Buddy Don loaned me his ridge reaming tool. I took off just enough to get the pistons out of the bore.
The pistons all appear to be fine. Some pins are looser than others – some floppy and some downright stiff. I’ll have to check that out.
The harmonic damper was very tight on the crank.
The timing gear and chain looked fine. I may keep it as it is a low mileage engine. I have a dual sprocket unit for the engine that will be coming out of the L48. This is a failed engine so I’ll be looking for any causes.
Mains out. Nice to have a 4 bot main block. All bolts packages and labelled. Centre caps are all marked to go back in as they were removed.
Crank and cam out. Can’t really get a shot of the cam bearings, but there is noticeable wear. I”ll be buying a set of cam bearings and also the tool to extract and install them.
The crank is in poor shape. Three rod journals and the three centre mains are all damaged enough to require a grind job – likely just .010 under I hope.
Looking at the crank, rod and cam bearings leads me to think that the engine was run on low levels of oil and maybe even next to no pressure. If the truck had an analog gauge the problem might not have been noticed soon enough. That and maybe no oil changes – just topping up – may have caused the excessive wear.
Next: more checking