Oil pressure sender seal

[rlane]

Looks like the seal/spacer for the 1973 oil pressure sender unit is NLA.
Anybody aware of sources or a substitute?
I think it is 18 mm inner diameter but not sure of the material or thickness.

[Early_S_Man]

Richard,

Per the diagram below ...

If the engine is MFI, the oil hose to the injection pump has a steel ring approx. 18 mm ID, 25 mm OD that fits under adapter #46 ... and two A18 x 22 sealing rings -- 900.123.044.30, #44, are used above and below the pressure-tapped ring at the end of the MFI hose. Non-MFI 911T engines, and later 911SC emgines mounted an oil pressure switch #49 onto a shorter adapter, #45 -- 901.101.175.01.

On 911T-K engines, the pressure sender was relocated rearward as on later engines ... and an M18 x 1.5 plug -- 900.124.006.02 capped the hole.

[rlane]

Warren,
I should have noted this is on the 73 with a 2.7 L (7R case).
I may have confused the issue in my message because I need the specs on the seal/ring #48( I thought #47 was the oil presure sender?)
I am planning on removing the whole block and removing the sender in the vise as numerous threads have mentioned, to prevent a possible terrible screwing up of the case threads.
I have checked the wire and connection and feel sure it is the sender and not a bad connection/ground.

[Early_S_Man]

#47 is the oil pressure sender, but only on '73.5 CIS 911T-K engines ... and later 2.7 & 3.0, 3.2!!!

#48 -- 900.123.009.20 -- 18 mm x 24 mm sealing ring ...

[rlane]

Thanks Warren
I think I was confused, that sealing ring should fit my car as the NLA sealing ring is for a 73 (MFI) engine)