Rack depowering - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 09-18-2011, 10:20 PM   #1
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default Rack depowering

Ok I have a confession to make. This is not a miata rack. It's for an old VW rabbit. However, this is the best technical forum I know, and the only one (besides rx7 club) that covers this process well.

So anyway, I'm following the miata instructions for depowering a rack, and it's actually almost exactly the same. I'm about done, but now I want some advice from you experts.

On the pinion shaft is a seal assembly. there is a very slight amount of play between the shaft and this seal barrel.

I don't see a separation between the pinion and the quill shaft, and this rack either does not have one, or it's underneath the seal.

I think I'd like to remove the seals similar to the way you do it on the main shaft of the rack, but I wanted some more experienced eyes to take a look at the shaft before I do anything stupid. I appreciate your expertise.

Take a grinder to it? leave it alone? There is a metal cover and o-ring seal that slides above this one to keep crud out of the rack, I believe this seal assembly is simply for power operation.



Attached Thumbnails
Rack depowering-imag0130-2-.jpg   Rack depowering-imag0131-2-.jpg  

Last edited by tasty danish; 09-18-2011 at 10:31 PM.
tasty danish is offline   Reply With Quote
Old 09-18-2011, 10:30 PM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by tasty danish View Post
I think I'd like to remove the seals similar to the way you do it on the main shaft of the rack, but I wanted some more experienced eyes to take a look at the shaft before I do anything stupid. I appreciate your expertise.
.
Oh the ironing.
hustler is offline   Reply With Quote
Old 09-18-2011, 10:31 PM   #3
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default

It was douching up and not loading them. fixed

damn your ninja edit making this post not make sense.
tasty danish is offline   Reply With Quote
Old 09-18-2011, 10:37 PM   #4
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

I removed the barrel on my rack and placed it in the landfill. I can't help aside from that.
hustler is offline   Reply With Quote
Old 09-18-2011, 10:38 PM   #5
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default

I haven't done this on a miata rack yet, are you saying they have a seal assembly similar to what I have? What did you do to remove them?
tasty danish is offline   Reply With Quote
Old 09-18-2011, 10:43 PM   #6
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by tasty danish View Post
I haven't done this on a miata rack yet, are you saying they have a seal assembly similar to what I have? What did you do to remove them?
The barrel in the picture slid off. The seal on the rack that divides fluid was cut with a grinder and hammered off. Although it may not look like it, there has to be some play to let the bleed valve do it's thing.
hustler is offline   Reply With Quote
Old 09-18-2011, 10:47 PM   #7
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default

Isn't that the pinion shaft in the picture? Or did you mean the seal on the main shaft? (I already grinded/chiseled that one off)

So on the miata, there is nothing holding that seal assembly solid on the shaft?
tasty danish is offline   Reply With Quote
Old 09-18-2011, 10:50 PM   #8
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Sorry, check the edit.
hustler is offline   Reply With Quote
Old 09-18-2011, 11:04 PM   #9
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default

ok, so I'm going to try taking a grinder to the pinion seal assembly. it will not slide off and appears to be separate to the shaft itself.
tasty danish is offline   Reply With Quote
Old 09-23-2011, 02:39 AM   #10
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Sep 2009
Location: Yamato Japan
Posts: 692
Total Cats: 26
Default

operation was a success. I ground off the seal assembly exactly like on the main shaft, fell off, and underneath saw the joint as in the miata pinion shaft. Had it tigged.

New question Mr. hustler: was setting the pre-load pretty trial and error for you? I've read how you tightened to 45 inlbs and then half of 45* back for ideal pre-load.

Problem is, with this rack I have no literature to guide me. It's VERY similar to the miata rack so I thought I've follow its procedures, though I found if I went to 45inlbs, I could no longer cycle the rack by hand on the bench. It stops around 30inlbs.

Doing some reading on other car forums, so Nissan drifter types that did this simply tightened the preload screw till it barely contacted the shim and called it good.
tasty danish is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Lots of stuff from my NA BRG partout. Corifto Miata parts for sale/trade 8 10-04-2015 05:30 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM
Advanced Engine Dynamix Review (dead oil pump content) itsMikey Insert BS here 0 09-05-2015 03:56 PM
how does my oil return look? akaryrye DIY Turbo Discussion 14 12-30-2006 11:50 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:42 AM.