My friend said he needed a new front main seal but that wasn't the problem, the problem was his dowel pin came out and cracked his timing case cover and i just read 2 threads with the same problem, I have a 12 valve to and I was wondering if there was anyway to prevent this problem?

 

yeah, weld it

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there are actually kits that are sold to fix it but just tack it in

 

yes you have take the front timing cover off and tab the dowel pin thats the only way to prevent it and that should be a top priority because they will come out eventualy