Amelia Squariel: W/NG – An sudden occasion

A number of weeks in the past I used to be cracking on dwelling on the W/NG, doing 55-60 up the North Walsham by-pass (the previous Midland & Nice Northern alignment to Honing) when she abruptly reduce out. After ending the ignition checks I kicked it over to search out apparently no compression. I popped the exhaust valve cap off for a glance, discovered nothing and some minutes later she began OK and carried me dwelling apparently advantageous.

Caught valve maybe? She was fairly scorching…

At dwelling, I put the endoscope down the bore for a glance and it was clear there had been a partial seizure sooner or later. Eager about it, there had been a squeak from the rear tyre and somewhat shimmy on the again finish, and I might had the clutch in in a short time.

Pulling the top off you  may see the scuff within the bore very clearly:

The rings had been OK, aside from the truth that the second ring was tight in it is groove. Hardly shocking actually:

Rightly or wrongly, I polished this out. Probably somebody will inform me I ought to have changed the piston.

I constructed this software to carry the barrel whereas I honed it – it is simply a few bits of plywood:

You’ll be able to mount it within the vice both manner, however that is probably the most handy for honing. I mounted it vertically to grind the cylinder head to barrel joint.

I used a cylinder hone to wash up the bore. Hopefully these honing marks will retain a bit extra oil…

I additionally changed the inlet valve which was very free – the brand new one had an interference match within the bore however was the older bore measurement – the inlet valve stem diameter modified from 5 1/16″ to three/8″ someplace round 1941 I believe…