Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

pressure plate bolts special?

Thread Tools
 
Search this Thread
 
Old Sep 5, 2014 | 07:09 PM
  #1  
stomis's Avatar
Thread Starter
Teching In
 
Joined: Jan 2014
Posts: 30
Likes: 1
Default pressure plate bolts special?

Can they be substituted with a typical 12.8 Allen cap bolt? I've read one random post stating they have a conical under head that centers the pressure plate. True or false?
Reply
Old Sep 5, 2014 | 09:15 PM
  #2  
gMAG's Avatar
TECH Junkie
20 Year Member
iTrader: (1)
 
Joined: Mar 2003
Posts: 3,033
Likes: 4
From: CT
Default

The following thread is about LT1 pp bolts. However, post #16 shows a photo of The Merv's LS1 pplate. After viewing it, I recalled that the pplate has two holes in it, through which two steel pins come through from the other side, to exactly center the plate. I just reinstalled my engine & trans (LS1), but can't recall the bolt shape.
https://ls1tech.com/forums/lt1-lt4-m...ate-bolts.html
Also, here are some photos of LS1 pplate bolts, even some ARPs.
They appear flat under the head.
https://search.yahoo.com/search;_ylt...yfp-t-421&fp=1
Reply
Old Sep 6, 2014 | 12:15 AM
  #3  
stomis's Avatar
Thread Starter
Teching In
 
Joined: Jan 2014
Posts: 30
Likes: 1
Default

The issue there is that my ram pressure plate does not have alignment pin holes. Therefore I had to remove the dowels. I'm assuming this is caused by my mating a SBC trans to an LS engine. I've read its quite common place to pull the dowels for this exact purpose.

If memory serves me correctly every SBC clutch under the sun has no dowel and plain jane bolts.
Reply
Old Sep 6, 2014 | 11:05 AM
  #4  
gMAG's Avatar
TECH Junkie
20 Year Member
iTrader: (1)
 
Joined: Mar 2003
Posts: 3,033
Likes: 4
From: CT
Default

Originally Posted by stomis
If memory serves me correctly every SBC clutch under the sun has no dowel and plain jane bolts.
I agree.
Can you use an alignment tool, and then just tighten your bolts?
Reply
Old Sep 7, 2014 | 04:40 PM
  #5  
stomis's Avatar
Thread Starter
Teching In
 
Joined: Jan 2014
Posts: 30
Likes: 1
Default

Originally Posted by gMAG
I agree.
Can you use an alignment tool, and then just tighten your bolts?
Thats exactly what I did. The holes have no tolerance to them. Centers the PP no issue. The pressure plate also definitely has no provisions for dowels.
Reply




All times are GMT -5. The time now is 07:15 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE