SC bearing seized with only 15 hrs on it (RIVA kit). Tore up all the oil pumps and flywheel.
I thought you previously said it failed after 25 hrs of operation after you'd rebuilt it? Where'd the other 10 hrs run off to?
So many ways to have one of these things fail I swear... I just finished rebuilding my '06 RXT's supercharger (seal was starting to leak, and it was at 96 hrs already so almost time anyway). Makes me nervous as all get-out reading your post here! I took something like 3 weeks to rebuild mine (yeah I know, I was obsessive and went extremely slow questioning every part and every step of the instructions). Still managed to make a mistake, when I went to put it back in the engine earlier this week noticed it wasn't snugging up flush there was 1/32 or so of gap where there should have been none... and the impeller had not a smidgen of play left in it like it was frozen solid! (There should be a slight amount of movement, from the gear lash.)
Pulled it right back out WITHOUT trying to tighten it down any further, could'a sworn there was a washer on either end of the spacer that goes on the shaft between the bearings, but sure enough a closer look at the instructions only showed a single washer on the side of the spacer next to the inner bearing... arghhh! Pulled it all apart again to get the extra washer off the frickkin shaft and put it back together again (getting A LOT better at it the 2nd time around now!). Put it back into the engine today and this time it went together flush when I tightened the 3 bolts without any problem... impeller has the tiny bit of play in it I expected! Yay!
fyi: Though the instructions call for blue loctite on both shaft nuts, I use blue on the outer acorn nut and RED loctite on that inner nut just for safety sake! Have to heat it a little bit (gently!) with a propane torch to ever get that nut loose again, but I'm OK with that!
fyi: Don't know about you but I don't have a hydraulic press to push the bearings in or out (since I had to take it apart again), so I improvised using my pickup truck hitch and it's heavy duty screw type jack (cleaned both really well 1st of course). Works like a charm! They say not to hammer on these bearings if you don't want them to fail... not saying you did, just saying that's all.
fyi: Used a spent needle (I have animals and 1 had to have some antibiotic injections recently and still had 1 of the needles on hand) to squirt some 4TEC engine oil into the bearings and into the shaft several times (about 1 cap full total) letting it seep down thru the SC overnight before I installed it today!
Lastly, did you have the bearings oriented the right directions? They go in a certain way (bearing shield should face outwards toward the impeller, both bearings). Easy to mess that up too! From your pics I think your spring washers aren't in the same order as mine or the instructions that came with my kit... not sure they're wrong or would have anything to do with the fried bearing, they just don't look the same as mine for some reason. Be sure and check that against a manual or something!
- Michael
