392 Runs HOT! Boils Over :(

Discussion in 'General IH Tech' started by J.J., Sep 17, 2020.


  1. mallen

    mallen Y-Block King

    Joined:
    Sep 26, 2012
    Messages:
    3,658
    Likes Received:
    921
    Trophy Points:
    113
    Location:
    Sacramento,California
    We call that a nice day. When it drops into the 90 we go outside and talk about how nice it is out and it's cooled down. It hit 115 here recently. But I understand how you have a lot of humidity that makes it feel a lot hotter.
     
    Last edited: Sep 20, 2020
    J.J. likes this.
  2. TravelerMan79

    TravelerMan79 Farmall Cub

    Joined:
    Apr 15, 2020
    Messages:
    395
    Likes Received:
    113
    Trophy Points:
    43
    Location:
    Ottawa, ON
    Yes, there are many opinions as there are people. Even after my machinist “cleaned” my block, I still found stuff inside after it was assembled. Without a complete teardown, and baking and then cleaning professionally, flatheads will always have stuff in then. Unfortunately, my machinist didn’t have the fancy bake and clean machine, and just poked around as best he could flushing out what he got loose. I’ve seen a few vids with folks fixing up their home brew electrolysis using a battery charger with the block submerged in a barrel. Seems to work but also seems like a huge hassel.
     
    J.J. likes this.
  3. 1975IH200

    1975IH200 Y-Block King

    Joined:
    May 7, 2007
    Messages:
    3,333
    Likes Received:
    591
    Trophy Points:
    113
    Location:
    Western North Carolina
    Knock out some freeze plugs on each side.
    Use a pressure washer to clean out the coolant gallery.
    Not very easy on an installed engine.
     
    J.J. and jeff campbell like this.
  4. RBS

    RBS Farmall Cub

    Joined:
    Jul 31, 2008
    Messages:
    246
    Likes Received:
    127
    Trophy Points:
    43
    Location:
    Normal, IL
    With all that is going on in this engine, I would plan on pulling the heads on both sides and replacing the head gaskets. Hopefully it isn't a cracked head but at this point I would want the heads off to take a good look at both heads and the block deck, clean things up, and replace the gaskets.

    It is easy for me to make suggestions while you are the one doing the work but ultimately you want a rig you can trust and given the neglected cooling system, overheat symptoms, and the "gunk" coming out of there I would expect that the head gaskets on both sides are compromised. Good luck getting her running like new again.

    Rodger
     
    J.J. likes this.
  5. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
    I am picking up a set of head gaskets today, I ordered them yesterday. I filled the radiator with water last night and could see a steady stream of bubbles flowing thru. I also ran a compression check and came up with these:

    8-120 7-120
    6-125 5-120
    4-125 3-125
    2-125 1-115

    No real signs of a "washed" spark plug but perhaps it didn't run long enough. I have another block out here minus the heads so Ill do a dry run with the power washer.

    Thanks everyone for your help and thoughts.

    JJ in TN
     
    RBS and jeff campbell like this.
  6. Chris Cooper

    Chris Cooper Binder Driver

    Joined:
    Mar 11, 2018
    Messages:
    879
    Likes Received:
    354
    Trophy Points:
    63
    Location:
    Longmont, CO
    As a recovering vintage Fiat owner, I would recommend checking those heads with a straight edge, JJ.
     
    J.J. likes this.
  7. mallen

    mallen Y-Block King

    Joined:
    Sep 26, 2012
    Messages:
    3,658
    Likes Received:
    921
    Trophy Points:
    113
    Location:
    Sacramento,California
    Are they nos gaskets or the modern thick ones. The modern ones significantly decrease your compression unless steps are taken to compensate.
     
  8. kdsmit

    kdsmit Binder Driver

    Joined:
    Apr 7, 2015
    Messages:
    598
    Likes Received:
    309
    Trophy Points:
    63
    Location:
    Delton,MI
    I had a 392 with a similar problem. This is what I found. I hope that you have a better outcome. WIN_20150905_192049.JPG WIN_20150905_192049.JPG WIN_20150905_192049.JPG
     
  9. jeff campbell

    jeff campbell Lives in an IH Dealership

    Joined:
    Jan 8, 2003
    Messages:
    15,713
    Likes Received:
    1,660
    Trophy Points:
    113
    Location:
    lima,ohio
    Seen many like that
     
  10. mallen

    mallen Y-Block King

    Joined:
    Sep 26, 2012
    Messages:
    3,658
    Likes Received:
    921
    Trophy Points:
    113
    Location:
    Sacramento,California
    When you end up with a massive coolant leak inside the engine like that, you have to clean the coolant out of the engine. It causes the addatives to precipitate from the engine oil as a microscopic grit. If you try multiple oil changes, every new oil change creates even MORE grit as the remaining coolant reacts with the fresh oil. That's why coolant destroys your bearings. It's not corrosive, but instead when combined with motor oil addatives, it's abrasive. To get it out mix 50% butyl-cellosolve (find a chemical supplier locally) with non-detergent oil. In the SV engine, I'd probably use my old favorite, ford tractor transmission fluid. Drain the old oil. ( and vacuum out those cylinders if need be) Then fill with the 50-50 mix and idle the engine for 20-30 minutes. Then drain it. The butyl cello solve allows the water to disperse into the oil. (it's used to disperse oil slicks) The procedure came from an old tractor manual, although I've seen it elsewhere using other dispersants.
     
    Last edited: Sep 20, 2020
    RBS likes this.
  11. 2dafloor

    2dafloor Farmall Cub

    Joined:
    Dec 9, 2012
    Messages:
    166
    Likes Received:
    13
    Trophy Points:
    18
    Location:
    knoxville
    I think he means that crack in the block?
     
  12. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
    C2, yes, going to take them to a machine shop. A Fiat? You are a man of eclectic automotive! A 1310, Kaiser and now a Fiat, thats cool!

    JJ in TN
     
    Chris Cooper likes this.
  13. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
    Felpros. Composite. I will be taking the heads to a machine shop, I know some needs to be milled off?

    [​IMG]

    JJ in TN
     
  14. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
  15. Chris Cooper

    Chris Cooper Binder Driver

    Joined:
    Mar 11, 2018
    Messages:
    879
    Likes Received:
    354
    Trophy Points:
    63
    Location:
    Longmont, CO
    Thanks, man. Soft spot in my head: Fiat Abarth Zagato, '59 500 Nuova. This was decades ago.
     
  16. mporter52

    mporter52 Binder Driver

    Joined:
    May 17, 2005
    Messages:
    666
    Likes Received:
    64
    Trophy Points:
    28
    Location:
    San Antonio, TX
    How do you use the panty hose? I know I read something about it in one of your builds? I'm will be restarting my 304 in a little while and would like to catch any scale before it goes into the new radiator. I already popped all the freeze plug and shot water through it with a pressure washer.
     
  17. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
    Like this:

    [​IMG]

    JJ in TN


    Sent from my iPhone using Tapatalk
     
  18. mporter52

    mporter52 Binder Driver

    Joined:
    May 17, 2005
    Messages:
    666
    Likes Received:
    64
    Trophy Points:
    28
    Location:
    San Antonio, TX
    Yeah, I saw that. Is the "foot" part of the hose stuck in the radiator?
     
  19. J.J.

    J.J. Lives in an IH Dealership

    Joined:
    Dec 14, 2003
    Messages:
    5,742
    Likes Received:
    3,002
    Trophy Points:
    113
    Location:
    Castalian Springs, TN
    A little bit of it, enough to make a pocket. Not all of it because I didn't want to risk it coming apart in there and having a bigger mess. Seems to work pretty good.

    JJ in TN
     
    jeff campbell likes this.
  20. mallen

    mallen Y-Block King

    Joined:
    Sep 26, 2012
    Messages:
    3,658
    Likes Received:
    921
    Trophy Points:
    113
    Location:
    Sacramento,California
    :cornfused:That's a relief. I was thinking you wore them while working on the truck or something.
     
    dwengi, RinTX and jeff campbell like this.

Share This Page