15 replies to this topic

[jonas82]

Hello everyone, maybe somebody ever had changed piston rings with engine in it. Any chance doing it, i had flushed engine several times, but still where is oil on cylinder number 4, I had changed valve stem seals, did everything apart rings, Thanks in advance

[siruncle]

its a sump off job, and iirc crank out. sounds easy but the subframe is probably in the way too. Its probably less grief to remove the engine out the top, then operate as it isn't fun operating overhead under the car.

while its out, its a good opportunity to check or deal with the inlet manifold flaps, as you can get at the bolts

[jonas82]

siruncle, on 20 February 2012 - 07:25 PM, said:

its a sump off job, and iirc crank out. sounds easy but the subframe is probably in the way too. Its probably less grief to remove the engine out the top, then operate as it isn't fun operating overhead under the car.

while its out, its a good opportunity to check or deal with the inlet manifold flaps, as you can get at the bolts

I had taken out flaps, was worn a bit, but why only cylinder 4 is floating with oil not all 4, could it be some valve worn?

[siruncle]

maybe oil control ring is damaged.

[jonas82]

siruncle, on 20 February 2012 - 08:04 PM, said:

maybe oil control ring is damaged.

Maybe I should do compression test first, maybe you know, should id be aruond?

[PURPLE_2L_LX]

Compression test wont show a sticky or worn oil control ring. Lets you know if compression is down but oil rings
wont really affect that.

You will only really tell after stripping it. See if the rings are still springy or gummed up.

[jonas82]

PURPLE_2L_LX, on 23 February 2012 - 02:08 AM, said:

Compression test wont show a sticky or worn oil control ring. Lets you know if compression is down but oil rings
wont really affect that.

You will only really tell after stripping it. See if the rings are still springy or gummed up.

I'm just after changing piston rings, they where worn and stuck, light was triping this evening so I was working with head torch only ))) But I changed them all in the dark, maybe you know what is the torque of piston bolts?

[jonas82]

Does somebody knows, what torque is pistons tightened to? I have replaced all rings, now I just need to tighteen them

[siruncle]

as in the conrod bolts?

[jonas82]

siruncle, on 24 February 2012 - 09:00 PM, said:

as in the conrod bolts?

yes, and what torque head bolts?

[PURPLE_2L_LX]

Did you position and gap and position the rings properly??

Seen a few that have been fitted poorly and they wonder why it burns as much oil after replacement.

Were the old rings worn or gummed up?


Head Bolts:

Stage 1...5Nm 4lfb ft
Stage 2.....15Nm 11lbf ft
Stage 3.........45Nm 33lbf ft
Stage 4.............Angle tighten 90 degrees
Stage 5..................Angle tighten 90 degrees

[jonas82]

PURPLE_2L_LX, on 25 February 2012 - 01:27 AM, said:

Did you position and gap and position the rings properly??

Seen a few that have been fitted poorly and they wonder why it burns as much oil after replacement.

Were the old rings worn or gummed up?


Head Bolts:

Stage 1...5Nm 4lfb ft
Stage 2.....15Nm 11lbf ft
Stage 3.........45Nm 33lbf ft
Stage 4.............Angle tighten 90 degrees
Stage 5..................Angle tighten 90 degrees

Thanks, oil rings where stuck inside piston, top 1s a bit worn

[jonas82]

I hope I did everything right

[kelvinterry]

jonas82, on 25 February 2012 - 09:31 AM, said:

I hope I did everything right

You really need to fit new head bolts and the same with the con-rods saves a engine if they break that why they are called stretch bolts

[PURPLE_2L_LX]

Did you step the gap/split in the rings?

[jonas82]

PURPLE_2L_LX, on 25 February 2012 - 11:09 PM, said:

Did you step the gap/split in the rings?

yes I did