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Thread: Radiator Questions

  1. #1
    Thinks you're strange spectac's Avatar
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    Default Radiator Questions

    I am in need of a replacement radiator and was wondering why there are so many variations for different vehicles/engines. Is there a difference in performance or is it just a fit thing? The one I need is $600 and I'm hoping I can use a cheaper one if I fab a mount for it. anybody an expert on these things?
    Any insurgents near the blast “would be real gooey inside.” -Lt. Col. Kirk Cordova USMC

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    Still Growing Too! Big Green's Avatar
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    Larger engines produce more heat thus a larger radiator with more cooling surfaces to cool the coolant to keep your engine from overheating. Look around online, you may be able to find a radiator from another application that will work either used or for less money. Might have to fab up some mounts though.

    Lots of interent searches may yield you good deal also.

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    9mm is faster than 911 Shortcut's Avatar
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    What year Jeep, model and engine application do you need a radiator for? Manual or Auto Trans?

    A 600 buck radiator is around the price of a custom item designed to cool a V-8 conversion.

    Bob
    To become an AMSOIL Preferred Customer and save 20 - 25% off of the retail prices click on the following link

    http://www.amsoil.com/catalog.aspx?subcategory=50&zo=506808

    www.jpvehicle.com
    800-750-0000

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    Thinks you're strange spectac's Avatar
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    Quote Originally Posted by Shortcut View Post
    What year Jeep, model and engine application do you need a radiator for? Manual or Auto Trans?
    '48 CJ2a with original motor. manual
    Any insurgents near the blast “would be real gooey inside.” -Lt. Col. Kirk Cordova USMC

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    Senior Member HillBillE's Avatar
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    Quote Originally Posted by spectac View Post
    '48 CJ2a with original motor. manual
    Have you checked the CJ2A forum? $6 bills seems pretty steep, unless you are going for 'exact original'

    Try here, bunch of great folks: http://www.thecj2apage.com/forums/


    I do have some stuff for 2A's, but not a spare rad. Let me know if your looking for anything else.


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


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    Junior Member 913's Avatar
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    Yeah, the repop ones are pricey, I was just checking Omix and they are the same. It appears this guy has used ones starting at $90 based on this forum post on G503.com.

    Good luck in your search! Got any pics of the CJ2A?

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    Senior Member HillBillE's Avatar
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    Also try radiator barn. They don't list one, but have a contct page (and probably a number)

    Contact page:https://www.radiatorbarn.com/help.php


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


  8. #8
    Thinks you're strange spectac's Avatar
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    I will have to call some of those places tomorrow.
    Quote Originally Posted by 913 View Post
    Got any pics of the CJ2A?

    Got it from Sarge_CJ2A
    Any insurgents near the blast “would be real gooey inside.” -Lt. Col. Kirk Cordova USMC

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    Junior Member 913's Avatar
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    Look nice! I've been poking around for a project/shop flat fender.

    Keep us posted on the radiator situation!
    Dirty Dog Offroad
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    Junior Member noelcavazos's Avatar
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    while this might not apply to you savagesun4x4 gave me so good insight to what really happens under the hood.kinda long but here you go ver-ba-tum
    Go OEM!!!!! Rest is a waste of time, money.

    http://www.savagesun4x4.com/enter/te...ussion_ii.html

    How 'bout all those 23 row rigs etc:


    The entire system is codependent on each and every other component, alter one too much and the result is a failure to perform properly due to it being out of balance with itself. *Especially the fan and its linkages. Go to a multi-row radiator and expect for the fan to generally work harder in order to pull the air thru. More rows, greater resistance to air movement. Move too much air thru the radiator and there will not be enough heat transfer to effectively cool. *The air must have the proper amount of latency across the fins/rows. Move too slowly and the air heats too much and cannot accept any more heat transfer from the remaining rows it has to travel over.

    1 row Vs 2 row Vs 3 row etc:

    Simple question, complex answer.

    Multiple rows bring with them their own bag of worms. The more rows the more turbulence in the air flow across them. This turbulence reduces the ability of the air to flow and:

    1) extract heat from the rows

    2) flow across the rows at a predetermined rate that makes calculating heat transfer and the resulting cooling predictable

    3) it takes more fan "pull" [aka CFM]to drag the air across multiple rows

    Cooling systems are very codependent on each individual component.

    It is my suggestion that you examine your current system design and base your purchase upon that. That said your Jeep currently uses a single row rad design. And, you have modded it by adding the 7-blade fan/clutch setup.

    What the 7-blade fan does is increase the CFM of air the fan will pull thus improving its cooling ability. [NOTE: This is NOT always the case. All too often more CFM leads to less cooling rather than more/better cooling. Why? In order for cooling to take place the air must have a degree of "latency" as it travels across the row(s). This latency is when the heat transfer takes place. Move the air too fast and it does not cool. Same as removing a thermostat. Take it out and most likely you will overheat, due to the fluid moving too quick thru the system.]

    Like air slowing down as it passes thru the multiple rows, so does the coolant. *As it slows down or increases it latency then the air needs to speed up in order to extract the additional heat that this latency generates. *More rows, slower coolant flow, more air CFM required to cool.

    In all likelihood you could go multiple rows if you have a fan that will pull more CFMs and probably overcome the turbulence factor.

    On the other hand I see no reason to do so. The OEM rad works fine and with the addition of the fan/clutch upgrade will cool your rig with AC on rock crawling up a wash.

    Point:*

    The cooling system is codependent and must ALWAYS remain in balance with itself or it fails to work. *Understanding this is why I chose to stay with a OEM cooling system.

    When it comes down to it, it is just a question of cooling system balance.

    Don

    '11 Jeep Grand Cherokee Overland, HEMI
    factory 4.5" lift, AIR CONDITIONED Seats
    and heated STEERING WHEEL

    Owner: SavageSun Engineering LLC

    www.savagesun4x4.com

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