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Radiator surge tank Included?

Discussion in 'Questions From New Drivers' started by New97pete, Dec 6, 2019.

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  1. Dec 6, 2019 #1
    New97pete

    New97pete Bobtail Member

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    Dec 6, 2019
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    I got a 97 peterbilt 379 a month ago. Replaced oil cooler couple weeks ago. Looking to see if anyone knows if there should be a surge tank next to the radiator cap. Right now there is coolant spitting out of the nipple next to the cap spraying it under my hood. It's not overheating or nothing. It's running around 150-185° It had a 10lb. cap before but just replaced it with a 7lb. Any Advice helps. Thanks brothers
     
    New97pete, Dec 6, 2019
    New97pete, Dec 6, 2019
    #1
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  3. Dec 6, 2019 #2
    Deere hunter

    Deere hunter Road Train Member

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    Sounds like you got a head gasket gone and it’s building pressure in your radiator!
    The only surge tank on the 379 is what the cap Is sitting on!
     
    Deere hunter, Dec 6, 2019
    Deere hunter, Dec 6, 2019
    #2
  4. Dec 6, 2019 #3
    AModelCat

    AModelCat Road Train Member

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    How full did you fill the rad? If you filled it right to the brim, its got no room to expand.
     
    AModelCat, Dec 6, 2019
    AModelCat, Dec 6, 2019
    #3
  5. Dec 6, 2019 #4
    New97pete

    New97pete Bobtail Member

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    I topped it off like in a car. Thought that's how its suppose to go. Theres no overflow either. Does that matter?
     
    New97pete, Dec 6, 2019
    New97pete, Dec 6, 2019
    #4
  7. Dec 6, 2019 #5
    New97pete

    New97pete Bobtail Member

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    It had a inframe done. It could be a head gasket but I'm not overheating. Heck the temp is always around 150 unless I'm hauling a load climbing a hill when it will raise the temp to 180 or so
     
    New97pete, Dec 6, 2019
    New97pete, Dec 6, 2019
    #5
  8. Dec 6, 2019 #6
    Ridlingdj

    Ridlingdj Medium Load Member

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    I thought that even those had a black overflow tank right by the window
     
    Ridlingdj, Dec 6, 2019
    Ridlingdj, Dec 6, 2019
    #6
  9. Dec 7, 2019 #7
    Chubby Fly

    Chubby Fly Medium Load Member

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    No, I have a 379 and surge tank is the top part of the radiator. It has an overflow tube that goes out the nipple down the side of radiator. Sounds like you way overflowed it. I fill it to the middle seem of tank or slightly above. It will still push out the tube if overflowed and I’ll just let it do it’s thing till it gets to right level. If you topped it off, it will push out a ton of coolant.
    This is what the top surge tank looks like
    Peterbilt 379 Radiator Top Tank Surge Tank 357 377 378 OE#'s 0706602 0706657A031 | eBay
     
    Chubby Fly, Dec 7, 2019
    Chubby Fly, Dec 7, 2019
    #7
    New97pete Thanks this.
  10. Dec 7, 2019 #8
    Ridgeline

    Ridgeline Road Train Member

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    Replace the cap with a 15 psi cap.
     
    Ridgeline, Dec 7, 2019
    Ridgeline, Dec 7, 2019
    #8
    spindrift and Roberts450 Thank this.
  11. Dec 8, 2019 #9
    New97pete

    New97pete Bobtail Member

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    Ok that's exactly what I got. I just done have a hose running down the side of the nipple so it did surge out and made a mess under my hood but I'll be sure not to fill it to the brim anymore. Thanks for the help and advice. Take care!
     
    New97pete, Dec 8, 2019
    New97pete, Dec 8, 2019
    #9
    Chubby Fly Thanks this.
  12. Dec 8, 2019 #10
    New97pete

    New97pete Bobtail Member

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    Dec 6, 2019
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    I dont think they do, I've researched it a little and doesnt seem to give me a part for this type of pete. Maybe I'm wrong though
     
    New97pete, Dec 8, 2019
    New97pete, Dec 8, 2019
    #10
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