Opp's, help. Identification needed

[FoxTVR430]

So I am rebuilding the oil pump and cleaning painting the sump pan etc.. on my 1993 (pre-serp) engine.

I have found an (extra) screw!!
The dreaded scenario

The question is, if someone could help me identify this little screw!






Cheers
Simon

[FoxTVR430]

Hi Steve,

It was with the parts I dismantled.
I actually took a picture at the time when taking the oil pump apart, see below.
But I cannot remember where came from. I have looked inside the oil pump housing and there is just no place that I can see that it could come from.
Maybe, has it something to do with the oil pressure relief valve?

[FoxTVR430]

Steve_D said:

That style of grub screw is designed to lock something like a pulley onto a shaft. The cup and knurl bite into the shaft to give a good lock.
Can't think where this would live on a pre serp oil pump.

OP were you stripping anything else at the same time? like bottom of dizzy etc.

Steve

Hi Steve,
To answer your question. No I was not. The Dizzy I took out some time ago and is safely stored.
Thinking about this again. I do not remember using my allen keys for the last a week or so.
This is a puzzle.
Simon

[FoxTVR430]

N7GTX said:

Check the upper timing chain sprocket. If it is the vernier type there should be 4 locking grub screws.

https://rimmerbros.com/Item--i-610289V

That could be an idea. But I would have to take the timing cover off, wouldn't I?
That would be a right pain.

[FoxTVR430]

Thanks for all the reply's.

I think you are right, it probably was in the oil pump pressure relief valve as a spacer.
Hence the photo of the end cap copper washer and the crub screw, above.
Great to get have you all out there.
Simon