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Re: Re: Re: Re: Low Oil Pressure in Super A - Oil
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Posted by Stan(VA). on November 26, 2003 at 07:22:47 from (206.71.102.144):
In Reply to: Re: Re: Re: Low Oil Pressure in Super A - Oil Pum posted by Buster on November 26, 2003 at 06:46:43:
Wayne & Buster, A common issue with the oil pump is the bottom plate on the pump will warp and the gasket will blow out on the edges near the pump gears. Remove the plate, mill it flat (or just touch up on a belt sander if not to bad) and install with a new gasket. Only semi-tricky thing is to hold against the pressure relief valve and spring as you reinstall the plate. Another thing related to oil pressure problems is the bearing caps. Three of the last motors I've worked on had bearing caps swapped. Two had main caps swapped (hard to tell without measuring because they're not marked) which resulted in crank being too loose on one bearing and too tight on another (unless run for awhile in which will end up loose on both). We are talking obvious loose here, both motors were M/SuperM's that had an audible clank if you grabbed a loose fan belt and pulled on it as the crank shaft moved slightly up and down, or gently lift on the flywheel with a long screw driver checking for play. The third (a C/Super C?) had two of the rod caps swapped. This was easier to spot because the rods are stamped with matching numbers (I think on the cam side), but more damaging as it spun one bearing and was trying to spin the other. It also had metal grinding off the sides of the swapped rods. Remember that each of the main and rod journals are machined as a matched pair and must stay together. Each of these engines ran and maintained various degrees of oil pressure when cold, all dropped fairly low warm. From my experiences, these are the areas I check first. Good luck, Stan(VA).
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