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1960 Cadillac 390 oil pressure sensor port

Started by Tom Hoczyk , CLC 14044, June 01, 2015, 10:00:49 PM

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Tom Hoczyk , CLC 14044

Only about 3" from the oil pressure sensor on the 390 engine is another 1/8" NPT port that is plugged.  Does anyone know FOR SURE if this is also an oil passage so that another sensor can be installed to actually read oil pressure on an accessory gauge?
Tom Hoczyk

curly

I don't know for sure, but I installed a "T" under my factory sender and installed an electric sender there.
I hid the gauge in one of the Ash Trays.

T Lewis

76eldo

Yes it will work for a mechanical oil pressure gauge.

Brian
Brian Rachlin
Huntingdon Valley, Pa
I prefer email's not PM's rachlin@comcast.net

1960 62 Series Conv with Factory Tri Power
1970 DeVille Conv
1970 Eldo
1970 Caribu (?) "The Cadmino"
1973 Eldorado Conv Pace Car
1976 Eldorado Conv
1980 Eldorado H & E Conv
1993 Allante with Hardtop (X2)
2008 DTS
2012 CTS Coupe
2017 XT
1956 Thunderbird
1966 Olds Toronado

Jeff Rosansky CLC #28373

Keep in mind that it depends on where in the run it is..... At the beginning, you will have instant oil pressure, at the end and it will take 20 seconds or so when cold.
Your concern will be hi oil pressure if at the beginning of the run, because that means there will be a blockage somewhere.  Low pressure at the end is what we all would expect.
Jeff Rosansky
CLC #28373
1970 Coupe DeVille (Big Red)
1955 Series 62 (Baby Blue)
Dad's new 1979 Coupe DeVille

76eldo

Can you explain what you mean?  I'm not sure what you are referring to my the beginning or end of the run.

Brian
Brian Rachlin
Huntingdon Valley, Pa
I prefer email's not PM's rachlin@comcast.net

1960 62 Series Conv with Factory Tri Power
1970 DeVille Conv
1970 Eldo
1970 Caribu (?) "The Cadmino"
1973 Eldorado Conv Pace Car
1976 Eldorado Conv
1980 Eldorado H & E Conv
1993 Allante with Hardtop (X2)
2008 DTS
2012 CTS Coupe
2017 XT
1956 Thunderbird
1966 Olds Toronado

Jeff Rosansky CLC #28373

Imagine the flow of the oil out of the pump.  It either hits that port first, just as it comes out of the pump, or at the very end just before it circulates back in the sump.  So, you will either have instant oil pressure, or nothing for a few seconds until the system is pressurized. 
Now, if there is a blockage in the system and the pickup is at the very beginning of the run, then you will have hi oil pressure because the oil comes out of the pump and is blocked...so it will have pressure.
I am over analyzing this.  Just making mention for conversational purposes.  It's just that we are taught to watch this with the airplane because one type of engine has the pickup at the beginning, and the other has it at the end.  Just don't be surprised if there is a delay for a few seconds after engine start before the oil pressure kicks in.
Sorry for the confusion.
Jeff
Jeff
Jeff Rosansky
CLC #28373
1970 Coupe DeVille (Big Red)
1955 Series 62 (Baby Blue)
Dad's new 1979 Coupe DeVille