Re: 1936 Packard 120B Business Coupe engine rebuild

Posted by Owen_Dyneto On 2012/12/26 23:24:11

but I really want to do it in the car, we are on an Island and it would be difficult to get it bored and honed

Just for starters, you have to remove the engine from the car and strip the block to have it bored. If the cylinder taper was perhaps 0.007" or less, you could hone and use new rings on existing or new pistons which have been knurled or had expanders fitted. One critical thing in that operation is keeping the honing grit contained. Though that kind of job can't be called a rebuild, it was reasonably common in the day and might give you another 20,000 or so miles, everything else being up to snuff. You might consider starting by stripping the engine and making measurements of bore size and taper, crankpin "roundness" and size, etc.