740 Hole in block? threaded

[PEGASUS 6]

I have had a mystery leak for a while. I was pretty sure it was the Oil return from the Turbo. resealed and still leaked- B230FT 1990

Today doing motor mounts, I saw this hole -

What is this for? Before I bolt it closed I wanted to check with you first TB.

I am pointing at it with the file in the pic, just dead left of the oil return

Thanks Guys and Gals

 

[vlvman]

That is where the old sensor for the volvo mono tester tool was mounted. It was used for checking ignition timing.

 

[500dollar744ti]

to add to that, it serves no purpose and is not the source of any oil leaks.

do not bolt anything into the hole.

 

[PEGASUS 6]

okay to leave threaded hole open then? or..

what do you do with it?

 

[500dollar744ti]

just leave it alone. it's ok trust me, there's nothing but air on both sides of that hole. you put a bolt in there and you might mess up your flywheel/flexplate.

 

[PEGASUS 6]

Thank you Sir

 

[yarchlrl]

looks to me like ur valve cover gasket is shot...