Idiot Light

[khryslerkid]

Who's using their low oil pressure light with a high volume oil pump?

Reason that I ask is I had a 383 years ago, installed a high volume oil pump and blew the sending unit apart. This was a guage sending unit with the larger "can" looking unit.

This application would be for a light "small" sending unit. I already have a mechanical guage, I would just like to have the light working for a "In your face" warning.

Thanks in advance!

 

[moparedtn]

Kept mine...

 

[mopar 3 B]

I have blown the back out of an 80 psi pressure gauge but neither the idiot light or electrical gauge unit.

 

[oldbee]

Can't believe the small sender wouldn't work.

 

[Mick56]

The large sender is for a gauge. The small one is for the light.

 

[khryslerkid]

Can't believe the small sender wouldn't work.

I'm thinking the same. That's why I'm asking, to be sure.

 

[oldbee]

AND there's always the Chinesium worry!

 

[Darter6]

I always hook the light back up if so equipped and use the small one.
If not I have installed a aftermarket light.
Funny I have had the can one blow out/leak but never the small one.

 

[Moparnocar]

The large sender is for a gauge. The small one is for the light.

Good to know, I replaced the large one and my light is still on

 

[khryslerkid]

Bought the Standard brand PS11 for a light. There is a PS11T which is the lower grade switch, looks just like the OEM. Something about the quality of the internals. The PS11 that I bought is rated at 3 to 9 psi activation pressure.

The ports on the back of this 1967 440 are two different sizes. The factory location is 1/8" npt thread and the right side is 1/4" npt. The original 361 that came out of the car has both 1/8" npt.

This video is doing a cold crank. It's been sitting for a couple of days. I'll crank the engine without touching the gas or using the choke until the light goes out. Helps with priming the oil and the carburetors.

 

[Nate S]

I don’t use an oil pressure gauge but bought the 30psi idiot light switch. Can’t imagine waiting for 6 psi to scream in terror and shut it off.

 

[khryslerkid]

I don’t use an oil pressure gauge but bought the 30psi idiot light switch. Can’t imagine waiting for 6 psi to scream in terror and shut it off.

I think you have this backwards. It's 3lbs to 9 lbs to activate the light. If the pressure drops down 3lbs to 9 lbs the light will come on. Anything over this pressure the light will go off. Just like the factory designed it.

 

[Fran Blacker]

You have me confused. Nates idiot light comes on if oil pressure drops below 30 lbs. You word it the light comes on at 3 to 9 lbs. If it drops 3 lbs to 9lbs it comes on. ????

 

[khryslerkid]

You have me confused. Nates idiot light comes on if oil pressure drops below 30 lbs. You word it the light comes on at 3 to 9 lbs. If it drops 3 lbs to 9lbs it comes on. ????

Never heard of such a thing. Does it kill the engine too?

 

[mopar 3 B]

If the light comes on at 3 to 9 ouch engine rebuild time.

 

[khryslerkid]

If the light comes on at 3 to 9 ouch engine rebuild time.

That's what the specs were in the Standard book when looking up the part. I'll have to look at it again tomorrow. Hell I wouldn't want it coming on at 30 lbs. It would be on every time I'd pull up to a stop sign.

I'll compare it to the guage tomorrow and see what it's doing.

 

[mopar 3 B]

That's what the specs were in the Standard book when looking up the part. I'll have to look at it again tomorrow. Hell I wouldn't want it coming on at 30 lbs. It would be on every time I'd pull up to a stop sign.

I'll compare it to the guage tomorrow and see what it's doing.

I could see 10 to 15 and leave some error of margin. I get kind of antsy if it even drops below 20.

 

[Nate S]

I think you have this backwards. It's 3lbs to 9 lbs to activate the light. If the pressure drops down 3lbs to 9 lbs the light will come on. Anything over this pressure the light will go off. Just like the factory designed it.

I wasn’t thinking of the hysteresis. Even worse. The 30 psi switch actually tells me something I want to know.

 

[moparedtn]

Huh, that's odd....
I just consulted the FSM and they don't mention an actual number considered to be "low" -
or even what the switch should operate at?

 

[Nate S]

Huh, that's odd....
I just consulted the FSM and they don't mention an actual number considered to be "low" -
or even what the switch should operate at?

Agreed, not there. But the replacement units usually have that in the spec.