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Re: Head differences
There was never a head tick issue. Originally it was though to be a lifter tick and they had came up with the head fix by replacing the head however the actual noise is a result of collapse piston skirts on the piston its self. Due to excessive piston to wall clearance. The cylinder is actual cone shaped and the largest being at the top when the piston comes to the top of the cylinder the piston starts to rock back and forth when the cylinder fires rattling all the way down the cylinder.
Also the aviator head is different from the 03-04 head just for the record. And the fact that they were the only coolant improved head was a miss conception as well. As was the rumor of no production heads came with 9 thread
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Dan
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