Thread: 2.6 engine help/oversize Pistons

How did you assemble the oil ring? Wavey ring should be first as its the expander, then crimped ring, oil control. Then top and bottom split rings hold the lot together. The top and bottom split rings fit into the crimped ring and as such dont actually touch the inside if the piston groove but do touch the top and bottom, respectivly, of the piston groove. Did you check piston to bore clearance first? Did you then check compression ring gap in the bores? If all good then you can also check the split oil rings fit ok in the bore if u want too. The oil ring "assembly" should fit ok as it will comperss. Is the oil ring fitting in the piston groove ok? Check also comperssion ring fit in grooves. If the oil ring is too sloppy in the piston groove u have a problem.

I see ur using old pistons. Make sure the grooves are cleaned of carbon deposits as well.
Cheers

assemble the rings off the piston and use the piston inverted to push the rings down the bore, check the gap with a feeler every half inch or so.

this is the only time you line up the gaps on the oil rings.

G'day All,
Interesting thread.
Can I suggest you contact the ring manufacturer Brico Engineering UK. (link: Brico Engineering Ltd. | Coventry | England | ENGINEER SCOUT) and see if anyone can remember the correct way to assemble the ring set in particular the oil control ring assembly. They may have documentation they can send you.
Chris

Originally Posted by morty

G'day. This morning was looking at installing the new compression and oil rings and I have run into a problem. The .030 oversize oil ring set which I have bought come in 4 pieces.
Attachment 153484Attachment 153485

The Old ones were a set of 3 components.

Attachment 153486
I checked the clearance of the 2 small flat oil rings and they were correct .015 to .033 thou. However when I install the crimped ring, the wavy ring and the 2 flat oil rings it just seems way to big and won't fit into the bore. The inner crimped ring seems like it is far too big. Will the crimped ring compress enough to fit into the bore? The gaps on the 2 flat oil rings are huge!

Attachment 153487Attachment 153488Attachment 153489

The part numbers are correct. So with a compression ring installation tool will these compress enough and fit into the bore? I hope the photos make things a little clearer.

Thanks for any help,

Hamish.

I think you will find the crimped ring is fitted 1st then the two oil rings with the wavy ring between the two oil rings to keep them seperated as per the photo of the piston.

You need to push the ring down in to the bore with the skirt end on the piston, as the top of the piston top is not flat?

Originally Posted by Blknight.aus

assemble the rings off the piston and use the piston inverted to push the rings down the bore, check the gap with a feeler every half inch or so.

this is the only time you line up the gaps on the oil rings.

G'day All,

Now it's starting to get interesting. Learning never stops when you have a LandRover!

This is the link to Mahle oil control ring installation: YouTube
The crimped ring is a Radial Spring as shown in the video.

However, where the wavy ring (spacer) goes is of concern. Hopefully the manufacturer can advise the correct install placements.

Chris

Originally Posted by cjc_td5

You need to push the ring down in to the bore with the skirt end on the piston, as the top of the piston top is not flat?

you are correct, I frequently forget that when dealing with slant head setups...

most times its the skirt end thats got the wavy cutout.

Cheers for all the help. I ended up taking a piston and the rings to a aircraft engine rebuilder who had rebuilt some of these engines years ago. It ended up being the right way. The ring compressor did squeeze them in enough to get them into the bores. Got all the pistons in.

fullsizeoutput_4bb.jpg

Ended up getting the cam in as well. Bloody hell it was a bit tricky to get all those half moon soft metal bearings located in the right spot. Had to use some cable ties to hold them together while getting the cam in.

IMG_3104.jpgfullsizeoutput_4bc.jpg

Dropped off the flywheel to get in machined and trying to find out some part numbers for the 2.6l clutch plate kit. I believe is the RVK-6003 for the exerdy clutch kit. The old clutch is a 9.5 inch plate. However it doesn't have the 1/4 spacer under the slave cylinder which I have seen mentioned as an indictor to need the 9.6 clutch plate. May have been left behind somewhere year ago.