O-ring specs?
- Thread starter kleann
- Start date
Drothgeb
Almost Fast-N-Loud
- Joined
- Sep 18, 2010
- Messages
- 820
First, let me say that I'm far from being a Cummins expert on this kind of thing. And, I decided to try this just based on some other guys BSing at the machine shop. Never heard of anybody else doing this on a Cummins, but I'm sure that I'm not the first. Anyway, consider this a warning, just in case you try it, and it doesn't work out.
My intent was to keep the inner ring as close to the normally installed position but still keep a rings width between the inner and outer. The normal position put the outer ring just on the egde of the gaskets fire ring (the upper folded ring, not the lower outer edge), So I moved it in slightly so that the outer ring would still compress the edge of the fire ring. That put the outer ring at about 113.5mm. For the inner ring 110mm is about normal, but the space between them was getting too small, so I had it cut at 109.7. For the protrusion, I went with .010.
Like I said, it took a while to seat them in, 5 re-torques over a week and a half. And I didn't even start it until the nuts stopped moving. And this was with the HD tool steel studs @ 140lbs. Even after this, I'll take it easy and check the torque after about a week before I hit the track.
Doing another ring on the block may work even better, or it may cut the gasket in half, or it may be too hard to compress and cause water or oil leaks from their passages. I'm just not sure???
My intent was to keep the inner ring as close to the normally installed position but still keep a rings width between the inner and outer. The normal position put the outer ring just on the egde of the gaskets fire ring (the upper folded ring, not the lower outer edge), So I moved it in slightly so that the outer ring would still compress the edge of the fire ring. That put the outer ring at about 113.5mm. For the inner ring 110mm is about normal, but the space between them was getting too small, so I had it cut at 109.7. For the protrusion, I went with .010.
Like I said, it took a while to seat them in, 5 re-torques over a week and a half. And I didn't even start it until the nuts stopped moving. And this was with the HD tool steel studs @ 140lbs. Even after this, I'll take it easy and check the torque after about a week before I hit the track.
Doing another ring on the block may work even better, or it may cut the gasket in half, or it may be too hard to compress and cause water or oil leaks from their passages. I'm just not sure???
Last edited: