Low Oil Prssure on New Engine Rebuild

[S J & I Santoliquido]

Alan;
I recently had a loss of oil pressure on my CGT NG engine. It turned out to
be a failed filter. But what's interesting is that the only blockage was at
the internal check valve in the oil passage to the head (presumably there to
maintain the passage full of oil when the engine is shut off). I don't know
if all I5s have this, it showes up as part # 077-103-175-B on Pictures. And
it is accessable by removing the oil pressure sending unit, reaching a 6mm
allen wrench into the passage, and unscrewing the valve. You can then
inspect the passage for blockage. Incidently, That passage is fed from the
supply side of Main bearing #3, which in turn is supplyed directly from the
main oil gally.
Steve
87 CGT