DIY How to replace a Vortech input shaft seal....
04-01-2010, 04:58 PM
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DIY How to replace a Vortech input shaft seal....
Step 1.
Take supercharger unit out and heat the bolt that holds the cog pulley with a torch.
Step 2.
Remove bolt and cog pulley.
Take supercharger unit out and heat the bolt that holds the cog pulley with a torch.
Step 2.
Remove bolt and cog pulley.
Last edited by 350Z400rwhp; 04-01-2010 at 05:27 PM.
04-01-2010, 05:04 PM
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And then......
Step 3.
Remove bolts that hold the outer housing together. Not necessary to heat these up and I wouldn't because there is a rubber o-ring that you could damage.
Step 4.
Pry housing off with a screwdriver (Vortech provides slots on each side for this). Take it slow and work each side up bit by bit.
Step 5.
Remove outer housing. Be careful not to lose any parts. There are two bearing covers on the top of the bearings.
Remove bolts that hold the outer housing together. Not necessary to heat these up and I wouldn't because there is a rubber o-ring that you could damage.
Step 4.
Pry housing off with a screwdriver (Vortech provides slots on each side for this). Take it slow and work each side up bit by bit.
Step 5.
Remove outer housing. Be careful not to lose any parts. There are two bearing covers on the top of the bearings.
Last edited by 350Z400rwhp; 04-01-2010 at 05:34 PM.
04-01-2010, 05:11 PM
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Step 6.
Pound out old seal with something round.
Step 7.
I froze the new seal and then applied oil to the edge and the case it was going into for extra lubrication.
Step 8.
Carefully pound in new seal with wood or aluminum. The trick is to get it to go straight in as possible. Something round and just a little larger would work better but I was able to get away with this.
Pound out old seal with something round.
Step 7.
I froze the new seal and then applied oil to the edge and the case it was going into for extra lubrication.
Step 8.
Carefully pound in new seal with wood or aluminum. The trick is to get it to go straight in as possible. Something round and just a little larger would work better but I was able to get away with this.
Last edited by 350Z400rwhp; 04-01-2010 at 05:33 PM.
04-01-2010, 05:18 PM
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Step 9.
Now that the seal is back in the housing, lubricate the inside of it with oil and lubricate the shaft with oil. Note (Clean all residue off the shaft with rubbing alcohol so that it doesn't prematurely wear your new seal)
Step 10.
This is the hardest part. Make sure the bearing covers are in place and slowly replace the housing cover. This may take a few times before everything goes into place. It will seem hard to press it on if you don't go perfectly straight down. Again work it back and fourth until it clicks into place.
Step 11.
Re-tighten cover bolts in a proper torque sequence.
All done.
Now that the seal is back in the housing, lubricate the inside of it with oil and lubricate the shaft with oil. Note (Clean all residue off the shaft with rubbing alcohol so that it doesn't prematurely wear your new seal)
Step 10.
This is the hardest part. Make sure the bearing covers are in place and slowly replace the housing cover. This may take a few times before everything goes into place. It will seem hard to press it on if you don't go perfectly straight down. Again work it back and fourth until it clicks into place.
Step 11.
Re-tighten cover bolts in a proper torque sequence.
All done.
Last edited by 350Z400rwhp; 04-01-2010 at 05:35 PM.
04-01-2010, 05:52 PM
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Thanks, I didn't have the torque specs but for the sequence I just went from opposing side to opposing side the same as when you are putting tire lug nuts back on. I just made sure they were all fairly snug, but not so tight that I was stripping out the hex nuts. If anyone does know the proper torque specs please add them to my DIY.
04-01-2010, 05:58 PM
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Thanks again for the write up. You just saved me hundreds of dollars not to mention the 3 week turn around time from Vortech. Think I'll go for the 928 impeller as well since I'm going to pull the blower anyways.
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04-01-2010, 06:08 PM
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Post up some before and after dyno charts as I'm curious as to how that 928 impeller performs. It is supposed to give about a 15% gain in boost all across the rev range along with a better tolerance for higher rpm's (60K+) if you decide to upgrade your bearings.
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