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gene smith 07-31-2012 08:34:57 75.107.0.38 Report to Moderator	We've had radiator checked; it's okay, yet this tractor quickly overheats, with fresh coolant. Belts & fan are okay. It's an old unit: SN 351687-R4; has no thermostat and no water pump, but circulation is good. Any tips out there as to what could be wrong? [Reply]   [No Email]
gene bender 07-31-2012 11:33:44 67.55.226.123 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 08:34:57   The # you posted is part# of the block. Serial# is behind the throttle rod under #1 sront spark plug. The gurgiling sound is what other post says the block is probably plugged somewhat in those hole areas. You can remove the radiator and lower outlet and using compressd air and some stiff wire get most of the gunk out your operatinf temp is in the range so you are in pretty good shape. Removing the hea will not get to that area the sleeve needs to be removed to do a complete cleaning.   [Reply]  [No Email]
Janicholson 07-31-2012 10:39:29 199.17.55.151 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 08:34:57   Use of a gasket dsigned for a water pump eqquipped engine will also make heat, The holes are too small to work with thermosiphon. Jim   [Reply]  [No Email]
gene smith 07-31-2012 10:58:25 75.107.0.38 Report to Moderator	Re: overheating/Farmall A in reply to Janicholson, 07-31-2012 10:39:29   Thanks, Jim. Since posting my question, we checked with a thermometer, and we don"t really have a problem:-). The circulating coolant temp held at about 175-180. Still, we hear the coolant bubbling and "boiling" as it were. It fooled me but not the thermometer.   [Reply]  [No Email]
Janicholson 07-31-2012 12:25:42 199.17.55.151 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 10:58:25   The engine is going to make perking noises when shut down from working. They start doing it after a month. Crud buildup in the water jacket will make it a little worse, but it is just flat normal. Jim   [Reply]  [No Email]
old 07-31-2012 12:24:52 209.86.226.32 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 10:58:25   Common question here is just like yours. You shut the engine down and you hear what you think is boiling coolant and yep they sound odd after they have been working but that is just the way they are. Plus over filling one will also cause people the oh no thing also since if over full they will in fact blow some coolant out   [Reply]  [No Email]
Arnold Layne 07-31-2012 11:10:19 66.146.251.171 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 10:58:25   That sounds more like it!   [Reply]  [No Email]
Dean Olson 07-31-2012 09:28:56 75.53.96.101 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 08:34:57   More info please. What's it doing? Do you have a gauge on it? I fill mine up to about 2" below the top. If I overfilled it will burp out the excess as it warms up. That is normal. The 1st thermosiphon system I had I thought it was getting hot. It wasn't! If circulation is good you don't have a problem. Stick a hand held thermometer in the top of the radiator and see what it says.   [Reply]  [No Email]
gene smith 07-31-2012 11:02:27 75.107.0.38 Report to Moderator	Re: overheating/Farmall A in reply to Dean Olson, 07-31-2012 09:28:56   Dean, thanks for a spot-on solution. The thermometer indicated 175-180 and no more! Still can hear rumbling and "boiling" sounds but she isn"t really overheated:-) How sweet it is.   [Reply]  [No Email]
Arnold Layne 07-31-2012 09:09:50 66.146.251.171 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 08:34:57   Is it overheating for real or just barfing water out when it gets warm?   [Reply]  [No Email]
gene smith 07-31-2012 09:29:52 75.107.0.52 Report to Moderator	Re: overheating/Farmall A in reply to Arnold Layne, 07-31-2012 09:09:50   It is really boiling. Block and radiator are way too hot to touch.   [Reply]  [No Email]
Red Dave 07-31-2012 08:58:36 66.216.141.163 Report to Moderator	Re: overheating/Farmall A in reply to gene smith, 07-31-2012 08:34:57   First, make sure that the radiator is full, the thermosyphon cooling system requires that the radiator is full for it to work. Also, if you have circulation, it should be cooling. A small amount of water pushing out the overflow is normal for these tractors. If you still have overheating problems, there are 4 small passages, about the size of a nickel, that the coolant has to pass through as it rises up through the block. They are beside the cylinder sleeves. If they get blocked, they will impede circulation, and they get blocked easily by rust & scale. The best way I know of to fix it is to take the radiator off, remove the lower water inlet and flush out the water jacket behind that inlet, making sure that you reach in and push water up through those passages, which are at the top of that water jacket. Flush up through the water jacket, and down through the upper water outlet. If you can get something in there to poke up through the holes to clear them, that would be good too. If that doesn't work, you may need to pull the head to flush it.   [Reply]  [No Email]
gene smith 07-31-2012 11:06:02 99.196.128.58 Report to Moderator	OVERHEATING Farmall A in reply to Red Dave, 07-31-2012 08:58:36   Problem solved with a thermometer. We didn"t really have a problem, it appears. Thanks for good advice.   [Reply]  [No Email]