should be perfect with this monster rad.

    I now gotta find that ATF heat exchanger "quick disconnect" tool and will install this thing.

    Should be able to get my temps down to the low 180's.
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  2. #2
    Join Date
    Aug 2003
    Location
    Spring, TX
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    281
    So a LS1 172* t-stat will fit a 5.3L?
    -leo-
    2009 Silverado CC - 6.0L L76|6l80e|3.42s|4/7 drop w/ helper bags

    01 silverado ecsb - (RIP 04/2009)

  3. #3
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    Mar 2003
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    San Antonio, TX
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    another score , hahaha

    ya, it doesn't matter how many cores anymore these days, that one big ass core should be plenty,
    i know with my Howe radiator, alumrad.com, it only has two cores, but they are 1" a piece, it's very nice, my 160 stat makes my truck run about 176 all the time and it never gets above 180, that's cause the fans come on,

    hey, before you swap, get some numbers on the temps your run, like in traffic with ac on, with ac off, highway temp, stuff like that, we can use it later for mods that really work page, hehe, maybe your tranny temp will go down too, did it come with a trans cooler built in?

    post those numbers, thanks,

    allen

  4. #4
    Join Date
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    Mansfield, Texas, USA
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    Originally posted by farmtruc@Aug 28 2003, 02:17 PM
    another score , hahaha

    ya, it doesn't matter how many cores anymore these days, that one big ass core should be plenty,
    i know with my Howe radiator, alumrad.com, it only has two cores, but they are 1" a piece, it's very nice, my 160 stat makes my truck run about 176 all the time and it never gets above 180, that's cause the fans come on,

    hey, before you swap, get some numbers on the temps your run, like in traffic with ac on, with ac off, highway temp, stuff like that, we can use it later for mods that really work page, hehe, maybe your tranny temp will go down too, did it come with a trans cooler built in?

    post those numbers, thanks,

    allen
    I have the stock 26-28" core with a modified stock thermo (BB drop in), well my temps still go back to hot as hell after a while. I dunno if it is because I have an air pocket or what. Like they will go to the middle of the stock gauge for a while then creep back up. I tried burping that bastard maybe 20 times so I just think this super hot Texas heat has killed the radiator.

    Hopefully this will get me down. Oh yeah it does have and ATF heat exchanger in it too.

    I took some numbers and stuff over on the LS1tech truck pages: http://www.ls1tech.com/threads/showflat.ph...art=&PHPSESSID=
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  5. #5
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Mine never runs over 185 with the AC on in traffic and the stock 305 radiator I had before the swap.
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  6. #6
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    Mar 2003
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    [quote]
    another score , hahaha

    ya, it doesn't matter how many cores anymore these days, ...

    I took some numbers and stuff over on the LS1tech truck pages: http://www.ls1tech.com/threads/showflat.ph...art=&PHPSESSID=
    what's that link, nobody ever goes over there anymore, hahaha, jk, good info to have,

    good luck on getting the temps down, it's a pita to have high temps, i also think the truck gauges are a tad inaccurrate, looks like you were using atap, a lot better.

    later,

    allen

  7. #7
    Join Date
    Apr 2003
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    Mansfield, Texas, USA
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    [quote]
    another score , hahaha

    ya, it doesn't matter how many cores anymore these days, ...

    I took some numbers and stuff over on the LS1tech truck pages: http://www.ls1tech.com/threads/showflat.ph...art=&PHPSESSID=
    what's that link, nobody ever goes over there anymore, hahaha, jk, good info to have,

    good luck on getting the temps down, it's a pita to have high temps, i also think the truck gauges are a tad inaccurrate, looks like you were using atap, a lot better.

    later,

    allen
    Hahaha, at least the people there know what they are talking about and are smart...ha take that FSC!

    Stock gauges suck. Take my F-150...I have a 4 core, 180* thermo, and a high flow (30% more) water pump and the stock gauge still reads in the same place! Hahaha.

    Would I be okay to use like 1 gal of dex cool and the rest water?
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  8. #8
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    I don't think more dexcool is going to help, i've tried that and tested water vs mix vs both mixed and i didn't have any good results, i just run a little bit of dexcool to keep the corrosion and freezing down,
    i did get my truck to run about 135degs during cool months, here's how, i simply removed the stat completely , and with my badass radiator and going down the highway on cool, early spring days, i was at 135degs, not exactly ideal, lol, but it was cool, it stayed real cool to in traffic , with the fans running of course, but 135deg, just isn't enuff to activate a couple of things the pcm controls,

    later,

    allen

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