2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Help: I can't find an m8x1.75 bolt for my ecu ground.

Thread Tools
 
Search this Thread
 
Old 02-19-15, 11:52 AM
  #1  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Exclamation Help: I can't find an m8x1.75 bolt for my ecu ground.

As the title states, I can't find an m8x1.75 bolt anywhere to redo my ecu ground. (I don't have the original one to clean either, as my ground was relocated by a PO.)

I've been following Aaron Cake's "propper grounding procedure" write up, as my car is not reving properly.

Thank you.
Old 02-19-15, 01:36 PM
  #2  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
I'm thinking that's a misprint/misread because a normal 8mm bolt would be 1.25 pitch.
1.75 would be very coarse.
Old 02-19-15, 01:45 PM
  #3  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
I was hoping so, but I figured that Aaron would have caught it after this post that he replied to.
https://www.rx7club.com/2nd-generati.../bolts-994917/https://www.rx7club.com/2nd-generati.../bolts-994917/
Old 02-20-15, 05:45 AM
  #4  
Rotary Porn Addict

iTrader: (2)
 
Rikk's Avatar
 
Join Date: Jul 2014
Location: Charleston SC
Posts: 299
Likes: 0
Received 0 Likes on 0 Posts
Boogie
If you take a picture of which ground location you are referring to, I will try to find/grab you the correct one
Rikk
Old 02-20-15, 07:15 AM
  #5  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Thank you so much, Rikk! I'll be sure to take and post one immediately after class.
Old 02-20-15, 07:30 AM
  #6  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
If in fact, it is an 8mm bolt (most of the other grounds I recall are 6mm), I bet it's 1.25 pitch. What would be the point of using a super weird bolt just to hold a ground?

I guess we'll find out soon.
Old 02-20-15, 08:29 AM
  #7  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by clokker
If in fact, it is an 8mm bolt (most of the other grounds I recall are 6mm), I bet it's 1.25 pitch. What would be the point of using a super weird bolt just to hold a ground?

I guess we'll find out soon.
Hopefully it is a 1.25! I was wondering that same thing-- my only speculation would be that the finer pitch would cause more surface area to touch, but that's just me hypothesizing/bsing.

Luckily the other grounds were 6x1! I guess Mazda just wanted throw a curveball.
Old 02-20-15, 09:00 AM
  #8  
Engine, Not Motor

iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes on 91 Posts
The bolt is the same M8 x 1.25 bolt as used throughout the car. For example, any of the bolts holding down the intake manifold will fit the hole.

I made a mistake when saying it is 1.75. I will update my writeup and have made a note to do so. Sometimes these things happen.
Old 02-20-15, 09:18 AM
  #9  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
God really is dead.
Old 02-20-15, 10:06 AM
  #10  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Talking

Originally Posted by Aaron Cake
The bolt is the same M8 x 1.25 bolt as used throughout the car. For example, any of the bolts holding down the intake manifold will fit the hole.

I made a mistake when saying it is 1.75. I will update my writeup and have made a note to do so. Sometimes these things happen.
Thank you for the clarification, Aaron! Hahaha, that's a relief.
Old 02-20-15, 10:31 AM
  #11  
Full Member
iTrader: (1)
 
sp0ngebob's Avatar
 
Join Date: Dec 2013
Location: west coast
Posts: 226
Likes: 0
Received 1 Like on 1 Post
did you not even TRY to thread a bolt in before going on a quest to find a mythical m8 x 1.75 bolt?
Old 02-20-15, 10:39 AM
  #12  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
Originally Posted by boogieonfunkyreggae
Hopefully it is a 1.25! I was wondering that same thing-- my only speculation would be that the finer pitch would cause more surface area to touch, but that's just me hypothesizing/bsing.
That would be an excellent hypothesis/theory if that's how metric hardware nomenclature worked...but it's not.
The pitch- in this example, 1.25mm- is the distance between thread crests, so a 1.75 pitch bolt would be coarser, not finer.

Bloody Yurpeons screwed up everything.
Old 02-20-15, 10:43 AM
  #13  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Wink

Originally Posted by sp0ngebob
did you not even TRY to thread a bolt in before going on a quest to find a mythical m8 x 1.75 bolt?
I did but as I said my bolt was missing, which in turn made the threads dirty, causing it to not screw in properly and create the illusion that it could be the wrong pitch. When someone as knowledgeable as Aaroncake says something, you listen.

Thanks for your input as it was absolutely a great contribution... talk about useless posts...

Would an admin please close this thread as the issue has been resolved. Thank you.
Old 02-20-15, 10:46 AM
  #14  
We are what we think
Thread Starter
 
boogieonfunkyreggae's Avatar
 
Join Date: Aug 2012
Location: Kernersville NC
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by clokker
That would be an excellent hypothesis/theory if that's how metric hardware nomenclature worked...but it's not.
The pitch- in this example, 1.25mm- is the distance between thread crests, so a 1.75 pitch bolt would be coarser, not finer.

Bloody Yurpeons screwed up everything.
Ahhh, that makes sense! Well the positive aspect of this speedbump is that I'm now more adept with bolt knowledge!
Old 02-20-15, 03:01 PM
  #15  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
Originally Posted by boogieonfunkyreggae
Ahhh, that makes sense! Well the positive aspect of this speedbump is that I'm now more adept with bolt knowledge!
And there's so much more to learn before becoming an internet pedant such as I and the bane of your friends existence.
Old 02-20-15, 03:22 PM
  #16  
Moderator

iTrader: (3)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,780
Received 2,565 Likes on 1,824 Posts
Originally Posted by clokker
And there's so much more to learn before becoming an internet pedant such as I and the bane of your friends existence.
with a JIS screwdriver!
Old 02-20-15, 11:18 PM
  #17  
Retired Moderator, RIP

iTrader: (142)
 
misterstyx69's Avatar
 
Join Date: Sep 2005
Location: Smiths Falls.(near Ottawa!.Mapquest IT!)
Posts: 25,581
Likes: 0
Received 131 Likes on 114 Posts
Originally Posted by clokker
God really is dead.
..just a stranger on the bus,.,tryin to make his way home...
Old 02-21-15, 10:15 AM
  #18  
Engine, Not Motor

iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes on 91 Posts
I've corrected my website. All is right with the world.
Old 02-21-15, 11:49 AM
  #19  
Cake or Death?

iTrader: (2)
 
clokker's Avatar
 
Join Date: Jan 2007
Location: Mile High
Posts: 10,249
Received 63 Likes on 53 Posts
Yes, the Force is calm again.

Aaron must have regrounded it.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Brice_Brice
2nd Generation Specific (1986-1992)
7
08-18-15 10:42 AM



Quick Reply: Help: I can't find an m8x1.75 bolt for my ecu ground.



All times are GMT -5. The time now is 07:53 AM.