Oil temp sending unit seal

[wirejock]

IO-360-M1B
A friend spotted some oil during my Condition Inspection. I found the source. The oil temp sending unit. Its just forward of the oil filter. It has a soft copper gasket similar to the oil screen. It was installed135 degrees past finger tight.
I put a wrench on it and it wasn't tight, but that's probably the way those crush gaskets fit.
Questions
1. What is the part number for the gasket?
2. Is there a better option?
3. Is 135 past finger tight correct?
4. If not, what is correct?
Thanks in advance

 

[nitrohog]

The general rule is if the fitting is 12 threads per inch, the torque value is 90 degrees past finger tight and for a 16 pitch it is 135 degrees after making finger tight contact. Check closely for damage to the housing and sensor, that will cause them to leak. I have also seen the sensor itself leaking and look like it is the gasket.

 

[wirejock]

The general rule is if the fitting is 12 threads per inch, the torque value is 90 degrees past finger tight and for a 16 pitch it is 135 degrees after making finger tight contact. Check closely for damage to the housing and sensor, that will cause them to leak. I have also seen the sensor itself leaking and look like it is the gasket.

Thanks
I think I may have identified the problem. Another thread is mentioned to drill or use a worm clamp to safety wire the sensor. I suspect it backed off.
I ordered a couple replacement washers and will reinstall it.

 

[Ralph Inkster]

1. Part#, last time I replaced temp sender seal I took the sample to my local auto parts store. Less than a buck.

 

[wirejock]

1. Part#, last time I replaced temp sender seal I took the sample to my local auto parts store. Less than a buck.

AN900-10, MS35769-11

 

[lr172]

Thanks
I think I may have identified the problem. Another thread is mentioned to drill or use a worm clamp to safety wire the sensor. I suspect it backed off.
I ordered a couple replacement washers and will reinstall it.

Yes, those type of gaskets absolutely REQUIRE safety wire, as they easily back off. You could also use an aluminum crush washer and those get enough torque to not back off and save the hassle.