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Diesel Vs. Gas Radiator

Discussion in 'The Garage' started by ARAMP1, Nov 15, 2006.

  1. ARAMP1

    ARAMP1 Aviator Extraordinaire

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    Anyone know off hand what the difference between the radiators of a 454 truck and one with a 6.2? Is it 3 core versus 4?
     
  2. steve_kibbe

    steve_kibbe 1/2 ton status

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    The diesel is alot wider iirc.
     
  3. desertrat67

    desertrat67 Hawk Driver

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    The tranny cooler is on the left side on the diesel(driver's) and the right on the 454. I tried to get one from a CUCV for my crew cab for a spare, but saw the different line routing and said forget it.
     
  4. steve_kibbe

    steve_kibbe 1/2 ton status

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    The oil cooler hookup is on the drivers side too.
     
  5. JpEater

    JpEater 1/2 ton status

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    Same size radiator. 34" core 4 Row. Just the hose necks are different sizes and the coolers are opposite sides.
     
  6. Jimbo*

    Jimbo* 1/2 ton status

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    No, they are not the same size. The 6.2 rad is about 6-7" wider, they are both 4 row, and like has been said, the tranny and oil coolers are reversed.
    The 6.2 is easy to put into a rig with a gas motor, just have to splice the upper rad hose 'cause nobody makes one for that application.
    Jimbo
     
  7. ARAMP1

    ARAMP1 Aviator Extraordinaire

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    Okay, I’ve got no coolers at all in the radiator; just an in and an out and a separate return from the heater core. (Manual trans, separate oil cooler) But, there’s different part numbers for gas and diesel. I want as big of a radiator that will fit in there, but I obviously want it to fit.
     
  8. Jimbo*

    Jimbo* 1/2 ton status

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    I'll get pics of the comparison tomorrow--you want a 6.2 radiator.
    Jimbo
     
  9. ARAMP1

    ARAMP1 Aviator Extraordinaire

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    Jimbo,
    If you could, I'd appriciate it.
     
  10. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

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    What year truck front clip are you putting it in? If it's an 81 or later, it'll fit just fine. The provisions are there for the wider diesel radiator. I still run the diesel radiator with my 350. I can see where bolt holes are that would mount to top bracket in narrower. I want to say it's wider towards the driver's side. I've thought about a dual snorkel air cleaner, but the radiator blocks the cutout on the driver's side. That'll give you an idea how wide it is.

    I would take a diesel 3-core over a gas 4-core.

    As stated the outlet/inlet on the rad is bigger than gas. I was able to get a universal type radiator hose on the bottom and I used 2 different hoses on the top with a huge barbed union. I got the union from a farm irrigation supply place. The top hoses were some type of factory hose, I just looked through the Carquest catalog at various picture to find 2 with the right bends.
     
  11. steve_kibbe

    steve_kibbe 1/2 ton status

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    The diesel radiator I have is 41" tank to tank, and the core is 34" wide.
    It is a 4 core radiator.
     
  12. cegusman

    cegusman 3/4 ton status

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    The diesel radiator is bigger
     
  13. jdemaris

    jdemaris Registered Member

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    Radiator

    6.2D diesel radiator can be two, three, or four rows in the core. Many of the two-row radiator actually have more capacity then the four - because the rows are much wider. Also, the diesel application has the oil-cooler lines, and the low-coolant sensor port. If you need more specs., let me know. I've got over a dozen spare radiators I can measure - of every variety.
     
  14. DesertDueler2

    DesertDueler2 1/2 ton status

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    Also if you have serp. setup, the stock upper hose will not fit with the diesel rad.. It hits the alt. because you have to stretch it over.Dan
     
  15. u2slow

    u2slow 1/2 ton status

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    Big Block radiators vary in size. The one in my Dad's '79 is a 34" 4-row core, but no engine oil cooler. Dunno about the hose fitting sizes. The other rad I've seen with the 454 is a 28x19" core... whereas the smaller engines are most often 28x17" core.

    When I needed a rad for my 6.2L, only 4-rows showed up in parts books.
     
  16. JpEater

    JpEater 1/2 ton status

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    I have a 6.2 radiator in my BB K10 and its a 34" core. I also have a radiator out of an 89' V3500 w/454 and what do you know its also a 34" core. The only difference between the two in front of me is the neck sizes and coolers are opposite. They are also both 4 row.
     
  17. 4xcrazy

    4xcrazy 3/4 ton status

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    i find this interesting, that GM installed a bigger radiator in the Diesels, over the gas engines, being that Diesel engines burn cooler anyways,,,,weird,,but anyways,,,carry on:D
     
  18. twodollars

    twodollars Registered Member

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    The 6.2, and 6.5 are idi engines, and since conbustion starts in a pre chamber in the head, deposit a great deal of heat into the cooling system.
     
  19. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

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    I have my diesel radiator the the serpentine setup on the 350. Just depends on how you run the hose.
     

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