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Oil Pump Pressure Relief Valve
- This oil pressure relief valve is not from my lotus,
but an old unit.
- It shows how scoring and burrs can build up over time,
and perhaps cause sticking valves !
- Removal is relatively straight forward, remove the
circlip and it will all come out........well that's the idea,
- sometimes you need to work on the retaining cap with
the o ring to get it out, keep tapping it into the housing
- with the spring forcing it back again, lots of wd40, it
will eventually come out. . Job can be done without
- removing the whole pump cover, but to do a proper
deburr job I'd would. There is supposed to be special
- sealant used on the pump cover to timing cover.
- I used some 6000grit wed n dry to smooth the burrs,
especially the edges until
- the valve spindle slid into it's housing smoothly.
You're not looking to remove all
- the scoring the thing will end up undersize !
- Very light rub down of the hole that the valve slides into helped aswell,
especially
- near the end where the cirlcip locates as this was a little corroded.
-
- Makes you wonder where some of the scoring comes from
as the whole
- thing is bathed 100% in oil, all the time !.....I've
seen a low mileage one
- with similar marks, I think the assy process when new
is not done with
- much care. Oil Path....?
Sump->Pump->Valve->Filter .......maybe it gets fed
- lots of crap before the oil is filtered, especially
after engine work ??
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