8.1 Oil Pressure and Filter
Last oil change I installed a Fram Ultra Guard since the Wal-Mart by me stopped carrying AC Delco filters. Local auto parts stores don't seem to carry the AC Delco filters either. Right after that I...
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BurbMan wrote:
AH641, thanks for posting that, and making me feel lazy for not digging the service manual out of the garage and looking it up myself. But given that the 8.1 is not referenced tells me it may be different. I'll see if I can find it in my Helms manual and post.
It took a marine 8.1L mechanical service manual but I found it. There is a flow diagram with it, that looks very similar to what was already posted.
The oil is drawn from the oil pan through a pickup screen and tube, into the oil pump (7). Pressurized oil flows through the oil filter, into the oil cooler (5), back into the engine (6), up to the oil pressure gauge port (2) and rear crankshaft bearing, and is then distributed to the upper oil galleries.
I also found several sources that show min pressure as 5 at 1,000 and 10 at 2,000. I found a different min rating (2 ratings 1 manual) that says 6 at 1,000, 18 at 2,900 and 24 at 4,000.
