havoc_squad
Senior Chief Petty Officer
- Joined
- Mar 5, 2011
- Messages
- 739
I got my parts in to begin slowly the powerhead rebuild of the V4 crossflow motor.
I just finished my check on the end ring gap for the smallest and largest measured bore to verify it was within spec of the Wiseco pistons for just one piston. I'll still check the rest before putting them on the piston, but wanted to do a fitment test first.
Well, after this I was taking the old pistons & connecting rods attached one at a time to visually check my installation mental process along with the service manual so I don't screw this up.
While doing that check, I found that the oil hole wasn't in the correct orientation with the piston head orientation with what I labeled that piston as.
I know the factory didn't screw this up, because the motor wouldn't be in good condition if it was wrong. That's on me.
#1 had the wrong alignment, but when I moved it to the other side, it was correct.
This issue was the same on all 3 other pistons. When I removed them from the crankcase with the engine block back face down, I must have forgot to label/correct my orientation.
I am nearly 100% certain when I removed them I went from the flywheel part of the crankshaft and worked down towards the exhaust, as most what most outboard disassembly videos of professionals show.
Is there cause/need for possibly needing to buy replacement bearings due to this mix-up? I have not assembled any of the new pistons to avoid re-work of having to buy replacement piston circlips because they are one time use parts.
I just finished my check on the end ring gap for the smallest and largest measured bore to verify it was within spec of the Wiseco pistons for just one piston. I'll still check the rest before putting them on the piston, but wanted to do a fitment test first.
Well, after this I was taking the old pistons & connecting rods attached one at a time to visually check my installation mental process along with the service manual so I don't screw this up.
While doing that check, I found that the oil hole wasn't in the correct orientation with the piston head orientation with what I labeled that piston as.
I know the factory didn't screw this up, because the motor wouldn't be in good condition if it was wrong. That's on me.
#1 had the wrong alignment, but when I moved it to the other side, it was correct.
This issue was the same on all 3 other pistons. When I removed them from the crankcase with the engine block back face down, I must have forgot to label/correct my orientation.
I am nearly 100% certain when I removed them I went from the flywheel part of the crankshaft and worked down towards the exhaust, as most what most outboard disassembly videos of professionals show.
Is there cause/need for possibly needing to buy replacement bearings due to this mix-up? I have not assembled any of the new pistons to avoid re-work of having to buy replacement piston circlips because they are one time use parts.