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Low Oil Pressure-What Now?
Posted by Tom (more from Tom) on Mon, 25 Mar 2002 19:32:05
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My 1989 900 with 196,000 blew a head gasket. Following replacement the oil pressure light flickered on at low RPM. A thousand miles later it stayed on at driving speed and the engine was obviously oil-starved. The mech. says there was a piece of metal in the oil pressure relief valve so the flow was through the by-pass. With the obstruction gone, the top end noise is down and so is the oil pressure-to about 10 lbs.
What now? The reliability is probably very low, but for round town driving may be OK. Is the low pressure likely due to wear in the pump or slop at all the bearings? Has anyone tried chemically de-sludging to clear the sump screen? Would high viscosity oil make a difference?
The car is otherwise in poor shape so it doesn't make sence to do anything heroic.
Thanks
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