240Z, 260Z, 280Z Brakes, Wheels, Suspension and Chassis Discussions related to performance suspension, wheels, brakes and chassis.

Diff crossmember bolts

Old 01-27-2015, 10:16 AM
  #1  
Pez
Registered User
Thread Starter
 
Join Date: Oct 2012
Location: Fort Wayne, IN
Posts: 135
Diff crossmember bolts

So a few months ago I started my winter z projects, among them was the install of an RT diff mount, which involved removing the crossmember that held the previous diff mount.

When I took this off, three of the four bolts were 14mm, the last one however was 15mm, and was quite loose. As I was reinstalling the crossmember, I notice that this bolt hole is actually stripped.

So my plan is to take one of the existing (correct) bolts to a fastenal and get the next larger size metric bolt with the same thread pitch, and a drill bit and tap to match. Drill the hole, tap it and then reinstall.

Should work, right?
Pez is offline  
Old 01-27-2015, 10:42 AM
  #2  
Registered User
 
Skully's Avatar
 
Join Date: Feb 2002
Location: Saskatoon, SK
Posts: 2,886
Yes for sure you can drill out out and retap it. As long as there is enough meat there to do so. If you are doubtfull, you could always helicoil it.
Skully is offline  
Old 01-29-2015, 07:25 AM
  #3  
I have a present for you...
 
theramz's Avatar
 
Join Date: Mar 2003
Location: dayton, nevada usa
Posts: 1,661
15 mm is not a standard thread size. Are you measuring the wrench size or the thread O.D.? Could even be a S.A.E. thread someone used for the repair.
theramz is offline  
Old 01-29-2015, 10:22 AM
  #4  
Pez
Registered User
Thread Starter
 
Join Date: Oct 2012
Location: Fort Wayne, IN
Posts: 135
Originally Posted by theramz View Post
15 mm is not a standard thread size. Are you measuring the wrench size or the thread O.D.? Could even be a S.A.E. thread someone used for the repair.
the wrench size... that's how I realized something was amiss... didnt realize the scope of the issue until I was putting it back together... I think the bolts are M10x1.5... guessing, havent measured.
Pez is offline  
Old 05-03-2015, 10:30 PM
  #5  
Registered User
 
lumens's Avatar
 
Join Date: Mar 2014
Location: North Central
Posts: 23
Don't assume the bolt size is bigger. Just about all the aftermarket bolts of the same size come with a larger bolt head size.
lumens is offline  
Old 12-30-2015, 08:07 PM
  #6  
Registered User
 
Join Date: Dec 2015
Posts: 17
You should be looking for a 10mm bolt thread size. A 10mm bolt typically has a 15mm hex head but on the Datsun Z cars most 10mm thread bolts have 14mm hex heads, also known as JIS bolts. These smaller heads often help in tight areas where a larger head or wrench will not fit. Here is an example of JIS 10mm:

https://zcardepot.com/suspension/rea...260z-280z.html
zzznuts is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
z31Tennessee
Wanted (WTB / WTT)
0
02-13-2014 06:58 AM
hawaii_dotson
300ZX (Z31) Forums
0
11-14-2012 09:54 PM
HexaggramJDM
300ZX (Z32) Forums
1
10-10-2010 11:41 PM
pmr2000
300ZX (Z31) Brakes, Wheels, Suspension and Chassis
4
03-13-2006 10:14 AM
Airpilot16
240Z, 260Z, 280Z (S30) Forums
1
05-04-2003 01:26 PM


Thread Tools
Search this Thread
Quick Reply: Diff crossmember bolts


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.