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Subject: Sporadic Rad coolant leak

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Kevin Fisher    Posted 08-20-2019 at 14:15:04 [URL] [DELETE]        [Reply] [Email]  
  • Sporadic Rad coolant leak
  • Hi folks...been quite a while since I posted last. My '47 2N has been running great until recently. Well, she still runs fine but I've been finding rad coolant underneath the radiator.

    It's very strange as when running, there is no leak. No pinholes, nothing. Even after I turn her off nothing happens..I've got a tray underneath and there isn't a drip.

    However...if I leave her idle long enough...say, five days...I'll find some coolant on the floor under the rad. Just a small amount. Leave her idle another day and there will be more...a puddle. But if I start her up and let her run for a bit...not only is there no leak during the run, but the leak won't happen for several days after if the tractor is left idle.

    For the life of me I can't figure out what would cause a sporadic leak like that, so I thought I'd ask here. Any thoughts? I did end up having to top up the coolant and even did the black pepper trick to no avail.

    Tim Daley(MI)    Posted 08-21-2019 at 01:49:08 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Sporadic Rad coolant leak
  • There is a petcock drain plug on the bottom of the radiator and often that will leak when idle. Put a container under it next time you park it and see if that is root cause. If so, then you can evaluate how much is leaking and if not an excessive amount, don't worry about it. Just run thru the standard check list of all fluids before you fire up the engine to verify all oils and water are good. If water is low, top it off like you would with your oil.

    Tim Daley(MI)

    Farmer Dan    Posted 08-20-2019 at 14:33:29 [URL] [DELETE]        [Reply] [Email]  
  • Re: Sporadic Rad coolant leak
  • you will need to crawl under it and look for where its coming from. Could be the water pump or a bad hose.

    Beth and Allen    Posted 08-20-2019 at 19:30:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Sporadic Rad coolant leak
  • A couple of things I,ve run into is if the antifreeze to water ratio is too high it will find even the smallest of holes to leak from. Another thing is maybe a clamp isn't quite tight enough, it holds good while warm but when every thing cools down and things shrink it leaks.How old are your hoses,sometimes they get old and brittle and start getting small cracks that leak when cold. Just my 2cents worth. God Bless,Beth and Allen.

    Kevin Fisher    Posted 08-27-2019 at 11:43:33 [URL] [DELETE]        [Reply] [Email]  
  • Re: Sporadic Rad coolant leak
  • Hello folks: Sorry for the late reply.

    It's been over a week and despite my best attempts to locate even so much as a small drip has failed...no leak, and that's with the tractor running and in use, or sitting idle. And I can't see petcock drain plug either, unless I'm really looking in the wrong place.

    I am using a 50/50 ratio for the coolant. As for the hose age...well i wouldn't say they are -new- but they're not showing any obvious signs of cracking. I've checked the clamps as well and they appear to be quite tight. We've gone from warm weather to rather cold weather in a short time so I would have expected to see an expansion/contraction leak.

    Of course everything would be a lot easier if I could see even a drip hanging off the bottom of something underneath the tractor...

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