>>>*If the chain has cut so deep it is getting into the head, replace the timing cover. (The grooves won't hurt the head.)
*Almost without fail, the grooves in the cover will crack right along the stress riser as the engine heats and cools a few cycles, and then leak coolant into the oil.
If you have access to a welder who knows aluminum, these do weld up fairly nicely, but that usually costs more than a new cover, now down to around $50-$60 from many sources....*EB


*Beats the he** outa me!....*LOL**...