espace 2.2 12v t/d cranking over oil pressure only 2lbs per sq inch, cleaned pump strainer, relieve valve free, fitted oil pressure test gauge, checked it with a second test gauge, both read same, new oil, new filter,pump pumped oil on bench in tank but without any back pressure,is there any where in the block that could be relieving the pressure , built it back up slackened oil cooler flange plate turned over engine plenty oil flow ?.
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