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I absolutely can not believe it ! This thing was tapped up the entire time... guess I should take this as a learning opportunity. Bunch of people telling me to still run it. Looks like it dented the piston though.
Holy!! Someone dropped that brake bleeder in the intake port while you were away. I seriously doubt that this will cause any problems down the road, but if it were mine, I’d take it back down and polish the marks down. Might want to check the chamber also for marks.
I absolutely can not believe it ! This thing was tapped up the entire time... guess I should take this as a learning opportunity. Bunch of people telling me to still run it. Looks like it dented the piston though.
Originally Posted by LS299S10
1000000% something dropped into an intake port.Did you pull the intake to install it?
Originally Posted by LS299S10
Did you ever check for a foreign object in the cylinder?Did you install the engine 100% assembled?How many times do you think it was turned over from finished assembly to when it stopped turning?
Maybe it's a rocker arm problem.
I know its painful, but NO WAY I'd just fish that out and run it. I would want to check the ring grooves on that piston to make Sure it didn't get hit hard enough to narrow it up and seize the ring.
The damage looks minor, but sticking a ring would suck so bad cause the repair would be way more than doing the check now. Sometimes ya just gotta accept the suck..
My favorite mistake from a good engine builder, smart man, was he was building an old fashioned small block and did it really pretty, but they made one mistake. As it turns out, when you install the #3 piston in the #5 hole and vise-versa... it will turn over, and start, pump up the lifters, and then immediately destroy itself as the pistons hit the valves.
The head can be welded and resurfaced, certainly. Get the valves checked, might have to replace one or both. If it seized up hard enough to crack the cylinder wall, I'd be checking the connecting rod for bending too. Summit sells individual pistons, so you're good there. What block is that? Might be more economical to get a different block. Sorry to see that, it's a real bummer.
I assembled it 100% even took pictures every single step of the way for fun. I probably spun it 50 plus times just being excited seeing something I made turn over.
Do you have any pictures to share?
Is this the brand new engine you were talking about in your first post to the site?
OP....sorry your having to deal with this....we have all been down a similar road at one point or another.
I do think its very possible the piston getting wedged under the force of the starter motor (and the speed and torque it developed even in that short distance) could have thrust the piston skirt so hard into the cylinder wall that the sleeve cracked (its not out of the question and is really the most likely situation here)
Look at how hard it embedded that bleeder into a hardened cylinder head.
Also don't weld it IMO.....the heat from the weld removes some of the heat treat from the casting (making the aluminum softer there). I would just sandroll it a bit and knock off any sharp edges....don't go digging at it....just clean up anything sharp and put that right back on the engine.
You want see any loss in power or performance. Make sure its not raised off the deck either when your done....slide a straight edge across the area and make sure it isn't hitting a high spot.
Welding can compromise the integrity of the casting...to do that just so it looks pretty when you reinstall it is silly IMO.....where it hit it wont effect flow and performance.
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Found the reason 
