How Does This Happen?
#3
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Re: How Does This Happen?
The c clip was in the oil pan and the wrist pin appeared fine, exepct for rounded at the end from working its way out and rubbing against the cylinder wall.
Every single piston is cracked where this one just broke. Only on one side of the piston and on the same side the wrist pins fell out.
Every single piston is cracked where this one just broke. Only on one side of the piston and on the same side the wrist pins fell out.
#6
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Re: How Does This Happen?
wow......all 4 were the same? How long had they been in that block?
Was your A/F tune good???? thats crazy that all 4 bit the bullet.....
Was your A/F tune good???? thats crazy that all 4 bit the bullet.....
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Re: How Does This Happen?
WOW....
Its hard to say specifically what caused that kind of carnage. How many miles were on the motor? How was your tune? Stock bore/sleeves? SRP pistons aren't the best but regardless they shouldn't fail as such. How do the top of the pistons look? Any other damage occur besides the obvious?
Its hard to say specifically what caused that kind of carnage. How many miles were on the motor? How was your tune? Stock bore/sleeves? SRP pistons aren't the best but regardless they shouldn't fail as such. How do the top of the pistons look? Any other damage occur besides the obvious?
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#8
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Re: How Does This Happen?
I would look at the rods and see if they were true in every dimension. I would think the pistons werent traveling square to their bores. This is odd.
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Re: How Does This Happen?
I have SRP pistons. My engine was at 248 whp for 17K miles. I have put on another 19K miles on it N/A. Keep us updated on this.
I know SRP was crap many years ago. Were these pistons from that era? I bought my pistons in August of 2005.
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Re: How Does This Happen?
The pistons had some miles on them. But I had just recently put them in a new motor. The tune sealed fine. 14s at idle high 11s low 12s in boost. Conservative timing 13-14 up top.
No other obvious damage. I'm bringing to the rods to the machine shop so they can check them out.
Any other ideas?
No other obvious damage. I'm bringing to the rods to the machine shop so they can check them out.
Any other ideas?
#13
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Re: How Does This Happen?
thats a pretty wierd failure for just 1 piston but for all 4 to fail the same way makes me lean more towards the setup or installation rather than manufacturer defect. Let us know what the machine shop says, Im curious about this now because Ive never seen anything like that
***edit*** those wrist pins did just slide right in, correct??? if they were over sized or too big for the pin hole on the piston and they were pressed in that would cause a similar failure I would think. Whats the engine btw?
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Re: How Does This Happen?
did the motor have the proper thrust clearance? Measure the endplay on the crank. Your honda might have experienced a case of crankwalk... To have all 4 of them cracked or broken on the same side obviously indicates something was 'side loaded' preventing the pistons from riding square in the bore.
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Re: How Does This Happen?
Thanks for the input, I haven't gotten around to bring everything to the machine shop yet, I am going to try to do that tomorrow
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Re: How Does This Happen?
did the motor have the proper thrust clearance? Measure the endplay on the crank. Your honda might have experienced a case of crankwalk... To have all 4 of them cracked or broken on the same side obviously indicates something was 'side loaded' preventing the pistons from riding square in the bore.
this is kinda what I was thinking.
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