machine shop screw up?
machine shop screw up? I got my LS3 back from the machine shop a few weeks ago and today got around to getting it into the truck. It was originally a L92, clean running motor, low miles; 20k-ish. I re-used the stock crank, the piston set up was a forged piston and rod combo from wiseco with K1 rods. Bore size 4.070. Cam is from texas speed, all new bearings, no real machine work other than the slight bore. I pulled the truck pan to install a LS2 pan/pick-up/ windage tray and there were metal shavings in the back of the pan and in the windage tray right underneath the reluctor wheel. size wise, they are like very small shavings from drilling or tapping something almost, nothing big really. But what could they have machined on the block to make chunks that big? This was basically rods and pistons in a stock block. Im going to go in and raise hell monday, but im just curious, could any process in an otherwise stock rebuild produce pieces of metal this big? they are aluminum too. here is a camera phone pic of some of it, there was more in the pan. I know there probably isnt much explaination I can get here but im just f-in pissed!! 
good point, I hadnt thought of that. Windage tray is off, but the pan is on for a test fit, ill have a look today
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nope, engine was a runner when it went to the machine shop. The dealer I bought it from said that it had a bottom end noise and thats why they pulled it, but everything in the motor was within spec when it was taken apart for the rebuild, heads as well.
no milling on the head, they did lightly surface the intake port side and exhaust port side, but so lightly I can still see where the last gaskets were stuck on, so it was more to just knock any junk off, no real material removed.
check the length of the cam plate bolts . . .
They have to be the shorter bolts when compared to the bolts for the covers and oil pan.
Meaning, the regular cover bolts are too long to be used on the cam pate cover, if they're too long, they'll hit the counter weight on the crank.
They have to be the shorter bolts when compared to the bolts for the covers and oil pan.
Meaning, the regular cover bolts are too long to be used on the cam pate cover, if they're too long, they'll hit the counter weight on the crank.
check the length of the cam plate bolts . . .
They have to be the shorter bolts when compared to the bolts for the covers and oil pan.
Meaning, the regular cover bolts are too long to be used on the cam pate cover, if they're too long, they'll hit the counter weight on the crank.
They have to be the shorter bolts when compared to the bolts for the covers and oil pan.
Meaning, the regular cover bolts are too long to be used on the cam pate cover, if they're too long, they'll hit the counter weight on the crank.
Well the problem turned out to be someone ran the flywheel bolts into the crank without the flywheel on it so they could put a breaker bar in there and roll the motor over. They were just long enough to come into contact with the block and just gently scrape metal off as the block was rolled over.
