Check out what popped a hole in my upper timing chain cover...

[Jtuner]

Sooo about 40k ago I replaced the entire timing chain assy.. Did the water pump, chain, sprockets, pulleys, the whole 9 yards.. When I reinstalled the guide rails, I felt iffy about one thing and one thing only.. this damn hollow threaded thing that just seemed to thread in and sit in there with no other fastening.. I put it back in the same way it came out, but now, about 6 months ago when I parked the car, a hole had appeared in my upper timing chain cover, and oil was spraying out everywhere...
This was the culprit

http://www.flickr.com/photos/50383493@N04/4685303872/

It sits at the top part of the driver side longer chain guide rail.. Did I miss a bolt that was supposed to go through it er?
Mostly I'd like to know if its essential and needs to go back in.. if so, it looks like there's a fillister head bolt that may go through it, that would make sense to fasten it down.. either way I'll need to get a new one, or not put it back in... suggestions? comments?

[B318M42W]

would like a pic of the hole in the timing case plz:D   Pics of odd stuff is fun

[KenC]

There's a slot for a flathead screwdriver in it. You tighten it until it seats on the rear of the timing case, and the. It's held in with a bolt. It's there to stabilize the top of that chain guide.

[colin86325]

There's a slot for a flathead screwdriver in it. You tighten it until it seats on the rear of the timing case, and the. It's held in with a bolt. It's there to stabilize the top of that chain guide.

+1

I believe this was an M44 introduction that is now standard for the M42s.

[Jtuner]

would like a pic of the hole in the timing case plz:D   Pics of odd stuff is fun

Will do It was friggin scary to see a hole blown through the damn thing from the inside out.. I must have missed putting that bolt through the threaded thinger can't believe it lasted 40k miles lol! Still gonna double check the oil pan for a bolt flyin around in there.. thanks for the info guys!