-
Hi Guest!
If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
General Tech Hastings Oil Ring
- Thread starter KVH
- Start date
Share this page
Offline
A google search for "hastings oil ring tr4a" got a thread about this. I have no experience with this type ring.
Bob
Bob
Brinkerhoff
Jedi Knight
Offline
I've used this type before. This part is held in place with two narrow rings yes?
Offline
TR3driver
Great Pumpkin - R.I.P
Offline
There are lots of styles of oil rings, not even all rings from the same maker are the same.
I believe in this case, there is an outer ring that is one piece, with holes for the oil to pass through. The ring shown goes inside the outer ring and does not contact the cylinder at all.
IMO, rather than looking at ring design, you should be checking that it fits the piston groove with the right clearance, as well as the cylinder bore. If all measurements are correct, it's the "right" ring. Not necessarily the best, but we had a long discussion about problems with the 3 piece design and they may have switched to supplying this older (I believe) design because of those problems.
I believe in this case, there is an outer ring that is one piece, with holes for the oil to pass through. The ring shown goes inside the outer ring and does not contact the cylinder at all.
IMO, rather than looking at ring design, you should be checking that it fits the piston groove with the right clearance, as well as the cylinder bore. If all measurements are correct, it's the "right" ring. Not necessarily the best, but we had a long discussion about problems with the 3 piece design and they may have switched to supplying this older (I believe) design because of those problems.
Offline
Now that you mention it I remember these from many years ago although I never used them myself. They go behind the cast oil ring. Here is similar from a Hemmings article:
https://assets.hemmings.com/story_image/54005-500-0.jpg?rev=2
I'd go with a modern one or three piece ring.
Tom
https://assets.hemmings.com/story_image/54005-500-0.jpg?rev=2
I'd go with a modern one or three piece ring.
Tom
Brinkerhoff
Jedi Knight
Offline
Tom , ok yes there is a large ring that fits over this inner expander. Just check the gap in the outer ring and you should be ok. You need to use a piston ring expanding tool or risk breakage.
TR3driver
Great Pumpkin - R.I.P
Offline
The piece shown is very thin and springy. It becomes almost flat when installed. Should fit the standard size ring groove.
I just got a set of 85 mm Standard rings, I'll have to check what the oil rings look like. Pistons look a lot like the earliest TR pistons in the book, with the 4th ring below the pin and a bunch of slots in the skirt, but the compression ring grooves are smaller I think.
Speaking of which, what is everyone using to replace photo bucket? I'll have to deal with that at some point.
Anyone set up a Raspberry Pi as a photo server to the web?
I just got a set of 85 mm Standard rings, I'll have to check what the oil rings look like. Pistons look a lot like the earliest TR pistons in the book, with the 4th ring below the pin and a bunch of slots in the skirt, but the compression ring grooves are smaller I think.
Speaking of which, what is everyone using to replace photo bucket? I'll have to deal with that at some point.
Anyone set up a Raspberry Pi as a photo server to the web?
Offline
Admittedly a Luddite but I just keep the photos on the hard drive or usb flash. I have a Photobucket account but some time ago, and for reasons unknown to me, multiple copies of my photos wound up on Photobucket. There were too many to delete without losing something I valued so I quit using it.
Tom
TR3driver
Great Pumpkin - R.I.P
Offline
Perhaps I was unclear, Tom. What I do with PB is to post photos there and then cross-link them into the various Triumph forums so that they show up in my posts but aren't (in this case) taking up space on Basil's server. The problem being that he limits the total size stored and I am far beyond that limit.
I definitely keep multiple copies on various local devices; but they are not accessible from the Internet. So I can't use them directly to put pretty pictures in my posts. For example, this image is on PB rather on BCF
(Well, it would be, if PB hadn't quit working)
I definitely keep multiple copies on various local devices; but they are not accessible from the Internet. So I can't use them directly to put pretty pictures in my posts. For example, this image is on PB rather on BCF
(Well, it would be, if PB hadn't quit working)
Last edited:
I use one piece cast iron rings on my old motorcycles but have never seen one with an expander.
As far as proper fit to the piston I would suggest one more check that most manuals don't mention,but after getting burnt with repro pistons I always check end gap closed.
With piston ring gap set in cylinder ,after ring is on piston compress the ring to close the gap.If you cant get the ends to touch you have a problem.
tom
As far as proper fit to the piston I would suggest one more check that most manuals don't mention,but after getting burnt with repro pistons I always check end gap closed.
With piston ring gap set in cylinder ,after ring is on piston compress the ring to close the gap.If you cant get the ends to touch you have a problem.
tom