i have a valve related cover question for you.
both left and ride side of my center valve cover bolts rods are shredded (on the valve block side).
the bolts are double sided with reverse groves, the bolts now spin freely and pull any excess metal from the valve block, a proper seal is no longer there. i.e. oil leaks and generally undrivable. Does anyone have any experience with this who can help. short of buying new units, what is the best course of action, re-grove and use bigger bolt rods? then i would have issues with the original outer bolts. any ideas of engineering techniques would be welcomed.
1978 R80/7, newer type valve covers ;)