Just another build thread

[shorestiva]

A little expensive but if there's nothing good available aftermarket I can justify spending that much. I've ordered a few things from the local mazda dealer through work (wholesale pricing) and they've been cheaper than those online prices.

[Festiver]

A little expensive but if there's nothing good available aftermarket I can justify spending that much. I've ordered a few things from the local mazda dealer through work (wholesale pricing) and they've been cheaper than those online prices.

True you'll never need new rings again

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[dliverance]

Well thats interesting. I don't remember which ones i ordered but I'll be carefully inspecting them before I install them. Thanks for the heads up.

[dliverance]

I should have a very picture heavy update coming this weekend. I will be assembling the bottom end since all of the parts came in. Friday I will be ordering the head gasket and sending the vc off for powdercoat so I'm guessing I'll have the entire motor assembled in just a few weeks here.

[dliverance]

Here's part 1 of the bottom end assembly. I borrowed a sweet hone from work to clean up the cylinder walls. The cross hatching isn't a 45 but it'll do. I also cleaned up the internal parts in a super cleaner bath, seafoam bath and then a wd40 clean followed by cleaning with compressed air. I'm taking a small break to get some food and then I'll be putting everything back together. I am going to be reusing the old rings. They're in pretty good shape.

[dliverance]

[FestYboy]

What grit stone on the bore hone?

[dliverance]

I'd have to look at the package. I'm already in bed now. I got about halfway thru the assembly and realized I put the main bearings in wrong and had to take it back down. Here's the rest of the pics.






And here's me putting the bearings in wrong the first time

[Advancedynamix]

What was your ring gap? That's critical on these engines. Most aftermarket rings come out around .012", but I've taken apart 150k mile turbo engines with a .007" top ring end gap. Twice the gap on fresh rings is a big problem.

[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:

[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]

An interesting bit on honing.....

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

[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.

[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 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.