The plain bearings in normal internal combustion engine do not rely on oil pressure to float the insert over the journal. They rely on a continuopus supply of oil to refresh that squeezed out. If the pressure is sufficient to get oil to the bearings, it will be fine. Exceptions are bearings and pistons cooled by the oil. The reduced flow of near no pressure can overheat journals that are subject to high temp. Jet orifices directed to piston skirts that do not supply sufficient volume far enough will cause burned pistons and siezed engines. Engines with hydraulic Lifters or other hydraulic Oil pressure related adjustment systems (including cam timing) will not be happy. Old simple tractors live with little pressure for a long long time. (not recommended) Jim
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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