My grandad told me that earlier this week he was delivering a load of sand to a job site in the '51 2R16 Dump Truck I won in the raffle and traded him for the Scotsman PU. He said that suddenly the engine started to rattle (245 Big 6) and then started to knock. It's either a rod or the timing gear may be stripped. (That happened to the Scotsman PU. We thought it was a rod, but we replaced the timing gear and the little motor's never ran so good) My grandad's gonna pull the pan and see what the problem is. Hopefully we'll get lucky and it won't be anything too serious. But, if it is, he has another big 6 destined for the fire truck, but it's a long ways down the list of projects.
Matthew