We took the heads off tonight, and there it was...the #6 cylinder had some water inside and it corroded. The rings were stuck to the wall. We cleaned it up, gave the piston a whack with a rubber mallot, and it came free.

Hey Nitro...you are right, we're tearing it down and starting from scratch and doing a full rebuild. Ill be visiting the machine shop this weekend....What can I expect to pay for a cleaning and bore/hone?

Thanks.