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Farmall & IHC Tractors Discussion Forum
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Draining early M coolent for winter

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Paul G. in Mn

10-13-2005 13:46:04




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Ive got a 1939 M and have some water leaks and dont have the time to fix them before winter. Is there a way to drain all the coolent before it freazes on one like this?




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riverbend

10-13-2005 19:34:56




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 Re: Draining early M coolent for winter in reply to Paul G. in Mn, 10-13-2005 13:46:04  
It my IT manual serves me correctly, the cooling system on your M hold 6 gallons of coolant. Antifreeze is under $6 a gallon on sale (Fleet Farm). For $20 you can be sure that the block won't crack. Why not run 50% antifreeze and a bottle of stop leak ? Fix it when you get time. If half of it leaks out, $10 is nothing compared to the cost of the repair.

Greg



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El Toro

10-14-2005 04:11:38




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 Re: Draining early M coolent for winter in reply to riverbend, 10-13-2005 19:34:56  
That's good advice and I would run the engine to make sure the mix is circulated through the block.
Hal



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El Toro

10-13-2005 13:52:10




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 Re: Draining early M coolent for winter in reply to Paul G. in Mn, 10-13-2005 13:46:04  
I would pull the bottom radiator hose and let her
drain. Loose the radiator cap once you have the
hose off to vent the radiator. This should the block too. Hal



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RustyFarmall

10-13-2005 17:20:51




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 Re: Draining early M coolent for winter in reply to El Toro, 10-13-2005 13:52:10  
No, draining the radiator will not drain the block also. The only way to drain the block is to remove the drain plug on the side of the block, in behind the carb. If this plug hasn't been out for about 60 years, you could be in for a real fun time.



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El Toro

10-13-2005 18:47:48




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 Re: Draining early M coolent for winter in reply to RustyFarmall, 10-13-2005 17:20:51  
That sure is weird, What size is that plug? If that plug can't be removed, is it big enough to drill a 1/4" hole through the plug to allow the block to drain. Then drill the plug with a "R" drill and then use a 1/8 pipe tap to cut threads
into the drilled hole so it can be plugged or install a drain cock. If this isn't possible
he may be better off to drain the radiator and antifreeze the tractor to keep it from freezing over the winter. Hal

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randy hall

10-13-2005 20:07:44




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 Re: Draining early M coolent for winter in reply to El Toro, 10-13-2005 18:47:48  
3/8" npt



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El Toro

10-14-2005 04:00:32




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 Re: Draining early M coolent for winter in reply to randy hall, 10-13-2005 20:07:44  
That's not quite big enough to drill and tap. An R
drill is about 3/8". Hal



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