Are these rods reusable?
#1
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As the title says, getting everyone's opinion on if I could use these rods or not. Engine was dirty, clogged the oil passages, no wrist pin wire in piston #4 either. Bearings looked pretty damn bad for 3000 miles.
Anyways, the damage:
they all look pretty much like this, less scouring on the end-cap side though.
![Name: IMG_3176.jpg
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Crower I-beam rods, it'd be nice if I could reuse them but I don't want to pull another engine hah.
And the rest of the damage:
#1
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#2
![Name: IMG_3177.jpg
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#3
![Name: IMG_3179.jpg
Views: 237
Size: 31.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/203870d1501248814-these-rods-reusable-img_3179.jpg)
#4
![Name: IMG_3182.jpg
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Size: 45.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/203871d1501248814-these-rods-reusable-img_3182.jpg)
was cause by:
![Name: IMG_3163.jpg
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head looked bad, looks like mix of coolant and oil. weird thing was that the drained oil looked fine, go figure:
![Name: IMG_3144.jpg
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Size: 67.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/203873d1501248814-these-rods-reusable-img_3144.jpg)
Time to build another engine, I think I'm going to try to get as much work done it while its in the hands of a professional during assembly, everything reworked, acid bathed, oversized pistons, acl bearings, knife-edge crank, anything else I can think of between now and then hah. Wish me luck!
Any feedback is welcome just reaching out for advice and yes this was the short block that rogezeus2003 was selling 3 months back :(
Anyways, the damage:
they all look pretty much like this, less scouring on the end-cap side though.
![Name: IMG_3176.jpg
Views: 272
Size: 30.0 KB](https://www.miataturbo.net/attachments/engine-performance-56/203867d1501248814-these-rods-reusable-img_3176.jpg)
Crower I-beam rods, it'd be nice if I could reuse them but I don't want to pull another engine hah.
And the rest of the damage:
#1
![Name: IMG_3172.jpg
Views: 218
Size: 30.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/203868d1501248814-these-rods-reusable-img_3172.jpg)
#2
![Name: IMG_3177.jpg
Views: 235
Size: 34.1 KB](https://www.miataturbo.net/attachments/engine-performance-56/203869d1501248814-these-rods-reusable-img_3177.jpg)
#3
![Name: IMG_3179.jpg
Views: 237
Size: 31.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/203870d1501248814-these-rods-reusable-img_3179.jpg)
#4
![Name: IMG_3182.jpg
Views: 210
Size: 45.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/203871d1501248814-these-rods-reusable-img_3182.jpg)
was cause by:
![Name: IMG_3163.jpg
Views: 203
Size: 45.1 KB](https://www.miataturbo.net/attachments/engine-performance-56/203872d1501248814-these-rods-reusable-img_3163.jpg)
head looked bad, looks like mix of coolant and oil. weird thing was that the drained oil looked fine, go figure:
![Name: IMG_3144.jpg
Views: 280
Size: 67.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/203873d1501248814-these-rods-reusable-img_3144.jpg)
Time to build another engine, I think I'm going to try to get as much work done it while its in the hands of a professional during assembly, everything reworked, acid bathed, oversized pistons, acl bearings, knife-edge crank, anything else I can think of between now and then hah. Wish me luck!
Any feedback is welcome just reaching out for advice and yes this was the short block that rogezeus2003 was selling 3 months back :(
#3
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Thats not entirely true at all. Rods will often have marks like that even when disassembling a healthy motor. If the rods have no color change or blueing from extreme temp, and both the big and small end are not out of round then they should be fine.
Those pistons on the other hand look like they have a fair amount of scuffing above the skirts.
Those pistons on the other hand look like they have a fair amount of scuffing above the skirts.
#4
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Yeah, I'm thinking that so long as the bearing didn't spin in the rod, they're probably ok. Take 'em to a machinist and use an inside mic to make sure they're still perfectly round and within spec, get some new bolts, and stick 'em back in.
How'd the cams fare?
How'd the cams fare?
#6
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Exact words I was going to use, but you have already said so. I learned that the hard way a long time ago.
So what exactly happened, I guess I missed it. If the pistons have that kind of damage, there could be unseen damage to the rods. Just because it looks good doesn't mean it is, of course.
So what exactly happened, I guess I missed it. If the pistons have that kind of damage, there could be unseen damage to the rods. Just because it looks good doesn't mean it is, of course.
#8
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Rods will often have marks like that even when disassembling a healthy motor. If the rods have no color change or blueing from extreme temp, and both the big and small end are not out of round then they should be fine.
Those pistons on the other hand look like they have a fair amount of scuffing above the skirts.
Those pistons on the other hand look like they have a fair amount of scuffing above the skirts.
Pistons ARE toast though... they'll make lovely paperweights.
#9
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Yeah i'll run them to a local machinest to get measurements. The engine literally had dirt in the passages and I tapped the oil pan incorrectly. Even though I did it step by step on the phone with fm
:(. But there was all kinds of **** in the oil pan, lots of shavings, a peice of red rubber, hell even a blue crimp was in there. Next time I'll limit the number of people helping me to two instead of five.
Wanted to tap the oil pan when it was off but my friends put it on the block when I was waiting for the drill n tap.
:(. But there was all kinds of **** in the oil pan, lots of shavings, a peice of red rubber, hell even a blue crimp was in there. Next time I'll limit the number of people helping me to two instead of five.
Wanted to tap the oil pan when it was off but my friends put it on the block when I was waiting for the drill n tap.
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Does the piston skirt really have to be in perfect condition? I always thought the skirt was for structural integrity and the rings did the sealing. The block must be pretty fucked up in the process of causing that anyhow.
If you are going to have a shop do the work, just take the block and parts in and they will let you know what can be done with what you have.
If you are going to have a shop do the work, just take the block and parts in and they will let you know what can be done with what you have.
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Yeah i'll run them to a local machinest to get measurements. The engine literally had dirt in the passages and I tapped the oil pan incorrectly. Even though I did it step by step on the phone with fm
:(. But there was all kinds of **** in the oil pan, lots of shavings, a peice of red rubber, hell even a blue crimp was in there. Next time I'll limit the number of people helping me to two instead of five.
Wanted to tap the oil pan when it was off but my friends put it on the block when I was waiting for the drill n tap.
Crank looked ok but I'll run it to a local machinest as well. I've got an extra block that I can use, it's a 97 and this one was a 94 so I'd need to get a longer oil feed. But that's the least of my worries right now lol.
:(. But there was all kinds of **** in the oil pan, lots of shavings, a peice of red rubber, hell even a blue crimp was in there. Next time I'll limit the number of people helping me to two instead of five.
Wanted to tap the oil pan when it was off but my friends put it on the block when I was waiting for the drill n tap.
Crank looked ok but I'll run it to a local machinest as well. I've got an extra block that I can use, it's a 97 and this one was a 94 so I'd need to get a longer oil feed. But that's the least of my worries right now lol.
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My second time around, i didn't even change the oil. Actually left the oil in and had no issues. This was on a junkyard motor that i care close to nothing about tho. Would never do that to a built engine..
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