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    Results 1 to 16 of 16
    1. #1
      Join Date
      Mar 2022
      Posts
      141

      Car puking coolant

      Hey guys,

      Ran the car 1000 miles this past weekend. Car ran well but is puking coolant everywhere out of the overflow tank. When I'm on the highway, the temp starts at about 175, then slowly climbs to 190 or so as the coolant is emptying out of the rad. When I get off the highway and slow down (reducing cooling over the rad), the temp quickly starts to rise. I then stop, put more water in the rad and the whole process starts over again.



      I changed the cap last week thinking that was the problem but it didn't fix it. I am afraid the system is getting pressurized by a bad head gasket. The engine runs great and I don't see any white smole out of the exhaust, but something is pressuring the system and I am not sure what.

      Would getting the system pressure tested help?

      Any ideas?


    2. #2
      Join Date
      Mar 2022
      Posts
      141
      OK, so I called a local rad company and they gave me an idea i thought i would share. He said to fill the rad up with water completely. Then roll the motor over, if it bubbles or pushes water out of the top then its a blown head gasket. Here's to hoping it's not. I will check it when I get home.

    3. #3
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,528
      Country Flag: United States
      I think you are most likely overfilling your radiator. Only fill it to when the tubes are covered. Don't fill it right to the top….
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    4. #4
      Join Date
      Apr 2018
      Location
      Oakland
      Posts
      70
      Did you check to see where your dad coolant level is at after it puked put coolant? Like somebody mentioned, could be over filled.

      Did you fill radiator and coolant overflow at the same time when you topped off?

    5. #5
      Join Date
      Mar 2022
      Posts
      141
      No, I'm not overfilling it. Because when I get off the highway the temp goes straight up to 215, it didn't used to do that. When I stop, I am putting in 2 large bottles of drinking water and it still doesn't go to the top. It's puking 1/2 the radiator out.

    6. #6
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,528
      Country Flag: United States
      Did you burp it when you initially filled it? If not, burp it.
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    7. #7
      Join Date
      Mar 2022
      Posts
      141
      I didn't do the initial fill but thats a good idea, I'll burp it tonight.

    8. #8
      Join Date
      Nov 2018
      Posts
      680
      Country Flag: United States
      If the problem persists after you've done the easy stuff, do a cylinder leakdown test. It'll let you know if there is a head gasket problem and what cylinder it's on.
      2021 Durango R/T
      2005 Dakota beater
      2003 Dakota project-o-mobile

    9. #9
      Join Date
      Mar 2022
      Posts
      141
      Yeah, I thought about doing a quick compression test. Figured if it's a leak, it will show up on one cylinder. There is also a gasket tester that you can put on the raidiator and pull air through it, it will change color and show whether it has combustion gasses in the coolant. It's called "block tester". I'm going to see if the local auto parts store has one for rent.

    10. #10
      Join Date
      Jul 2008
      Posts
      462
      Country Flag: United States
      what type of fan are you running? Mechanical, electrical? Are they working? Have you done anything to the way air is flowing into/through the rad? Done anything in the engine bay that would change air flow characteristics or block air from exiting?
      *Jeff*
      Project Salty - 1964 4 door Malibu, beaten, neglected, red headed foster child
      Cammed LQ4 / T56 Swap Project Thread <-click to read! 😁

    11. #11
      Join Date
      Mar 2022
      Posts
      141
      After spending some time with the car this weekend I found two small holes in the rad. That was the culprit. Now I just have to find someone that can drain and pressure test to see if it's fixable or if I have to order a new one. At least I found the leak.

    12. #12
      Join Date
      Nov 2018
      Posts
      680
      Country Flag: United States
      Glad you found the problem. However, it's rare these days that fixing a radiator is cost effective. If it was caused by corrosion, the entire inside of the radiator will have similar corrosion and will just develop new leaks in a short amount of time. If getting the core replaced, unless you have metal endcaps you now have old plastic on new metal, and the repair will likely cost as much as a new one so it's best to just replace it. Not to mention, you'll spend the next year worrying about it if you try a repair.
      2021 Durango R/T
      2005 Dakota beater
      2003 Dakota project-o-mobile

    13. #13
      Join Date
      Mar 2022
      Posts
      141
      Your probably right. This is a high end "be cool" rad that is all aluminum. I don't know if that makes a difference. I am hoping to avoid having to spend $500 on a new rad but it depends on where this one is leaking. It may not even be fixable. I am going to pull it this weekend, get it to a shop and see if it's fixable. If it is, I'll go that route. But if I do end up fixing it and it springs another leak I will just junk it at that point.

    14. #14
      Join Date
      Dec 2011
      Location
      Oregon coast
      Posts
      188
      Country Flag: United States
      If you end up needing a new rad check out Champion radiators, I've been very pleased with mine and they are significantly cheaper than some of premium aluminum ones. They also have scratch/dent ones for super cheap if you not super concerned about cosmetics.

    15. #15
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,528
      Country Flag: United States
      I am not sure that swapping out a two row radiator for a three or four row Champion is a sound choice. Two rows with one inch or larger tubes will outperform a three or four row radiator with a large margin.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    16. #16
      Join Date
      Dec 2010
      Location
      Fredericksburg, VA.
      Posts
      3,161
      Country Flag: United States
      Turns out leaking head gaskets are a common failure point in the diesel pickup world especially on the Ford power stroke diesels. Leaking head gasket symptoms include high pressure in the cooling system, remaining pressurized even when cold, puking coolant out he overflow while driving and constantly having to add coolant. Sadly, I'm having this same issue with my Duramax. I have been quoted between $7,000 to $12,000 to have a shop replace head gaskets and install head studs. You can go to any auto parts store and buy a kit for testing for the presence of exhaust gas components in the coolant. That test kit will tell you pretty quickly if you have a leaking head gasket or not.
      Steve Hayes
      "Dust Off"
      68 Camaro

      Support the RPM Act
      https://www.sema.org/rpm-faq.





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