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I broke a valve cover bolt - unfortunately it wasn't one of the easy ones where the hole exits on the outside of the engine, this was the one on the left rear that exits inside the engine somewhere.

My question is, what's underneath this thing? If I drill it out, will metal shavings fall down the hole into the engine? If so, what can I do instead? There isn't enough of the bolt left sticking out to pull it out with plyers.
 

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Try dilling a pilot hole wth a much smaller drill bit that way you don't destroy the original threads.. if you can get ahold of a left handed drill bit it may actually unthread the bolt back out for you. otherwise don't drill through all the way. just enough to grab the bolt with a ease out and back it out. I don't think any of the valve cover bolts actually go all the way through. I think they are all blind holes. if you just snapped the head from overtightening it should come out pretty easily. A stuck , corroded bolt is going to be tougher. Good luck
greg
71 240z
 
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