So... this was in my oil drain pan...

[Dynomite]

A new oil pressure sensor for the gauge is relatively inexpensive and very easy to replace.

Jerry has 16 in stock

[Locobob]

Originally Posted by XfireZ51

And Bob, your not seeing any oil leaks anywhere?

I haven't noticed any

[Locobob]

Originally Posted by wfot

I suggested the rear cam plug a while back, it does appear to be too small, it is 3/8 roughly across the threads. picture is of the early cams '90 - '92

Also I agree with marc, that tray is pretty tightly spaced, I do not think a .525 plug will make it passed the tray

Also I agree with Jerry that the cam plug can sneak down an oil port

I just do not see another spot where a .525 plug can come from based on looking at my bare heads and block.

Is it possible that some cams have a rear .525 plug?? or are they all identical.

I fear that it is an actual drop in oil pressure and idling and light driving will not pose a problem, but if you lean on it, the lack of pressure will show up as a cam or bearing problem..

John

Thanks for the pics. Yeah Marc just further confirmed the cam plugs as 1/8 NPT and apparently the only 1/4 NPT plugs in the head are the ones up by the cam chains where there is not really a feasible path into the bottom of the oil pan.