Diff housing cracks - 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 09-10-2012, 09:23 PM   #1
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: May 2011
Location: Lebanon, TN
Posts: 1,668
Total Cats: 63
Default Diff housing cracks

Trying to put my new to me 3.9diff in my 4.3 housing tonight. Was cleaning up the housing to install the diff carrier and noticed these cracks. They don't go all the way through and are barely noticeable to a fingernail. Should I be worried? Or is this a normal thing?


Attached Thumbnails
Diff housing cracks-986ol.jpg   Diff housing cracks-dorv3.jpg  
TorqueZombie is offline   Reply With Quote
Old 09-10-2012, 10:13 PM   #2
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,372
Total Cats: 1,336
Default

Casting flash. You'll find it all over the oil pan too. No concern at all.
Savington is offline   Reply With Quote
Old 09-10-2012, 10:17 PM   #3
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: May 2011
Location: Lebanon, TN
Posts: 1,668
Total Cats: 63
Default

Thanks. Didn't want to call and bug ya. Figured that's what it was. Wanted to double check in case of.
TorqueZombie is offline   Reply With Quote
Old 09-10-2012, 10:35 PM   #4
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,687
Total Cats: 216
Default

^What he said.

You see the same thing in aluminum engine blocks all the time.
Full_Tilt_Boogie is offline   Reply With Quote
Old 09-10-2012, 11:48 PM   #5
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 Full_Tilt_Boogie View Post
^What he said.

You see the same thing in aluminum engine blocks all the time.
I'd love to open the hood of my car and see aluminum casting flash on my block, instead I have this iron ****.
hustler is offline   Reply With Quote
Old 09-11-2012, 12:06 AM   #6
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

Actually I'd much rather see a high flowing head on our engines instead of an aluminum block.

Look at the 4g63: iron block closed deck and raping face basically embarrassing 80% of the other 4 cylinders in the world
18psi is offline   Reply With Quote
Old 09-11-2012, 05:43 AM   #7
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Quote:
Originally Posted by 18psi View Post
Actually I'd much rather see a high flowing head on our engines instead of an aluminum block.

Look at the 4g63: iron block closed deck and raping face basically embarrassing 80% of the other 4 cylinders in the world
Given the average HP numbers of a 4g63 it may as well be a V8.
Faeflora is offline   Reply With Quote
Old 09-11-2012, 08:30 AM   #8
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

get one of those semi-hard buffing wheels throw it on a drill and clean those off if it bothers you. Doing that should make it less prone to cracking. Exactly how less prone? Could be anywhere between not much and allofit.
Leafy is offline   Reply With Quote
Old 03-04-2013, 12:26 PM   #9
Newb
 
Join Date: Mar 2010
Posts: 1
Total Cats: 0
Default

So glad you all posted this. I just cleaned up a 4.10 Torsen and found the same "cracks" and was very concerned. Thanks! Now I feel comfortable proceeding.

Eric
'92 Black & Tan
ecm56 is offline   Reply With Quote
Old 03-04-2013, 01:13 PM   #10
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,392
Total Cats: 58
Default

Quote:
Originally Posted by 18psi View Post
Actually I'd much rather see a high flowing head on our engines instead of an aluminum block.
Adapting a race casting 91mm c-c head?
www.motordesign.se
I'm too cheap to even ask them, the exhaust on the other side would be a minor problem.
NiklasFalk is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM


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 12:57 PM.