cracked piston ring?

[jimthelandyman]

just found out from the garage that i have low compression in cylinder 1, the plugs had been taken out and there was oil in there. This has also caused oil to be dumped into the air filter, the airbox is very full of oil, do i have a cracked piston ring or is it something else?

[rollazuki]

could be cracked piston or piston ring, could just be oil control ring gummed up and stuck in the piston, or the oil drain holes behind the control ring gummed up and blocked.

[jimthelandyman]

Does anyone know how long this job would take for a garage to do, to take the top end off and replace the broken parts? ive been running around in the 90 for about a month but i have not heard any tappety noises that could be a sign of a cracked piston or ring.

[hobbit]

Not too sure on the defender, but its poss to pull the head and sump off to do the work on the series.

Did they pop some oil in the cylinder and retest to confirm an upper or lower loss of compression?

[jimthelandyman]

not sure what they did but they said there was oil in there already, must be a ring. Its been burning loads of oil and it has sucked oil into the air filter through the engine breather i think.

[jimthelandyman]

It has come to my attention that the oil in the air filter is probably a blocked breather, and someone has told me that i have more than likely got a cracked piston ring causing the low compression and the oil in the cylinder. Anyone know roughly how much it would be to have a ring replaced?

[Miniman]

Nobody can tell you how much or how long. Its one of thoses job you hate doing as its head off and sump. So that means new gaskets head gasket. Also if you going to get one done why not replace all of them whilst you got it in bits. You never know in another month you may have another ring to replace. Big end shells aswell. Its going to cost but at least you have piece of mind when its done. New head bolts. You better doing it right oh and not forgetting little ends. Is it a Turbo diesel or N/A ?

[jimthelandyman]

Its a turbo diesel, will be getting the garage to do the job, me and my old man can't be bothered doing it on the drive. Just don't understand why the piston ring has gone because the engine was rebuilt just under 20K miles ago, anyway like you said i will have a piece of mind when its done.