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Garden Tractors Discussion Forum

Re: low coolant in ford 7000 diesel tractor

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joe csuti

08-23-2013 17:25:10
4.248.72.218



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Check the eng for visible signs of leakage at hose clamps,gaskets at any cast fittings for cooling system that bolt to block,water pump mounting gasket/shaft seal,around edges of head/block where they meet,thermostat gasket & intake manifold gaskets(if water cooled or used as a crossover for block cooling).If you can't find any visible leaks consider doing a pressure test on cooling system,you may have a internal head gasket/intake manifold cooling system leak,this might also be the cause of eng shutting due to coolant leaking into cylinder's after eng reaches operating temp.

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Richard E Gwinn

08-23-2013 22:31:27
71.251.54.58



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 Re: low coolant in ford 7000 diesel tractor in reply to joe csuti, 08-23-2013 17:25:10  
Hello Joe. Thanks for the advice on the ford 7000. I have checked closely for any leaks to the outside and there are zero leaks on the outside of the engine. I checked the oil and there is no coolant or water in the oil either. You were saying that maybe the intake manafole gasket could be leaking coolant into the cylinders? I think you may have somethingwith that one. the coolant drops but there is no visible sign of it leaking out anywhere. When the tractor is running wouldn't the drops of antifreeze rain down on me or do you think it would be so fine it wouldn't be noticed. I noticed that the radiator still has pressure on it when I open the cap after it has sat all night. I found the coolant really low that time and it still had some pressure on the cap. Do you think it would have pressure on the cap even after all night if it is leaking into a cylinder? Maybe it only leaks if the heat and pressure is high enough. After it cools and the pressure drops a little maybe it seals and stays like that the rest of the night? Do you think this is a possibility? I am not sure and don'twant to tear it down until I am certin of what the problem is. Looks like a heck of a big job to me. I really need my tractor however. I have a 125 achre farm in WV that I try to keep bush hogged on a regular bases or at least 2 or 3 times per year. She always runs good and doesn't use any oil between changes. It ran really good up until early last summer when she started shutting down with no warning. I was blameing the fuel system for that but maybe that isn't what is doing it. Good to know I will investigate some more. If you have any more ideas please let me know about them. Thank you very much. Richard,,,,

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joe csuti

08-24-2013 03:40:51
4.248.76.160



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 Re: low coolant in ford 7000 diesel tractor in reply to Richard E Gwinn, 08-23-2013 22:31:27  
If you have pressure in cooling system after tractor sits all night I would suspect a head gasket or manifold leak,but lean more towards a head gasket leak,gasket on head(s) may be starting to leak when eng gets hot,after you stop eng and it starts to cool down leak may stop but exhaust gas stays trapped in cooling system maintaining pressure in same,as far as coolant out exhaust it's probably evaporateing in muffler/exh pipe as it leaves eng.

This is why I said to do a pressure test on cooling system,it will help you track down/isolate problem when eng cold/hot(you'll probably have to remove thermostat when useing tester).If you can't borrow a tester most autozone stores rent them,just follow instructions included with same,worst possible case is an internal crack in block/head(s).


Years ago I had a similar problem with coolant loss on a 360 V8 eng,after eng got hot it started loseing coolant & I would have pressure trapped in cooling system when eng cold,I suspected a leaking head gasket/warped head,pulled heads twice & replaced gaskets plus had heads ground,still had problem,this problem bugged me for 6 months,I got mad one day & went to junkyard & got a used intake manifold,that cured problem,there was probably an internal crack in same between water crossover & heat riser passage for carb that would open up when eng hot,then when eng cooled leak would stop & exhaust gas would stay trapped in cooling system.

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