un-sticking stuck piston rings

[TylerDurden]

My bet is the turbo or its associated parts like the drain line has a hole. I wouldn't run anything in the diesel or the oil until you do a leak down and compression tests to see if it is the rings/valves.

I'd pull the elbow between the turbo and intake to check for leaking turbo seals, plus do the compression/leakdown tests.

[Toby]

Unless you get really lucky and find a bad turbo seal you will need to pull the head, jerk the pan, and change the rings. It should only take you about 8 hours.

[TylerDurden]

Bad turbo seals can blow a bit of oil... I'm putting 1qt/350mi into one of my Jettas.

[dave friday]

Just did a compression check;320,340,320,320 !!but i am at 2500ft.
what i dont get is, no blue smoke!

[TylerDurden]

what i dont get is, no blue smoke!

It gets burned like the fuel.

[dave friday]

ive only checked the top ring..1.65mm gap at 1.25inches from the top of the bore.
Can i use non stretch big end bolts?.

[8v-of-fury]

what i dont get is, no blue smoke!

It gets burned like the fuel.

Yup. it only smokes blue on an engine with a throttle plate or restricted intake tract.

[dave friday]

Before i replaced the turbo [may 2012] it would lay a big blue cloud on full throttle.

[wolf_walker]

I, admittedly foolishly, swapped a really high mile TD to synthetic years ago and it would most assuredly smoke blue at idle and under hard acceleration. Wasn't there the week before on dino and was gone a week after back on dino. It was wore the heck out. :-)

Sent from my SCH-I535 using Tapatalk 2

[dave friday]

ok a bit more;second compression ring .45mm so in spec,oil control ring 1.50mm so well worn out [like the top ring ].
Looks like i got sold a mixed of rings !!.
So tomorrow we look for rings!.

[theman53]

who did the turbo? I stated earlier that I thought it could be somewhere in the turbo parts.

[dave friday]

Turbo was a re-con done by a UK company,no play in the shaft and no oil in the compressor,so you dont think the worn rings are the cause of the very low compression?

[theman53]

Possible, but I had one that had 240 -260 in the holes and it didn't use oil it just started hard.

[dave friday]

Thanks,well it starts instantly [like a direct injection engine] just runs a little rough if i dont have the cold start pulled out.
I plan on replacing the crank oil seal [flywheel end].
Thanks for all the advice.

[dave friday]

Well I did find one stuck ring the second compression ring on cylinder number four!
Im waiting for stretch big end bolts ....