Hi gang,

Installing a new fuel sending unit (top loader for a '78 280z) but don't remember which direction the arm is supposed to face once installed (towards the front of the car/rear/left or right side).

I keep bumping the internal bits of the tank during installation and once almost ran out of gas because the arm must have been jammed up against something in the tank denoting a full tank on the gas gauge.

Any idea which way the arm is supposed to face once installed in the tank for a '78?

 

-chase

Does this help?

http://www.carpartsmanual.com/datsun/Z-1969-1978/engine-280z/fuel-tank/from-jul-76

So if this is accurate in terms of install direction and not just facing that direction for ease of drawing, that would mean that the float should be pointed to the front of the car?

Are you sure that it will actually lock down in a backward direction?

I was thinking the spaces were different sizes when dropped back in. Two were smaller than the other so it could only go one way. It's been many years so I'm most likely wrong.

 

Zed got it above me.

Weird - mine you can pop in and just spin around.  No "keyed' edges on mine I believe...

This here is the tab that you see when you take the ring off. The sender body has the matching notch. 

Edited March 27, 20204 yr by zKars

great to know - I'll go give it a look, thanks!

4 hours ago, zKars said:

This here is the tab that you see when you take the ring off. The sender body has the matching notch. 

Actually hold on, isn't that dimple on the retainer ring and not the fuel sender unit itself?

Look at the tank, not the ring. There are three raised tabs that the lock ring, locks under but at Zed's arrow there is a piece of metal that is folded down. There should be a notch in the edge of the sender that aligns with that piece of metal