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Turbocharger rebuild
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tuurbo  



Joined: 09 Aug 2007
Posts: 1463
Location: East Windsor, New Jersey

PostPosted: Sun Jan 04, 2009 7:40 am    Post subject: Turbocharger rebuild Reply with quote

Finally starting to tear it down. Here's my log.

Steps to disembowel the turbocharger:

1. Mark a the line up notch using a Dremel tool for the exhaust and input housings



2. Spray down and clean up the unit using WD40 to start. Wipe off anything wipe-off-able.

3. Take copious pictures to ensure what is done can be reassembled fully.



4. Refer to Instructions where needed.



5. Here's the unit cleaned using a spray lubricant called ReleaseAll to lubricate and clean the unit before teardown.



Sorry for the picture quality.

6. Planning - I'll be cleaning the outer tomorrow when I can spare the time - just get everything. Clean out the workspace fully.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.
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tuurbo  



Joined: 09 Aug 2007
Posts: 1463
Location: East Windsor, New Jersey

PostPosted: Sun Jan 04, 2009 1:35 pm    Post subject: Reply with quote

Now you're ready:


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1980 924 turbo, MSD, Meth. Inj, otherwise stock.
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11354
Location: PacNW

PostPosted: Mon Jan 05, 2009 4:33 am    Post subject: Reply with quote

Wrong fingers. . .rookie.

Are you planning to send the rotating assembly off for balancing?
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Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11966
Location: Oregon, Denver Colorado native!

PostPosted: Wed Mar 10, 2010 6:31 pm    Post subject: Reply with quote

What happend you didnt finish.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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931Owner  



Joined: 15 Feb 2009
Posts: 352
Location: Chicago NW Suburbs

PostPosted: Mon Apr 05, 2010 4:04 pm    Post subject: Reply with quote

Can you even get a rebuild kit?
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1980 Turbo
-too many cars and too many motobikes
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11966
Location: Oregon, Denver Colorado native!

PostPosted: Tue Apr 06, 2010 3:08 am    Post subject: Reply with quote

Yea pretty much just a seal kit I think..im hopin
to avoid it though I imagine ill get one. At least gaskets and some bolts.
just depends. Maybe I can find a turbo check out place. Main thing is spinnability and sideplay. and signs of high heat & leakage. How 2 check for heat is a good one. Guess discolored metal though & if the exhaust header is cracked theres heat issues warranting a seal replacement for good measure which is a rebuild.. since your there if you can find a air spinner do that too. Its not cheap

Im guessen though for all new parts
400.00 500.00. you want a reputabuble shop to or it wont last and will leak. I dont know what Ill do with mine.. there a couple of friends I can take it too for advice. They build porsches. After that Id pick a shop.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.


Last edited by Joes924Racer on Wed Apr 07, 2010 2:33 pm; edited 1 time in total
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931Owner  



Joined: 15 Feb 2009
Posts: 352
Location: Chicago NW Suburbs

PostPosted: Wed Apr 07, 2010 5:12 am    Post subject: Reply with quote

I found on a Nissan forum (of all places) someone rebuilding a KKK26 turbo
who found the rebuild kit at turbo city for $105.09.

http://www.nissanforums.com/forced-induction-nitrous-oxide/118859-turbo-rebuild-questions-need-help.html

http://www.turbocity.com/product_info.php?products_id=170

Need a kit? Here is their catalog.
http://www.turbocity.com/documents/TurbochargerMatrix.pdf
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1980 Turbo
-too many cars and too many motobikes
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11966
Location: Oregon, Denver Colorado native!

PostPosted: Wed Apr 07, 2010 5:32 am    Post subject: Reply with quote

Gold mine. nice of you to put it in the chest. Now its a treasure chest.

Are you waiting on a kit so you can give us ayour howto.. we want it.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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931Owner  



Joined: 15 Feb 2009
Posts: 352
Location: Chicago NW Suburbs

PostPosted: Wed Apr 07, 2010 5:43 am    Post subject: Reply with quote

I'll check for the state of the turbo when I get it out. I do remember seeing puffs of blue smoke in the mirror (though a little) under acceleration when we purchased it.

The rebuild seems easy enough to do so I'll probably give it a go and document it. Seems a $100 kit is cheaper than $600 for a rebuild.
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-too many cars and too many motobikes
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ideola  



Joined: 01 Oct 2004
Posts: 15503
Location: Woodstock IL

PostPosted: Wed Apr 07, 2010 5:57 am    Post subject: Reply with quote

There's more to a proper rebuild than a seal kit...

...and you can get a rebuild done by Majestic for ~$350 or so, provided the core components don't require any major repairs.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11966
Location: Oregon, Denver Colorado native!

PostPosted: Wed Apr 07, 2010 2:36 pm    Post subject: Reply with quote

yea i know spinability of the fan... sideplay worn out bushings
and a worn out fan. Dont turbos get plugged up to Ive heard the term coked up.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11354
Location: PacNW

PostPosted: Wed Apr 07, 2010 2:44 pm    Post subject: Reply with quote

yeah just give er a twirl
twirls good runs good
boost is speed speed is fun
gitter done
and don't worry about bein coked up
haters will never understand
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  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
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fiat22turbo  



Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR

PostPosted: Wed Apr 07, 2010 2:47 pm    Post subject: Reply with quote

Yes the oil overheats, cooks and turns to carbon and plugs up the oil passages. Usually this happens because people shut the turbo down without letting it cool-off, running cheap oil, overheating the oil and/or not changing it often enough.

Basically turbo cars are perfectly reliable provided you treat them as performance engines, not some slant 6 in 'pa's old pick em up truck. That means, changing the oil, leaks, paying attention to the quality of the fuel you use, etc.

Later water-cooled turbo center sections helped cool the turbos after they were shutdown (and to a lesser extent while they were running) because the water will percolate and circulate while the cast iron transfers the heat into the water. A small coolant pump that runs after shut down for a little bit can help a lot with reducing hot spots and improving cooling efficiency across the board.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11966
Location: Oregon, Denver Colorado native!

PostPosted: Wed Apr 07, 2010 4:42 pm    Post subject: Reply with quote

Yup that was my problem i always treated my NA like it had
a performance engine. I was always missen something.. it was
turbo.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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DZGunner  



Joined: 18 Nov 2014
Posts: 129
Location: Great white north

PostPosted: Fri Jan 16, 2015 7:31 pm    Post subject: Reply with quote

I know this post is from years ago but was this ever documented with pictures? I'm hoping to do this soon.

Also if anyone knows, where does the little elbow piece go to on the car? i mean it seems like it should only carry air as its nothing to do with oil, hoe ever my rubber elbow piece is cracked and leaking what appears to be fresh oil. i've only recently got the car from someone else so idk what happened or what this indicates, any input? I'm just wondering if this is a sign i need a rebuild or something else is going on, thanks
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