So earlier this week a USB borescope or endoscope I had ordered finally arrived so once the weather cleared up a little bit I used it to look down in the cylinder bores of my “new-to-me” barn find (sort of) 1962 MKII. What I found was not encouraging.

Take a look at the resulting video:

After looking at the videos from the endoscope I am not sure it is worth wasting a few pints of marvel mystery oil in this motor.

If there are any questions or suggestions please put comments down below the video.

 

I agree bores look very rusty but even worse pitted. Not sure what is going on with the piston tops they look as though they are 7:1 ratio pistons by the crown shape but the tops are all furred as the Alloy has seen better days.

 

It needs new pistons and a rebore, assuming the block isn't cracked, then it's junk for sure.

Take the head off, and use something to dissolve the rust so at least it can be taken apart.
Something like Navel Jelly, to break the bond between the rings and bores.

rust disolver - Google Search

I would not use Muriatic Acid though as the video suggests.

The bores are rusty because moisture entered into the combustion chamber through the carbs and exhaust.

 

+1^ Jeff ~ I'll bet a couple of stuck valves amongst that mess. Get the head off!!!

 

You may as well throw heaps of anti-rust oils/solutions at the system to loosen it up anyway as the engine will have to come apart.
With that amount of already established corrosion in the bores and pistons I would be checking the head for corrosion and especially the valves for rust on the valve stems and faces.

 

as far as the bores are concerned....i've seen blocks fresh back from the machine shop that have rusted up (assuming they haven't been protected from the air) like that within days or even hours. of course, that doesn't really bear on the question of whether or not the engine is junk or not.

anyway, i don't see the point in investing any time in getting it running in its current stat, except, perhaps, to titillate youtube subscribers.