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TE20 Overheating problem

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Roy Walsh

01-29-2007 16:09:37

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G'day, I have a TE20 which overheats & boils the coolant & evaporates the fuel. It is a 56 model and has what appears to be a new radiator. I took the thermostat to replace it but haven't put the new one in as I tested in a cup of boiling water and it didn't open. I have literally no mechanical skills which in this instance is a handicap and 100's km from anyone that wants to look at it. Any ideas would be of help. It runs OK although starts missing when it gets hot. The oil pressure guage usually sits at approx 65 then drops to about 40 when it overheats. Thankyou, Roy

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Jerry/MT

01-29-2007 21:07:55

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Re: TE20 Overheating problem in reply to Roy Walsh, 01-29-2007 16:09:37

Roy:
You sure it's a TE-20 not a TEA-20. TE-20 uses the Continental Z120 the TEA-20 uses the Standard Engine. The Continentals shouldn't have that high an oil pressure, don't know about the Standards. The Continental max oil pressure should be abou 30 psi and the minimum allowable is no less then 15 psi at hot idle. If you have a Continental and the pressure is that high, the relief valve is stuck and/or the oil filter is plugged.
When you fill the radiator, you are not supposed to fill it to the top of the tank. You fill it about an inch above the core. The rest of the room is for coolant expansion. If you fill it higher, the excess will boil out the overflow. Do you have a temperature gauge to tell you it's overheating? Or are you assuming it is because the coolant overflows? If it overflows on to your distributor or plugs that could cause a miss.
Another thing that can cause an overheating condition is too lean a mixture on the carburetor. Enrich the mixture by a half turn and see if that helps. The mixture adjustment screw is the big screw on the carb and you turn it counterclockwise to enrich the mixture.

You said that you covered your new thermostat in a pan of boiling water and after several minutes it didn't open. It may be defective if this is what you did.
Are you running with a pressure cap on the radiator? You should have a 7 psi pressure cap and if your pressure cap is missing or is faulty, that could cause an overheat.

Two additional pieces of advice. Get youerself a Ferguson Shop Manual for this tractor. It'll be a great help even though you disclaim any mechanical skills. A willingness to learn will go along way in working on these machimnes. They're not the Space Shuttle and they are relatively easy to work on. Also, ask this question over in the Ferguson Forum on this site. There's a English fellow, John(UK) that's familiar with the Standard Engine that can hep you on that engine and the TEA more than I can.

Hope this helps you.

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