Post by
float_6969 »
https://forums.nicoclub.com/float-6969-u780.html
Mon May 14, 2012 5:28 am
No dice. Sounds like a bad camshaft. The splines in the center of the exhaust cam have a nasty habit of coming loose and rotating inside the camshaft. No real way to fix it except buy another cam. Are you running the stock, un-modified upper timing cover and have all of the bolts installed? Usually when I've heard of it happening in the past, it's due to a modified, or improperly installed upper timing cover.