I had a bit of a look at the Jowett Javelin problem today. Started out with a compression test, all cylinders fine and no noise when the engine is turning over on the starter. Fired it up and there was a severe knocking sound so shut it off quick, drained the oil and removed the sump & splash plate so I could see the crankshaft & rods. The photo shows what I discovered, the big-end bearing cap of the right front cylinder was loose. It might just have been caught in time, the crankshaft and rod look ok but the bearing shell has been knocked about somewhat. Now the tricky bit, finding a set of bearings in the right size.
