Any tips on un sticking piston rings

dewismotorsport

Fitted engine to coupe today (Z22SE) and turned it over and it has zero compression on all 4 cylinders :cry:

Unknown when it was last run but a good while, been stored in a cold and damp garage.

Chain is intact and cams spin and valves open and close, it sparks and fuels.

Have tried putting a cap full of oil down each cyclinder and still no joy, also tried briefly firing 24v through the starter motor to get it to spin faster in the hope the cranking may produce enough heat to free them up.

Have now put some redex treatment into each plug hole and will leave over the weekend to eat away at the carbon.

Only other ways of freeing them would be to get the car towed and have it in second gear with clutch up to possibly free them up :dunno:

Another option I thought of was to make a adapter for my heat gun to blow some hot air down into the pistons to warm and expand the alloy pistons to hopefully free the rings that way :dunno:

Anymore suggestions other than strip the engine down?

astra22bertoneauto

Either your compression tester is FUBAR, timing is way out and/or you have lots of bent valves.

EDIT: On another thought, in theory you could try an small amount of diesel down the spark plug hole(s) and leave over night. As you prob know diesel cleans stubborn oil from parts. Downside you would have to do an oil change afterwards as you'd have the same effect as engine flush.

dewismotorsport

I have put a treatment down the plug holes and see if that improves but tbh it may well be just empty hydraulic lifters, so will have to give it a tow and see if it improves

vocky

you have lots of bent valves

that would be the first thing to check (n)