motor knock 3 cylinder ford gas

joe201 · Nov 28, 2014

I have a 73 ford 2000 3 cylinder gas tractor that I cut about 3500 bales of hay a year. Great tractor have been cutting hay for 6 years with tractor.Tractor will start if it spins over one turn.If I use the tractor every couple of weeks all is great. If I let it set for a month or so when I first start it it will make a knocking noise until low oil light goes out ( maybe 3 or 4 secs. If tractor sets for a while I usually pull the throttle full open and spin it over until oil light goes out and push throttle up and let it start and no knocking noise.Thinking about putting a oil gauge with needle to see what pressure is. does this sound like oil pump,or relief valve.This summer I pulled the valve cover off and started tractor and was oiling rocker arms as soon as it starts. Or should I be thinking about changing main and rod bearings.What do you guys think would be best to do, strong motor runs great and doesn't use any oil.
Thanks joe

old · Nov 28, 2014

You would be better off asking this in the Ford Forum.
That said likely you have oil that is to thick or your oil pump looses prime which running say a 20W-50 or a 10W40 oil may help

BANDITFARMER · Nov 28, 2014

Easy thing to do is add a bottle of STP and it will solve the problem. Your engine is wore and the STP will help take up the slack so to speak. I have a 95 F350 with 300000 miles that without the STP it would scare you to death to hear it start up after it sit a day or two, With the STP it could sit a month and start it up like a new one. It really helps. Bandit

David G · Nov 28, 2014

I do not see what weight oil you are running.

S2710 · Nov 28, 2014

I had a Ford pickup with a 300--6 in it and every time I changed oil it would knock till you built up oil pressure, so I would guess that your filter is draining and yours is knocking till the filter is full again. Does it do it all the time or did it start after you put a different filter on? The reason I ask that is maybe your filter has a faulty check valve in it. Just thinking out loud.

Bob

Mike(NEOhio) · Nov 28, 2014

My 68 2000 has an occasional knock at slow idle. I wouldn't worry about as long as it clears up quickly.

wvfarmboy · Nov 28, 2014

u need a better oil filter like hastings cheep filters do it every time and u might add stabliser to your oil

wellmax99 · Nov 30, 2014

I had an old chevy 6 cylinder truck that would do that as the oil filter was mounted at a 90 degree angle to the engine. with a cheap oil filter the oil would leak out of the oil filter when truck had been setting for a while,

old guy at the parts store told me to try a Baldwin or Hasting brand filter (higher end filter) with a better back flow valve,

better filter solved the problem,

another old chevy with tappet the made noise from time to time, a bottle of lucas oil stabilizer in the oil at oil change stopped that noise.

both of these motors were in good shape but had noise issues from time to time.

motor knock 3 cylinder ford gas

joe201

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old

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BANDITFARMER

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David G

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S2710

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Mike(NEOhio)

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wvfarmboy

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wellmax99

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