|
|
 We were surprised at the poor...  We were surprised at the poor condition of rod bearings, which were down to the copper.  Main bearing wear wasn't good...  Main bearing wear wasn't good either, with some evidence of oil starvation.  The No. 7 main journal shows...  The No. 7 main journal shows evidence of rust from sitting. Gary's crankshaft will have to be polished, but wear wasn't excessive enough to warrant grinding. This one still has the factory rear main rope seal.  Piston rings are seized in...  Piston rings are seized in the grooves, as expected. This is why firing an engine that has been sitting a long time normally results in oil smoke and a lot of noise.  Camshaft removal happens after...  Camshaft removal happens after crank removal because access improves.  This is our seven main bearing...  This is our seven main bearing block, which is ready for plug removal and deep cleaning prior to machine work. We're going to bore each cylinder .030-inch oversize. Our original plan was .020-inch oversize, however the cylinder walls were deeply pitted.  Parts were cleaned in a parts...  Parts were cleaned in a parts tumbler to like-new condition. JGM Performance prides itself on having one of the cleanest systems around, which means minimal offense to the environment.  National Parts Depot sent...  National Parts Depot sent us a complete AMK engine assembly fastener kit (No. 6000-1K). This is how you dress an engine up without wasting time having to clean hardware.  The 200 six's original iron...  The 200 six's original iron head was cleaned up in a special JGM process that makes iron and aluminum castings look new. Jim has installed bronze guides so the head is ready for valve seat machining. Bronze guides offer improved oil control.  In the 1960s, exhaust valve...  In the 1960s, exhaust valve faces and seats were lubricated with tetraethyl lead in gasoline. Beginning in the early 1970s, oil companies began removing lead from automotive fuels to help lower air pollution levels. Automakers began using hardened exhaust valve seats as a response. When rebuilding a vintage Mustang engine, cylinder heads need hardened exhaust valve seats and new valves. Here, JGM cuts the original iron exhaust valve seat in preparation for the steel insert.  Here, the hardened exhaust...  Here, the hardened exhaust valve seat has been pressed into place with a process known as interference fit (or pinch fit).  JGM cuts a standard three-angle...  JGM cuts a standard three-angle exhaust valve seat. Most important here is valve cooling, with as much valve to seat contact as possible.
|