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04 6i has Loud valve train noise at 2800 RPMS and timing issues with Video
So my Mazda6 spun a bearing. I replaced the block and assembled everything. The car ran great for 6 miles until I took the RPMs up to 3k+ and then the check engine light came on and the car died. CEL was for timing being too advanced. I tow it home and pop off the valve cover. Somehow the timing was a little off on the intake cam. I set it right, the car idles perfectly and runs...but everytime I rev it to 2800+ rpms, there is a loud buzzing in the top of the motor. I replaced the OCV and it made no difference. Also, I did get a retarded timing code. I am too scared to drive it down the road since I don't trust it now. It is hard to imagine the intake cam going bad for no reason...Any ideas?? I hope this sounds familiar to someone, because I hate to just throw parts at it.
I might be able to get a video of the noise later
Last edited by GringoEJS; 01-14-2013 at 05:04 AM.
Reason: Added video