Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

tool for ARP flexplate bolts

Thread Tools
 
Search this Thread
 
Old Mar 3, 2010 | 08:51 AM
  #1  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default tool for ARP flexplate bolts

i have a 91 chevy 350 that im trying to use ARP 12pt flexplate bolts on and i cant get a box end wrench or a socket on the bolt to tighten it up. the centering flange on the crank for the flexplate is too close to the bolt. i tried machining down a 3/4 socket to fit in there but it just broke. wtf am i supposed to use?
Reply
Old Mar 3, 2010 | 08:55 AM
  #2  
31camaro's Avatar
Launching!
iTrader: (2)
 
Joined: Sep 2009
Posts: 248
Likes: 0
From: Titusville, Florida
Default

they are 12 point heads
Reply
Old Mar 3, 2010 | 08:58 AM
  #3  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default

i know this....im saying...no socket or wrench will fit on the bolt because the crank flange sticks out too far.
Reply
Old Mar 3, 2010 | 09:00 AM
  #4  
31camaro's Avatar
Launching!
iTrader: (2)
 
Joined: Sep 2009
Posts: 248
Likes: 0
From: Titusville, Florida
Default

i have the same bolts you have, and i tightned them with a short well 12 point standard socket, i cant remeber the size though
Reply
Old Mar 3, 2010 | 12:34 PM
  #5  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default

i used a 3/8 drive 3/4 socket and nothing doin. i couldnt get the side of the socket between the bolt head and the crank flange. this is the only thing keeping me from putting it on the dyno at school...i really hate to use channel locks
Reply
Old Mar 3, 2010 | 02:44 PM
  #6  
mrdragster1970's Avatar
6 & 8 Second Club
 
Joined: Aug 2006
Posts: 2,284
Likes: 0
From: Illinois, RT 66 dragway area
Default

.

WOW, that's weird. I've put a ton of flexplates on, and never had that issue.
I can't believe a standard socket won't work??
Wrench's don't work, but I torque mine down with a socket.
I would definitely use a socket & tap it on or grind/machine it down a little to get it thin enough??
Please do not use channels.

Good luck.


.
Reply
Old Mar 3, 2010 | 02:59 PM
  #7  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default

Originally Posted by mrdragster1970
.

WOW, that's weird. I've put a ton of flexplates on, and never had that issue.
I can't believe a standard socket won't work??
Wrench's don't work, but I torque mine down with a socket.
I would definitely use a socket & tap it on or grind/machine it down a little to get it thin enough??
Please do not use channels.

Good luck.


.
i was kiddint about the c-locks, but i already tried machining down a socket and it just broke when i tried to put any sort of TQ to it. it was a good Snap On socket as well....

im ready to throw them thru ARP's front window and use the stockers. this isint any high HP build, but i just want good quality stuff on it so it lasts as long as the stock engine did...200k.
Reply
Old Mar 3, 2010 | 05:11 PM
  #8  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default

i measured between the apex of the bolt and the crank flange was .055" something doesnt seem right....
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Mar 4, 2010 | 01:55 AM
  #9  
mrdragster1970's Avatar
6 & 8 Second Club
 
Joined: Aug 2006
Posts: 2,284
Likes: 0
From: Illinois, RT 66 dragway area
Default

.

I know, I was screwing around also.

At this point, I would go back to a 6 point. I've used stock bolts on 600-700 HP.

ARP & Mrgasket on anything above that.


.
Reply
Old Mar 4, 2010 | 06:59 AM
  #10  
bww3588's Avatar
Thread Starter
12 Second Club
20 Year Member
iTrader: (49)
 
Joined: Sep 2005
Posts: 8,139
Likes: 10
From: Chillicothe/Lima, Ohio
Default

Originally Posted by mrdragster1970
.

I know, I was screwing around also.

At this point, I would go back to a 6 point. I've used stock bolts on 600-700 HP.

ARP & Mrgasket on anything above that.


.
i think thats what im going to do. its just a pain in the *** when ARP sells you something that hardly does its job. i mean im sure they do their job, but getting it to work is another story.
Reply
Old Mar 4, 2010 | 10:32 AM
  #11  
mrdragster1970's Avatar
6 & 8 Second Club
 
Joined: Aug 2006
Posts: 2,284
Likes: 0
From: Illinois, RT 66 dragway area
Default

.

I've never used a 12 point, so I'm not going to say if it's just too damn tight??
The 6 point is tight, but I personally have never had one that damn tight??
Obviously the biggest head possible will hold better, but geesh, you have to get a tool on the damn thing??

Good luck,


.
Reply




All times are GMT -5. The time now is 12:27 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE