Missing bolt and what is this?

[jaydeluxe]

I was changing the top engine steady rubber bush when I noticed this yoke was missing a nut & bolt (the one on the farside that is out of view)



1. What is it?

2. How bad is it to not to have a second bolt on that?

3. I think it needs a bolt to be threaded down into the block and then a nut to tighten it on? Is that right?

Thanks!

[BERT]

It's a breather for the engine,someone probably removed it to do the steady bushes before and didn't bother putting it back on as it's awkward to put back on

[jaydeluxe]

I take it that I can't just screw a bolt into it?

[woody]

What is actually missing ( I think) is a stud with a nut and washer. Because its going into alloy the thread on the bottom of the stud will be different from the one you see on top. It will be a UNC thread. You can replace the stud with a UNC bolt.

[Dilogoat's Gruff]

Have you got some oil spattering on that side of the engine? It's not the most important part on the engine but I would put one on if you have one.