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Subject: HOT = boiling over

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49er swGA    Posted 07-28-2017 at 08:17:29 [URL] [DELETE]        [Reply] [Email]  
  • HOT = boiling over
  • As per instructions, I`ve Filled to about an inch from the radiators top with water,
    No thermostat in either...
    Both my 49 & 50 get HOT to the point of steaming, boiling over and allowing water to pass by the new radiator cap...
    This definitely a problem on the 49er since it drenches the front mount distributor, and you know what happens then ;)
    I`m thinking water pump impellers MAY be shot?
    Although, I see water circulating/moving inside the radiator at idle though...
    New radiator on the 49er, "Pearl", origYnal on th "Shifty" the Fifty...
    Picking the brains of our Gurus, Thanks, Dennis Crenshaw
    Yeah it has been quite a while :)

    49er swGA    Posted 07-28-2017 at 21:56:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Well SHOOT!
    I see that our CHAT section has beena discontinued...
    No more Friday night chat after the meeting...

    I really enjoyed those, but such is life,

    Farmer Dan    Posted 07-28-2017 at 16:58:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • I could never remember if it was an inch from the neck or an inch over the core. I just fill it and run it until it stops boiling over and call it good LOL.

    49er swGA    Posted 07-28-2017 at 18:24:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Yes Farmer Dan, When I left the cap off today whilst mowing, the water came out to that level...
    I double checked "Shifty th` Fifty" for a thermostat in the upper hose today...
    Nope, ain`t one in there...
    I`ll drain & flush it tomorrow...
    I just recently put an ORC on her soas to mow with it, this year also...

    The lift on "Pearl" the 49er ain`t good enough to mow...
    It had wheels attached on the frontb of the bush hog to keep the deck outta the dirt...

    Thanks again Guys,

    Bruce (VA)    Posted 07-28-2017 at 18:53:49 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • When you're done flushing it, do put a t-stat in it. (tip # 25)

    49er swGA    Posted 07-29-2017 at 09:48:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Yes, I need to buy two...
    I got both flushed good today...
    Radiator & Block were nasty rusted water...

    Thanks again for your guidance,

    Bruce (VA)    Posted 07-30-2017 at 07:42:31 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • If you want to use a 180* t-stat (which I use on all 4 of my 8N's) try A&I part # A-11C15, Gates 33108, Beck/Arnley part # 143-0024, Auto Zone part #3518 or NAPA part number THM 184 for 180* in hose t-stats.

    The car parts store folks are helpless w/o vehicle make/model/year info. Some can/will actually search on the number & cross reference, but more often than not, you will just get a dumb look. HINT: find a clerk near the age of your tractor..... ;) Try telling them that the t-stat is for your 1977 Renault R12 1.6L L4.

    All of my 180* t-stats are A&I A-11C15's or AZ-3518's. They are a very tight fit in an N hose, but they will fit. I've never used the Gates, Beck/Arnley or NAPA t-stats so I can't help you w/ anything there but the part numbers.

    All that being said.....if you do not consistently run the tractor to operating temp, you will get condensation & sludge as a result.



    Bruce (VA)    Posted 07-28-2017 at 12:33:49 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • The most common reason for an N to ďover heatĒ is over filling the radiator. Only add enough fluid to cover the core. (check out tip # 24, below as well as tips 25 & 35) It is not actually over heating; it is just spewing out the excess water.

    If the radiator is not overfilled, check for low coolant, a loose fan belt, debris in the radiator fins or a stuck thermostat. A bad water pump will usually squeak or leak. (If you ever have a water pump start leaking or making noise, replace it immediately. A N water pump will come apart & launch the fan into the radiator.) And, unless you have a new/rebuilt water pump from a reputable source, it could have impeller erosion. The pump will turn, it wonít leak, but it isnít circulating water.

    In order to have a stuck thermostat, you need to have one installed. Squeeze the top hose; if it has a t-stat, you can feel it. Sometimes (rarely) the t-stat can migrate in the hose & get stuck closed. Or, in an attempt to keep that from happening, some owners will put a third clamp on the hose & tighten it too much resulting in a stuck t-stat. The OEM top hose came w/ a non-adjustable ban to keep the t-stat in place.

    The fan belt should have 1/2" of flex at the mid-point; no more, no less.

    Unless you have a pusher fan, blowing out the radiator from the engine side is always a good idea.

    If none of that works, you may need to flush the radiator & block.

    Get a can/bottle of cleaner from the parts store.

    Remove the t-stat from the top hose. Reconnect the hose.

    Pour the cleaner in the radiator & run the tractor to operating temp.

    Then, remove the bottom hose from the radiator, stuff a rag in the bottom radiator hose connection, & stick your garden hose in the top of the radiator. Turn the water on (reverse flush) & the water will flow into the radiator, then the block & out of the disconnected lower hose. Let it run until the water is clear. Then, check the radiator flow. Stick the hose in the top of the radiator; the water should flow out of the bottom w/o backing up in the filler neck. It should flow at 19.5 gallons a minute. Donít forget to put the t-stat back in correctly!

    Use 50/50 anti-freeze & distilled water as your coolant. The anti-freeze contains rust inhibitors, pump lubricant & raises the boiling point of the coolant.

    If you do need to get the radiator re-cored, make sure you get the flat fin industrial core. Automotive style cores will clog up w/ debris very quickly.

    49er swGA    Posted 07-28-2017 at 13:34:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • I remembered wrongly! I have overfilled them both...
    Hopefully after I flush everything and add the CORRECT amount of water & Coolant all will be well...
    Thank You very much for these suggestions and recommendations,

    I can ALWAYS count a helpful crew here...

    JMOR    Posted 07-28-2017 at 11:15:04 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Here is one that has about the right 1/3 of tubes clogged & doing no cooling. See the hot alternator peaking around the dog-leg on left of IR photo. Replacement radiator fixed it, after multiple vinegar soaks and flushings would not.

    49er swGA    Posted 07-28-2017 at 11:47:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • I gotta get me one of them thermal detection guns!!!

    Rustyal    Posted 07-28-2017 at 10:07:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Too full. It will boil out every time. You need 3 or 4 inches of space. Maybe more.

    49er swGA    Posted 07-28-2017 at 10:45:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Being as BOTH Ns are doing it, I`ll try less water...
    I`ve even tried to use coolant to help out...
    I`ll also utilize these other suggestions, belt tension, clean radiator fins of debris...
    I bought NEW caps for both in hopes of keeping the coolant inside :)

    Thanks again guys,

    Keep the suggestions coming...

    Jack - Iowa    Posted 07-28-2017 at 09:08:37 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • 2nd thought!

    Had a loose fan belt one time.

    49er swGA    Posted 07-28-2017 at 09:24:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • AND I`ll check tension here too :)
    Thanks You Jack - Iowa,

    Gotta good start on things to check = Our Gurus are GOOD!

    Jack - Iowa    Posted 07-28-2017 at 09:06:53 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • Harold is correct on the water level.

    When mine start getting hot, so far blowing the radiator fins out has always taken care of the problem. Have you had that new radiator in some tall grass loaded with seed?

    49er swGA    Posted 07-28-2017 at 09:17:21 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Thank you for the reminder to keep the radiator clear of debris...
    But yes I regularly clean with a blower on the air hose after cutting or running through tall stuff...
    I did look at the front of the these radiators to be sure it wasn`t covered, BUT I will Blow air through them again, JUST to be sure they`re clear of debris...

    I`ma catching up on things here this morning...
    It has Been a LONG Time since I`ve clicked NTC :)

    Thanks Again,

    HCooke    Posted 07-28-2017 at 08:46:53 [URL] [DELETE]        [Reply] [Email]  
  • Re: HOT = boiling over
  • "As per instructions, I`ve Filled to about an inch from the radiators top with water,"

    I don't know where you got those instructions. The common advise on this forum and on YT is just to cover the cooling fins.

    Larry (TX)    Posted 07-28-2017 at 10:00:23 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • Same is true for old jeep and many old truck radiators Harold!

    49er swGA    Posted 07-28-2017 at 08:53:28 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HOT = boiling over
  • I`ll go back and re-read FO4 manual for refreshing my memory...
    BUT even then, at just covering the flues, it still boils over...
    I thought I read 1"below the filler pipe which is about 2: above the "cooling fins"
    Thank You for the quick reply, . HCooke,

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