Posted by JCinKY on September 22, 2012 at 18:36:05 from (166.147.120.144):
In Reply to: 8N oil pressure posted by labman98 on September 22, 2012 at 18:25:19:
Lab...my 50 8n is the same way. 25 cold, 8 hot. I rebuilt mine with bearing, rings valve job AND rebuilt the oil pump. My "cap" was scored as well. Sand out any grooves with emory on a piece of glass to stay flat.
Oil pump should have a gasket. I set end play by installing drive gear until too tight to turn by hand then back off until free. Housing could be worn, pressure relief spring too loose (easy fix, stretch or I bought new). You can also lose OP in the cam. Check cam bore in block and cam journals to nominal.
My crank plastigaged to 003 on rods and mains. Looking for a cam, don't want to bore and install bushings.
Oh yeah...galley plugs in? 5lbs not terrible will run a long time on low OP. Just don't idle all day.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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