I had this same problem with my first car, '70 Nova with 307 V8, used a quart of oil every 100-125 miles. Talked to a boat load of mechanics before one said it was the o-rings Chevy used as oil seals on the valve stems. He said engine had probably been OVER-HEATED a time or two, o-rings got hard and brittle and broke. I made an appt and took the car in on the way to work. He ran one side of the engine while I watched. Screwed a broken spark plug with air hose connector into plug hole, turned air on to hold valves closed, seals were missing on half the valves, broken and just sitting there on couple more. Install new o-rings, replace valve springs, and keepers, move air fitting to next hole and repeat. He did say my valve guides were pretty loose, another sign of the engine being hot. I drove the car over 500 miles before adding a quart of oil after that. Then between 350 and 400 for the 2nd quart, then 250, then settled around 100-110. I looked for better heads, better complete engine, traded the car for a new Firebird. Engine didn't leak, didn't smoke, had good compression, didn't foul plugs. Actually ran like a raped ape!
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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