found out why my motor locked up, pics inside...
03-16-2008, 06:21 PM
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found out why my motor locked up, pics inside... my motor seized up on me a while back during a "spirited banzai run" and i feared the worst...and i was right. i had JUST got back from getting it tuned. it made 452rwhp and ~400rwtq. below is a picture of a couple rod bearings. the FIRST PICTURE IS BOTH HALVES OF ONE BEARING, the others are pics of the adjacent rod bearing on the same journal.....enjoy 
^--- you can't tell where one half starts and the other stops
when all the damage occured, the car just shut off, like someone turned the key. no knocks, no pings/pops, nothing....just died. time for something new
^--- you can't tell where one half starts and the other stops
when all the damage occured, the car just shut off, like someone turned the key. no knocks, no pings/pops, nothing....just died. time for something new
03-16-2008, 07:30 PM
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Wow so this was pretty much out of the blue. You say you just got it tuned. Was this the first tune after the H/C/I, if so that means they had not been on very long. Any thoughts on what would make a low mileage bearing go? Were there any recent rev limiter bounces or any in the past?Maybe a mechanical over rev? Did your motor spend a lot of time near red line? My H/C/I was on from 30k to 60k T/A but I also babied that car. Could this have been an oiling issue? I do not know Those are just some ideas I am throwing out there.
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03-17-2008, 04:43 PM
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https://ls1tech.com/forums/lsx-parts-sale/883888-ported-painted-fast-90-90-complete-exhaust-ls1-shortblock-rockers-tons-stuff.html it's all for sale
actually it's out of a '01 SOM SS, i sold the '00 pewter SS i had long ago.
well, i had my tranny build by Tick Performance with their extreme viper package, and i had put the heads on at the same time, so i was breaking in a tranny and valve springs. the cam was already in with about 6K miles on it. after the tune, i continued to baby it a bit, just so everything could get broke in. i finally decided to let it rip one night and *poof*....it shut off close to the top of 4th, just like you turned the key off....no noises, no knocks, nothing. i stopped, tried to start it, and it went "clunk." motor hasn't turned over since. it doesn't seem to be an oiling issue, the other 6 rods were fine and there was no debris in the motor (other than some bearing material), at least nothing to inhibit oil flow. i think the rod bolts stretched and the bearing spun, a lot, until they seized up. the motor never saw the rev limiter, although it was now set at 7K.
actually it's out of a '01 SOM SS, i sold the '00 pewter SS i had long ago.
Wow so this was pretty much out of the blue. You say you just got it tuned. Was this the first tune after the H/C/I, if so that means they had not been on very long. Any thoughts on what would make a low mileage bearing go? Were there any recent rev limiter bounces or any in the past?Maybe a mechanical over rev? Did your motor spend a lot of time near red line? My H/C/I was on from 30k to 60k T/A but I also babied that car. Could this have been an oiling issue? I do not know Those are just some ideas I am throwing out there.
well, i had my tranny build by Tick Performance with their extreme viper package, and i had put the heads on at the same time, so i was breaking in a tranny and valve springs. the cam was already in with about 6K miles on it. after the tune, i continued to baby it a bit, just so everything could get broke in. i finally decided to let it rip one night and *poof*....it shut off close to the top of 4th, just like you turned the key off....no noises, no knocks, nothing. i stopped, tried to start it, and it went "clunk." motor hasn't turned over since. it doesn't seem to be an oiling issue, the other 6 rods were fine and there was no debris in the motor (other than some bearing material), at least nothing to inhibit oil flow. i think the rod bolts stretched and the bearing spun, a lot, until they seized up. the motor never saw the rev limiter, although it was now set at 7K.