SC pulley is shaking/vibrating

**dovlet** · 09-17-2017, 11:49 AM

Gents, today i realized that my SC started to make new noise which i never heard before. Removed belt and noted that my pulley is out of size and it is shaking/vibrating. Also, a lot of black and metal dust behind of pulley between SC. Found machine shope and going to press inside new aluminium and make new insert. Hope i will be success. Some one faced with this kind of issue?

20170917_131041-1280x720.jpg

**chikinhed** · 09-17-2017, 01:09 PM

This is about the time when switching to a turbo seems like a good idea........ cuz it is.

**geargrinder** · 09-17-2017, 11:05 PM

M62TU in an E39.... Tough proposition for a turbo , seems like only handful of those running around in the wild. Less if you don't count rear mounts. .

**chikinhed** · 09-18-2017, 01:08 AM

I didn't see what car he was taking about and ASSumed it was an M/S5x. My bad.

**pbonsalb** · 09-18-2017, 08:30 AM

Seems like you broke the key that locks the pulley to the shaft. Then the pulley will go back and forth and eventually wobble as it wears. If your blower shaft is not damaged get a new key and a new pulley. If the blower shaft is damaged you need a new blower shaft. I broke some keys years ago when my E36M3 was supercharged and damaged some pulleys, but I never damaged the shaft.

**geargrinder** · 09-18-2017, 08:51 AM

I said in another thread that it looks to me like there's some seal leakage there too.

**geargrinder** · 09-18-2017, 08:57 AM

Originally Posted by chikinhed

I didn't see what car he was taking about and ASSumed it was an M/S5x. My bad.

NP that's common around here of course... At least tptrsn is getting an E39 V8 top-mount turbo running these days... But as I say that's a rare bird!

**dovlet** · 09-20-2017, 02:02 PM

Few days ago requsted machine shop to make something with my old pulley. Work done perfectly at least looks like. Here is some photos
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**pbonsalb** · 09-20-2017, 03:11 PM

Creative. I think that aluminum blower pulleys have a steel center so this 2 piece pulley with a steel center and steel back might work. Let us know if it holds up. I have seen all steel blower pulleys before in the aftermarket, but they are heavier.

**dovlet** · 09-20-2017, 03:53 PM

Originally Posted by pbonsalb

Creative. I think that aluminum blower pulleys have a steel center so this 2 piece pulley with a steel center and steel back might work. Let us know if it holds up. I have seen all steel blower pulleys before in the aftermarket, but they are heavier.

That is not finished version. There will be also 2 bolts to prevent it from turning over. Will keep you updated

**jmargo** · 09-21-2017, 01:22 PM

You verified the front bearing is in good shape and there is no play in the shaft ? Definitely replace that front seal. I may have the seal part # if you need.

**geargrinder** · 09-21-2017, 01:55 PM

Originally Posted by jmargo

You verified the front bearing is in good shape and there is no play in the shaft ? Definitely replace that front seal. I may have the seal part # if you need.

This is what I have been saying. Looks to me like seal leakage there...

**dovlet** · 09-22-2017, 05:21 AM

Originally Posted by jmargo

You verified the front bearing is in good shape and there is no play in the shaft ? Definitely replace that front seal. I may have the seal part # if you need.

Do me a favor please. If you have part number I would be thankful to you.

**dovlet** · 09-22-2017, 01:57 PM

Look at this Gents, just installed my new pulley and decided to check leakages from top site on SC. Looks like my shaft seal is damaged.
<span style="color: rgb(51, 51, 51); font-size: 29.4326px; background-color: rgb(228, 228, 228);">

**jmargo** · 09-22-2017, 11:37 PM

The one I have is a CR 9725. That should be for the front shaft.
You verified no side to side play on the shaft ? If that front bearing is shot or loose in the housing you will wipe out blower.

**dovlet** · 09-23-2017, 01:49 AM

Originally Posted by jmargo

The one I have is a CR 9725. That should be for the front shaft.
You verified no side to side play on the shaft ? If that front bearing is shot or loose in the housing you will wipe out blower.

Verified. No play. I need this seal. If you know the number let me know please
SmartSelectImage_2017-09-23-10-50-58.png

**geargrinder** · 09-23-2017, 08:21 AM

Originally Posted by dovlet

Verified. No play. I need this seal. If you know the number let me know please
SmartSelectImage_2017-09-23-10-50-58.png

Originally Posted by jmargo

The one I have is a CR 9725. That should be for the front shaft.

...

**jmargo** · 09-23-2017, 05:52 PM

Originally Posted by dovlet

Verified. No play. I need this seal. If you know the number let me know please
SmartSelectImage_2017-09-23-10-50-58.png

Thats the output shaft seal. Goes between the case and the impeller.

The input shaft seal is between the pulley and case and can be seen externally.

**Braymond141** · 09-24-2017, 01:52 PM

Originally Posted by dovlet

Look at this Gents, just installed my new pulley and decided to check leakages from top site on SC. Looks like my shaft seal is damaged.
<span style="color: rgb(51, 51, 51); font-size: 29.4326px; background-color: rgb(228, 228, 228);">

The V3 charger is vented through those brass fill/dipstick inserts. This test is only showing that it is working properly.

The input seal isn't a huge concern here, you have a V3. There is little pressure being built up to force the oil out of that seal like a V1 or V2 would with engine oil pressure being fed in. Should you replace it? Yes... but don't stress it. If your charger isn't losing any significant amount of oil, it isn't an immediate concern. Just do the seal when the charger needs a full rebuild (or just get a full rebuild done anyway).

I don't quite understand having a custom pulley made. Vortech sells pulleys for $60-80 brand new. Future proofing with the steel hub, ok maybe... and I know your location probably takes time to get parts to. Hope the new setup is worth it.

**geargrinder** · 09-24-2017, 07:14 PM

Yeah I'm sure it was a case of "local fix cheap and fast" vs "factory part overseas wait for shipping". Makes sense for Dov.

**dovlet** · 09-30-2017, 01:50 PM

Originally Posted by Braymond141

The V3 charger is vented through those brass fill/dipstick inserts. This test is only showing that it is working properly.

The input seal isn't a huge concern here, you have a V3. There is little pressure being built up to force the oil out of that seal like a V1 or V2 would with engine oil pressure being fed in. Should you replace it? Yes... but don't stress it. If your charger isn't losing any significant amount of oil, it isn't an immediate concern. Just do the seal when the charger needs a full rebuild (or just get a full rebuild done anyway).

I don't quite understand having a custom pulley made. Vortech sells pulleys for $60-80 brand new. Future proofing with the steel hub, ok maybe... and I know your location probably takes time to get parts to. Hope the new setup is worth it.

Oh, is it? I can really still use my SC if there is no sagnificant loss in oil? Thanks for info.

- - - Updated - - -

Originally Posted by geargrinder

Yeah I'm sure it was a case of "local fix cheap and fast" vs "factory part overseas wait for shipping". Makes sense for Dov.

Yep, the currently it is about 2month to wait overseas post. Also, most of suppliers does not want to supply to my country. Plus, i have never seen SC pulley cost less than 80$.

- - - Updated - - -

By the way Gents, what is the alternative oil i can use for my SC? I want to know if in case i have no original one. Is the dex3 or 4 automatic hydraulic oil ok?

**geargrinder** · 09-30-2017, 02:11 PM

Vorteach oil is supposedly royal purple synthetic ATF.

You interpret how you like... Your decision after that.

**dovlet** · 09-30-2017, 03:29 PM

Originally Posted by geargrinder

Vorteach oil is supposedly royal purple synthetic ATF.

You interpret how you like... Your decision after that.

Tqvm.

**philly98540** · 09-30-2017, 07:45 PM

Originally Posted by geargrinder

Vorteach oil is supposedly royal purple synthetic ATF.

You interpret how you like... Your decision after that.

Really! Good to know. Reliable source?

**geargrinder** · 09-30-2017, 10:23 PM

We published this in the VF Addendum way back I think! Couple sources have said they got Vortech techs to confirm that (although nothing in print from them for obvious $$ reasons). If you're worried don't trust me... I take no responsibility etc etc. Buy the real stuff... However...

Knowing most of these blowers actually run fine on dirty motor oil, personally I can't imagine iT could be that hypercritical, and one would suspect ATF is exactly the right kind of fluid for the application (temps and stresses can't nearly approach that of an actual auto so one would think it'd even be overspecified...) So seems pretty plausible that's the deal.