408 Shortblock recently purchased with piston reliefs facing upside down
03-01-2015, 12:31 PM
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408 Shortblock recently purchased with piston reliefs facing upside down I recently purchased a 408 short block.. To make a long story short I noticed that the valve reliefs were toward the bottom of the piston.. Basically each pistion needs to be turned 180 degrees in the cylinder to facing the right way.. Before I change this will I need to have everything re balanced? Wiseco 6464x3 Piston
03-01-2015, 01:24 PM
#4
Nice.
The engine definitely has to come back apart, but you shouldn't have to rebalance, unless the guy that balanced it is the same guy that assembled it...
Hopefully it can go right back together in the appropriate cylinders, but I'm betting the pistons and rods need to come apart to be corrected.
The engine definitely has to come back apart, but you shouldn't have to rebalance, unless the guy that balanced it is the same guy that assembled it...
Hopefully it can go right back together in the appropriate cylinders, but I'm betting the pistons and rods need to come apart to be corrected.
03-01-2015, 01:29 PM
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[QUOTE=KCS;18690694]Nice.
The engine definitely has to come back apart, but you shouldn't have to rebalance, unless the guy that balanced it is the same guy that assembled it...
Hopefully it can go right back together in the appropriate cylinders, but I'm betting the pistons and rods need to come apart to be corrected.[/QUOTE
Do you think it's possible that the pistons were just installed upside down?
The engine definitely has to come back apart, but you shouldn't have to rebalance, unless the guy that balanced it is the same guy that assembled it...
Hopefully it can go right back together in the appropriate cylinders, but I'm betting the pistons and rods need to come apart to be corrected.[/QUOTE
Do you think it's possible that the pistons were just installed upside down?
03-01-2015, 02:09 PM
#7
1. The pistons and rods were assembled correctly (tangs away from reliefs) and they just need to be flipped in the bores. This may have damaged the rod bearings in this scenario as the radius of the crank could have rubbed the bearing.
2. The pistons and rods were not assembled correctly, and the spirolox need to be removed, pin pulled out, and pistons need to be flipped on the rods and put into the correct cylinders (opposite bank).
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03-01-2015, 02:34 PM
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That's what it looks like, but there's two ways that could have happened:
1. The pistons and rods were assembled correctly (tangs away from reliefs) and they just need to be flipped in the bores. This may have damaged the rod bearings in this scenario as the radius of the crank could have rubbed the bearing.
2. The pistons and rods were not assembled correctly, and the spirolox need to be removed, pin pulled out, and pistons need to be flipped on the rods and put into the correct cylinders (opposite bank).
1. The pistons and rods were assembled correctly (tangs away from reliefs) and they just need to be flipped in the bores. This may have damaged the rod bearings in this scenario as the radius of the crank could have rubbed the bearing.
2. The pistons and rods were not assembled correctly, and the spirolox need to be removed, pin pulled out, and pistons need to be flipped on the rods and put into the correct cylinders (opposite bank).
Thanks bro