There are two oil senders on the right side of my 83 280ZX block that I am putting in my 240. The one part I threw away, a short sender switch with a fuel injector type (2 electrical pins) cnnnector is all that is keeping me from starting it up. It goes behind the oil filter (the other one is the canister that goes in front of the filter) and towards the top of the short block. Seems like it would be a oil temperture sender, but I can't find it anywhere on the microfiche at carfiche.com.

What the heck is it?

What is the nissan part #. I would get a plug, because I don't need the switch but the hole appears to be some funky pipe thread pitch (spec).

Not exactly sure, but I believe that is the coolent temp, not oil. The later ZX's moved one of the coolant sending units from the front cover/thermo housing and put it on the side of the block.

Yes, it is an engine temperature sender that talks to the FI computer. The F54's have them, but the N42's don't.

steve

The sender switch goes in a raised boss area directly on the block about 2 inches behind the oil filter. It is directly in line with the top of the oil filter, not quite as high up on the block as I indicated earlier.

Anyone know what it is?

Does it control the fan motor that blows air through the valve cover splitter onto the intake side of the engine? Seems kind of strange to use oil to trigger that fan, so I don't think that is it.

I'm sorry...got to thinking about it and I was wrong. The thermistor is in the HEAD just above and to the left of the oil filter. The other port in the BLOCK just above and to the left of the oil filter (drilled and tapped on some f54's blank on others) is for the knock sensor on turbo motors. There is nothing inside. It is not a water jacket nor an oil galley. Quite useless, I suppose...

steve

Funny, mine is not a turbo engine. It is an 83 though. Perhaps the latest 83's had knock sensors. I am thinking it taps into an oil gallery...

I'm going to go blow compressed air in it and see if it goes anywhere. I should be able to hear I hope...

It goes nowhere. Quite empty. You can leave it open if you choose (mine is). The knock sensor operated not unlike the car alarm sensors that detect breaking glass. I have an 81 N/A side-by-side with an 82 N/A in the garage and one is blank and one is drilled and tapped. Both were off non-turbo motors (but I guess I already said that!).

steve

Thanks ZVoiture. I put compressed air on it and it didn't go anywhere--- it is in the car, so I can see it very well. Well, that saves me a lot of trouble. I don't have to order anything to plug the hole!

Thanks!