Just another build thread

[dliverance]

aren't you glad you checked? No you should have peace of mind!:happy3:

Oh yeah. I'm still taking down the block and I'm going to lightly hone with a ball hone to clear up the cross hatching

[Rick the Quick]

I checked the ring end gap with one of the aftermarket rings that I'm not using. I used the same one to check all 4 cylinders and got .014, .014, .015 and .014. I'm going to check with an oem ring sometime later this week. If the oem rings are good, I'm not going to tear it all apart.

aren't you glad you checked? No you should have peace of mind!:happy3:

[Advancedynamix]

I'm going to ordering a set of factory rings soon should I get the oversized and file down or will standard size be fine?

I would think that, as long as your bore is within spec, standard size should be fine.

[shorestiva]

I'm going to ordering a set of factory rings soon should I get the oversized and file down or will standard size be fine?

[Festiver]

I checked the ring end gap with one of the aftermarket rings that I'm not using. I used the same one to check all 4 cylinders and got .014, .014, .015 and .014. I'm going to check with an oem ring sometime later this week. If the oem rings are good, I'm not going to tear it all apart.

Yeah that's spot on with what Charlie said his were too seems like a aftermarket stereo type

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[Advancedynamix]

Real quick Google search shows that some spec miata guys were buying rings for .010 over then filing them down. I think it makes the rings have more tension on them though. I'm sure charlie will chime in and tell us why this is a bad idea lol.

This seems to work well, except the ring quality isn't good on aftermarket rings, so that causes problems.
The OE rings have noticeably more tension than the few sets of aftermarket rings I've purchased (NPR, Hastings).

[Advancedynamix]

I guess I'll be tearing it apart this weekend and checking the ring gap on the stock and new rings that I didn't use. I'll check it at 4 different depths of each bore and I might even clean up my other block and grab another hone. Sucks because I have to order another set of bearings but I'd rather be certain.

You don't need to replace the bearings unless you've scratched them. Pedro still has the original Main bearings because they were well within spec. No need to toss good parts.

[FestYboy]

I would suspect that it would put an odd twist to the ring, the inside diameter edge being pushed above or below the OD edge plane within the bore and causing excessive tention within the ring land.

[shorestiva]

Real quick Google search shows that some spec miata guys were buying rings for .010 over then filing them down. I think it makes the rings have more tension on them though. I'm sure charlie will chime in and tell us why this is a bad idea lol.

[dliverance]

I checked the ring end gap with one of the aftermarket rings that I'm not using. I used the same one to check all 4 cylinders and got .014, .014, .015 and .014. I'm going to check with an oem ring sometime later this week. If the oem rings are good, I'm not going to tear it all apart.

[dliverance]

Actually, I've got an idea. Before I tear the block apart, I'll drop each piston down and check the ring end gap of the aftermarket rings. If, they're within spec then I think it'll be safe to assume the stock ones are good.

[dliverance]

I guess I'll be tearing it apart this weekend and checking the ring gap on the stock and new rings that I didn't use. I'll check it at 4 different depths of each bore and I might even clean up my other block and grab another hone. Sucks because I have to order another set of bearings but I'd rather be certain.

[Rick the Quick]

An interesting bit on honing.....

https://www.hastingspistonrings.com/tech-tips-faqs/cylinder-bore-refinishing

[dliverance]

I retained the stock rings. I didn't check ring gap and its all assembled now.

I think you guys think i opened the bore up a lot more than i did. The only thing i did was polish the cylinder walls.

[Rick the Quick]

AND....did you know or think about the fact that every .001" you increase the bore diameter you increased the ring end gap .003? I use honing only to finish a freshly bored cylinder to the correct size. And no I'm not the smartest guy on here, just one that has made a lot of mistakes in my early days. Now in my later days, fewer mistakes. Not to mention that I am more resourceful in fixing them.....LOL!:woc: