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dunny_mark
07-30-2006, 02:38 PM
As I was barreling *** down a straight today I heard a loud ticking noise coming from the valve train- took the valve cover off to find my cam bearings blew apart and where laying in the top of the head.

Does anyone know why these bearings came apart like they did- I know for a fact that they were getting oil? Cam and bearing were about 3 months old.

Has this happened to any one else? Any suggestions!

87 250x with a duncan billet cam

DAVE14
07-30-2006, 08:43 PM
mines an 02 & had it apart many times ,never had a problem were the dowels in place that lock in the cam bearings?