Oil Pressure Sending Unit

[jello67]

As per previous thread, I'm working on a spare engine. It's a 2.7 7R case with RS pistons, and solex profile cams.

I have early (green lettering with a chrome ring) gauges in my car (although not original to the car).

I have an oil pressure sender at the front of the engine - pictured.
I also have the pressure fed cam chain tensioners, so I have an oil pressure sending unit housing at the back of the engine. It is blocked with a plug - also pictured.

Is there a good reason to use one location over the other? Can the other location be used for some purpose as well?

[02jake]

allot of the engines use the port by the thermostat as a oil pressure switch(dummy light) and put the oil pressure sending unit in the oil feed port. I like to use both, a bright light will catch your attention when driving.

[jello67]

I had to look into this. I guess I have the luxury version of early gauges:
- Furthest left is fuel and oil level - no lights
- Next over is oil Temp and Pressure with two lights - one for the handbrake being on, and one for the alternator (and or belt to it) warning light
- In the middle is the Tach with turn signal indicator and high beam indicator
- to the right of the Tach is the Speedo which has a green parking light indicator
- furthest to the right is a clock. In theory I could replace the clock with an "outside temperature" gauge that has a light for anytime the outside temp drops below freezing.

There is an alternate gauge arrangement where:
- Furthest left is fuel with a low level warning light
- next over is oil temperature with 3 lights - my owners manual doesn't say what they are.

Either way it doesn't appear to me that there is a low oil pressure idiot light on my early car.

[phunt]

I think jello is right. on cars with 5 gauges the oil temp oil pressure gauge does not have low pressure light. the 3 gauge cars which I don't think are 911. the fuel level and temp gauge has 3 lights. handbrake alternator and low pressure. my engine block is a 3.0 and has pressure take offs in the back and in the front. my gauge came with appropriate sending unit which I installed in the back. easier to get to maybe? the front I used an old sender that I may wire to a light. I have a custom 3 gauge cluster from like a 356 so I do have an extra light.

[phunt]

whoops did same picture twice sorry

[Rosco_NZ]

Early cars don’t have low pressure light … despite the handbrake light in the ‘oil gauge’ having OIL written right above it ..

[Bend911]

You could consider a custom gauge to get the light. JBELL959 made some for me and they're works of art.

[PeteKz]

I think a buzzer is better. It will get your attention no matter where you are looking (hopefully at the road).

[Rosco_NZ]

I installed a dual switch sender in my car, one drives the sender, the other a buzzer. This stays off once the car is running. I’m currently running 20W60, the buzzer would trigger at idle with lower weight oil.

[john walker's workshop]

Yer thru-bolts are on backwards, fyi.