Oil loss

[dunk 1]

The top piston ring on both cylinders is broken ! Is this liable to be it or does it or does it signify other problems -the barrels look ok so am wondering if I should get it checked over properly or just fit new rings and see -I do not have the tools needed to progress further and am getting near the limit of what I am doing - what do you think ? -duncan

[mantaray]

Mounting old cylinders with a sealer only instead of the lower gasket, can ruin the upper ring.
Carbon Deposits are little bit lower then and the rings touching the carbon.
Result could be the broken rings.

Or sometimes...bad luck

[dunk 1]

Rear piston has small nick approximate to where the spark plug would be so this may also suggest it has been fitted with no gasket at one stage -although it definitely has the right ones now. Rear cylinder has lots of carbon -whats the best way to get rid of it -alo if I am ordering new rings how do I know that it hasn't ad a re bore I the past?

[mantaray]

You need the right tools to measure the cylinder.
Are there any markings on the pistons?
My oversize pistons showing 62.4 on it

If the sparkplug touched the piston, what about the valves ?

[dunk 1]

It's only conjecture that spark plug made the mark - and perhaps i am looking for problems -the valves appear fine on the surface but I do not have a valve spring compressor or the tool to remove the gugeon pins so am working with the pistons in situ -where are the markings on the piston? As I do not have all the tools or know how I am trying to decide whether to buy new rings and gaskets and put it back together or to take it for a proper check up? Thanks for all input -Duncan

[EVguru]

To remove spring caps and collets;

Place the head valves down on a piece of wood. Stuff a bit of tube or a box spanner with rag, place on the top of the spring cap and give it a good hit with a hammer.

To remove gudgeon pins;

Clean ends of gudgeon pin bore. Warm piston with a hot air gun. Push out pin with fingers.