Re-visiting Nosedrive drains - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-17-2006, 01:12 PM   #1
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Default Re-visiting Nosedrive drains

In response to a PM asking how it works for me:

Quote:
Yup. It'* really cool. It starts to dribble slowly when I open the drain, and really flows when I open the SC plug.

I've done it once since the install. Drains right out when it'* pre-warmed. And with the drain placement, It'* at the low point. I jack up the RF for a couple minutes to get any extra out of the ND bearings (there'* actually oil between them), then lower it back down to finish.
NOTE:
Jacking the RF isn't required. But all of our superchargers, with or without a drain trap a little bit of oil between the two bearings in the nosedrive. Jacking up the RF for a minute or two will help drain this out as well.

Reposting my original, as I'd like to see more M62'* do this, and see someone find the best workable spot for an M90:


Quote:
The fitting I chose is rated for 6000psi @ 70F, or 100psi @ 250-400F. Nosedrive temps from the WCBF crew (thanks to the Bullet) peaked at 160F after each run on a 100+ day. So a 200 rating would be safe (considering your fitting or valve, if you choose to do this, would be somewhat in the moving airstream).

Centerpunch your start hole:



Drill a pilot hole:



Notice how it will overlap the ridge? And pick up the 'low spot'?



Drill with a letter "R" drill:



I missed by a tidbit, but it'll all work out in a minute or two:



Tap with a 1/8-27 (NPT) tap:



Test fit:



These 3 pics show how I shaped a 'cup' or 'pickup channel' to make sure it fully drains:






The angle you want for an M62 to be able to gain easy access. Roughly 'aimed' at the end of the ND shaft:


Seal appropriately. I'm using the red goop. We're all familiar with that stuff.
I made some minor changes to the drain hardware before install:

Quote:
Starting the mess yesterday:



Bo was bored, but enjoyed the brief lapse in the foul weather:



5 months of running doesn't look too bad. SC outlet gasket lifted off in one piece:



Belt dust? From the Accessory belt. Tensioner was weak. It'* running with a new one now, upgraded to a 3.25" oversized pulley to make up for the smaller Alt pulley
(this is with a GATES belt I might add, the Gatorback on the other path is fine):



Water injection (even with infrequent use) keeps SC rotors pretty clean, doesn't it?



New drain for the nosedrive:



Another view of the drain:

This install was Jan 29th, nearly a year ago. Never dripped a drop, and works great.
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Old 10-19-2006, 12:09 AM   #2
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This an an EXCELLENT Series one mod.
Especially once you are spinning the SC at insane rpms in comparission to stock..you need to change that oil a bit more..not necessarily because it requires it, but, its a nice peice of mind...M90s are a DREAM to change in comparission..but with this mod, you're laughing
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Old 10-19-2006, 12:13 AM   #3
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There'* a nasty side-effect. That brand new coupler I installed on Jan29th started showing signs of failure about 2 months ago. Purely a result of the 2.0" pulley, but what this means for the drain is that I'll use it only once a year, then have to pull the nosedrive for a coupler change.

Drain it at 6 months, pull at 12.
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Old 10-19-2006, 12:21 AM   #4
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I kinda figured that 2" would be hard on the coupler..something about..idle to WOT in short burps..that i think MIGHT be hard on it..
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Old 10-19-2006, 07:58 AM   #5
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Quote:
Originally Posted by SSEimatt93
I kinda figured that 2" would be hard on the coupler..something about..idle to WOT in short burps..that i think MIGHT be hard on it..
You might have something there Matt....

M90'* are nice to change in comparision the the M62, no doubts there.
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Old 10-19-2006, 09:47 PM   #6
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Willwren is this with an OEM coupler or a ZZP "Green" one?
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Old 10-19-2006, 10:37 PM   #7
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ZZP/Intense Coupler
im sure its cheaper than an OEM Eaton coupler and easier to get your hands on.
Plus u can get the nifty Service kits from INTENSE
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Old 10-19-2006, 10:39 PM   #8
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Quote:
Originally Posted by SSEimatt93
ZZP/Intense Coupler
im sure its cheaper than an OEM Eaton coupler and easier to get your hands on.
Plus u can get the nifty Service kits from INTENSE
He is asking if the coupler will "killed" was a stock one or the revised ZZP coupler.


Yes it was a green unit

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Old 10-19-2006, 11:00 PM   #9
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Bill had an oem coupler..
in 2002?
That was on his FIRST supercharger as well.
A car like his requires a few.
Gotta test **** out u know eh!
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Old 10-19-2006, 11:49 PM   #10
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Zilla'* OEM supercharger (since ported and polished) now lives on Driverjohn'* 92 SSEi If I'm not mistaken.

The coupler in the Zilla'* CURRENT SC was installed when that Gen3 swap was installed in January of this year.

It was a ZZP coupler, and is in no way defective. The abuse the 2.0" Pulley applies to the coupler is the sole reason for the early failure.
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