major engine pressure test

spannerpete · Mar 12, 2017

i am going to do a air pressure test on my major 1957 model stripped old injector to do the job can anybody tell me what pressure i am looking for unburnt diesel coming out exhaust removed manifold number 4 wet inlet port ground the valves and no back pressure at dipstick can you help thanks spannerpete

derwen1959 · Mar 12, 2017

have you tested injector in number 4 cylinder as this could be faulty

spannerpete · Mar 12, 2017

all serviced and injector pump and injectors

Majorman · Mar 12, 2017

How long and how hard have you run the tractor? If you do not work them hard, especially after an engine overhaul or if she has been doing a lot of ticking over you will get oil in the manifold which can be confused with unburnt diesel. Been working on these tractors since the 1950's over here in England with the largest Ford dealer in the country at the time and never saw one blow diesel out of the exhaust without a major injection fault that would lead to an engine hydraulic lock.

If you can get her on some hard work, on a cultivator, plough or tiller for a couple of hours you may find your problem goes away.

spannerpete · Mar 12, 2017

could not agree with you more ran here about 3hrs no problem now she is putting diesel out here is what i did removed head ground valves thy werent bad sent injectors and injector pump of all serviced ran her 3hrs log splitter and at the end of 3hrs exhaust wet and spots of black diesel or oil all over4 her there is no back pressure as you can rev up remove the dipstick almost nothing removed exhaust and inlet manifold number 4 is wet on the inlet number 4 piston had a bit more movement than the rest but barely noticable i jest notice white scum on rocker cover that was not there be fore the old engine oil is still there so looked at it no water in it tractor was sitting around for 20yrs plus water was rusty in colour and thats about it your re ply will be great thanks

DGinVT · Mar 12, 2017

My new 2600 Ford (1980 just bought from the dealer), did exactly that. It slobbered oil out the exhaust. All I did was to work that engine hard under a good load,then engine's rings finally seated, and I never looked back. Last spring, April 2016, due to old age, I had to replace two seals, one on the injector pump's throttle lever and the second on number four's return line.

flyfifer · Mar 12, 2017

I would agree with Majorman, it is more likely to be oil, if it was unburnt fuel in the exhaust it would give you white smoke.

I once done a ford 4000 for a farmer, it spent day in day out sitting driving a small water pump under light load conditions for a few months and glazed the bores.

This was cured by getting the farmer to plough a 10 acre field as deep as he could with a double furrow 16 inch plough.

major engine pressure test

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