Kryndon
Proven Member
- 944
- 591
- Jan 10, 2014
-
Bulgaria,
Europe
Trying to rebuild my evo 3 16G with a superback rebuild kit (UK made). Before disassembly, I scribed the shaft, nut and compressor wheel since they were balanced as a whole unit by the looks of it. Here are the issues:
1. I could not remove those two inner retaining clips. All I could fit in there is a small flathead screwdriver but I don't see how I need to bend or twist it to come out. I feared I might scratch the bearing surfaces too much so I just let the old ones stay.
2. The larger diameter thrust collar (18mm) looks to be too close to the edge. I tried pushing down on it even further and rotating it with my fingers, and it does rotate but I'm not sure how it should feel. I was told that machining of the housing should not be needed to make this upgraded collar fit.
3. Even though I scribed all 3 components initially, I'm finding it very hard to both hold the turbine wheel in place, while trying to line up the shaft with the nut and compressor. When I align them all then try to hand snug the nut, then when I try to do the 1/4 turn to tighten it, the nut grabs onto the compressor and moves it out of alignment. Is there a magic way of re-aligning everything and tightening it? Here's how it looked before removal.
4. Now, in addition to the problem in point 3, the biggest issue is that even after I tighten it all down (nut compressor shaft), trying to rotate it by hand is hard. It definitely doesn't move as freely as before taking it off. Granted, I did use this type of chain lube which also works for assembling stuff. It's kind of thick but very similar to normal assembly lube. Could it be from that? The thing is, if I try to rotate it one full revolution, it gets really hard to turn at one point, then becomes a bit more free again. Also, if I lined my eyes with the surface of the compressor housing where the compressor wheel rides against, I could see one side of the wheel dipping slightly each revolution in the exact same spot. I highly doubt it's a bent shaft or impeller. Both the snap rings snapped easily in place, so it's not that either. My worry is if that thrust collar is trying to rotate with the assembly and binding up, or if the oil seal plate is not equally pushed down by the circlip. Here's a picture:
I stopped at this point, my fingers froze off anyway. I would really appreciate any pointers to what might be happening or if I may have done something wrong.
1. I could not remove those two inner retaining clips. All I could fit in there is a small flathead screwdriver but I don't see how I need to bend or twist it to come out. I feared I might scratch the bearing surfaces too much so I just let the old ones stay.
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2. The larger diameter thrust collar (18mm) looks to be too close to the edge. I tried pushing down on it even further and rotating it with my fingers, and it does rotate but I'm not sure how it should feel. I was told that machining of the housing should not be needed to make this upgraded collar fit.
You must be logged in to view this image or video.
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3. Even though I scribed all 3 components initially, I'm finding it very hard to both hold the turbine wheel in place, while trying to line up the shaft with the nut and compressor. When I align them all then try to hand snug the nut, then when I try to do the 1/4 turn to tighten it, the nut grabs onto the compressor and moves it out of alignment. Is there a magic way of re-aligning everything and tightening it? Here's how it looked before removal.
You must be logged in to view this image or video.
4. Now, in addition to the problem in point 3, the biggest issue is that even after I tighten it all down (nut compressor shaft), trying to rotate it by hand is hard. It definitely doesn't move as freely as before taking it off. Granted, I did use this type of chain lube which also works for assembling stuff. It's kind of thick but very similar to normal assembly lube. Could it be from that? The thing is, if I try to rotate it one full revolution, it gets really hard to turn at one point, then becomes a bit more free again. Also, if I lined my eyes with the surface of the compressor housing where the compressor wheel rides against, I could see one side of the wheel dipping slightly each revolution in the exact same spot. I highly doubt it's a bent shaft or impeller. Both the snap rings snapped easily in place, so it's not that either. My worry is if that thrust collar is trying to rotate with the assembly and binding up, or if the oil seal plate is not equally pushed down by the circlip. Here's a picture:
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I stopped at this point, my fingers froze off anyway. I would really appreciate any pointers to what might be happening or if I may have done something wrong.