Rover V8 piston rings
Moderator: phpBB2 - Administrators
Rover V8 piston rings
Ive picked up a Rover 3.9 in bits all clean & ready to go, but the top two rings, can any one confirm the correct position ..
Rings are AE, one ring is square section with the AE logo on on one side.
The other ring has a 45 degree chamfer on the inside face/edge, it has "AE TOP" on the opposite side.
Easy to think that top should be the top groove, but I have an idea its second grove with the word "TOP"face up towards the crown, that would leave the chamfer facing down.
please if any one can confirm, thanks
Rings are AE, one ring is square section with the AE logo on on one side.
The other ring has a 45 degree chamfer on the inside face/edge, it has "AE TOP" on the opposite side.
Easy to think that top should be the top groove, but I have an idea its second grove with the word "TOP"face up towards the crown, that would leave the chamfer facing down.
please if any one can confirm, thanks
-
- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
Re: Rover V8 piston rings
A picture of each would help.
But the chamfered ring is most likely the 2nd ring, scraping downwards.
But the chamfered ring is most likely the 2nd ring, scraping downwards.
Re: Rover V8 piston rings
The other other ring is the same other than its square in section
Re: Rover V8 piston rings
The chamfer must go up according to the attached chart. This helps force the ring against the cylinder wall during the combustion stroke. But the markings on your rings are confusing so further comments from experts needed I would suggest.
-
- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
Re: Rover V8 piston rings
This would be typical of a top ring, upwards as photographed. Although I see the chart above also says it could be a second.
Although pics and descriptions maybe unclear ?
Are those 3 different rings, or just 2 types ?
The one that says top....is also the one with the chamfer ? Or not ?
The first image, what is the face of that ring like and the rest of the profile. The photo doesnt show
-
- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
Re: Rover V8 piston rings
Both inner and outer profile matter
http://slideplayer.com/slide/4395487/14 ... +Types.jpg
https://www.hotrod.com/articles/hrdp-09 ... ring-tech/
And top could be top ring...or top of ring. Although often top of ring marking is just a little dot.
http://slideplayer.com/slide/4395487/14 ... +Types.jpg
https://www.hotrod.com/articles/hrdp-09 ... ring-tech/
And top could be top ring...or top of ring. Although often top of ring marking is just a little dot.
Re: Rover V8 piston rings
I've just looked at a set of AE rings (3.9 Rover) and the top ring is a plain ring with AE marked on 1 side and the second ring is chamfered with TOP AE marked on the side opposite to the chamfer suggesting that the chamfer goes downwards. The absence of the word TOP on the top ring suggests that either way up is ok. It seems that modern thinking is putting the chamfer downwards for the second ring. I have some rings from Real Steel for which the instructions are clear that the second ring chamfer goes upwards but I've had these rings for over 10 years.
Re: Rover V8 piston rings
Thanks for all the help, the pics show the same ring, the one with the bevel/chamfer....devonman, yes its second ring bevel downwards..cheers all!
-
- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
Re: Rover V8 piston rings
Again....you must consider the face profile too, not just how the back of the ring appears.
On the ring that doesnt say top, are there any markings at all on it ?
On the ring that doesnt say top, are there any markings at all on it ?