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Subject: thermostat question

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Curby Perkins    Posted 11-30-2018 at 00:48:28 [URL] [DELETE]        [Reply] [Email]  
  • thermostat question
  • I have owned a 2N since 1987 and have always used it without a thermostat. I have been doing some service on it. Going back on with the radiator I decided I would put a thermostat in it. It seemed that almost all of you recommended it.
    Now with the thermostat installed after running my tractor for a few minutes it overheats. There is steam coming from the top of radiator and I cannot keep my hand on top of it. To hot. I installed it with the point of thermostat towards the radiator.

    Thanks for any ideas

    Curby Perkins    Posted 11-30-2018 at 16:06:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: thermostat question
  • Thanks for the replies.
    I flushed it back in the spring. I will try drilling the hole that Chuck mentioned and see if that takes care of it.
    Thanks

    Tim Daley(MI)    Posted 12-01-2018 at 08:22:28 [URL] [DELETE]        [Reply] [No Email]  
  • Re: thermostat question
  • I really don't think drilling holes is the answer nor trapped air as the root cause problem as Chuck described, but, it is your tractor and you can do anything you want to it. Over a half million N's have survived without mucking with the OEM design so it's your call. Overheating a radiator is usually the result of overfilling, underfilling, or plugged fins. Perhaps you need to take it in to a radiator shop and have it boiled/cleaned properly. One other point is the OEM thermostat originally had a clamp on the hose to keep it situated closer to the engine, in the lower part of he hose. Ford eventually discarded the clamp, but many use a regular hose clamp or the cheaper plastic wire ties to keep it from creeping up towards the radiator top.

    OEM FORD N RADIATOR THERMOSTAT, HOSE, & CLAMP:

    Tim Daley(MI)


    Jock(OR)    Posted 12-02-2018 at 11:26:36 [URL] [DELETE]        [Reply] [No Email]  
  • Re: thermostat question
  • While I agree that an orignal-quality thermostat should not need modification to work properly, in our modern age of imported aftermarket parts it is entirely possible that a thermostat would need a bleed hole drilled in it.

    I installed a "will-fit" thermostat in an 8N with the same results as the OP. It turns out that the original application (foreign car) had a bleed hole elsewhere in the thermostat housing, and to get it to work in the 8N I had to drill one in the body of the thermostat near the opening for the plate. It works great now.

    I would not be too concerned about the size of the hole. If it is a little large, it will slow warm-up ever so slightly. If too small, it might not allow enough flow to break the air-lock, but it would need to be tiny to do that. I think I used about a 3/32" drill bit on mine, but 1/8" would have been fine.

    Curby Perkins    Posted 12-04-2018 at 21:15:21 [URL] [DELETE]        [Reply] [Email]  
  • Re: thermostat question
  • Thanks Jock......Going to take the thermostat out and drill the hole. I'm just not sure just where to drill it. Should it be drilled on the pointed end that goes toward the radiator?

    Thanks

    Jock(OR)    Posted 12-09-2018 at 23:52:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: thermostat question
  • Drill it anywhere that allows coolant to pass from one side to the other, and does not interfere with the operation of the thermostat. Drill from whichever side gives you the best access. Thermostats vary in design, so there is no one way to describe how to do it.

    Curby Perkins    Posted 12-11-2018 at 00:45:42 [URL] [DELETE]        [Reply] [Email]  
  • Re: thermostat question
  • Thanks Jock

    Rustyal    Posted 11-30-2018 at 14:27:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: thermostat question
  • You should not have caused problems by installing a thermostat. You know to only fill the radiator to the top of the fins. Several inches from the top should be air in the radiator. Also the thermostat should be installed closer to the radiator than the engine.

    Bob in KS    Posted 11-30-2018 at 09:44:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: thermostat question
  • I agree with Chuck NH. Thermostat in hose sits up from block output. Drill a small 1/8" hole in top edge of thermostat housing away from working mechanism. This will allow air to purge and allow a small stream of coolant to rise up through the thermostat and enable it to open.

    Chuck NH    Posted 11-30-2018 at 07:29:05 [URL] [DELETE]        [Reply] [Email]  
  • Re: thermostat question
  • Had that happen to me on my TO-20 once with the same type thermostat in the top radiator hose. Problem is the thermostat is trapping air between the thermostat and head and not opening. I ordered another thermostat from another supplier and problem solved. Doing additional research afterward I discovered the thermostat needs to have a small hole drilled in it to allow trapped air to vent to the radiator.

    Tim Daley(MI)    Posted 11-30-2018 at 05:39:01 [URL] [DELETE]        [Reply] [No Email]  
  • Re: thermostat question
  • Are you overfilling the radiator? When was the last time you flushed it?

    Tim Daley(MI)

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