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

Root cause of broken starter mount on block?

Thread Tools
 
Search this Thread
 
Old Sep 6, 2012 | 11:05 AM
  #1  
Cobra4B's Avatar
Thread Starter
TECH Fanatic
iTrader: (9)
 
Joined: Dec 2006
Posts: 1,240
Likes: 0
From: Va Beach
Default Root cause of broken starter mount on block?

Is this due to a poor original design (short bolt/long bolt) where the short bolt inner side can't handle the load over time and breaks? Then puts all the load on the outer bolt which breaks the mount tab.

Or, is it caused by hydrolock type situations or a loose inner bolt etc?

I'm about to tear the heads off my LS6 for a lifter swap and am wondering if I should buy the newer starter that uses 2 long bolts.

If the design is the cause then preemptively buying the updated starter makes sense. If the breakage is just a symptom of something like hydrolock or improper install then there's no point.

Thoughts?
Reply
Old Sep 6, 2012 | 01:19 PM
  #2  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

get a MSD starter and be done
Reply
Old Sep 6, 2012 | 01:29 PM
  #3  
Cobra4B's Avatar
Thread Starter
TECH Fanatic
iTrader: (9)
 
Joined: Dec 2006
Posts: 1,240
Likes: 0
From: Va Beach
Default

Why bother... I can get the newer style OEM one on eBay for $80. Curious if anyone has broken the old design spontaneously or if it's generally related to a hydrolock type incident. Most of what I read online always gets back to hydrolock or something preventing the engine from turning over.
Reply
Old Sep 6, 2012 | 01:47 PM
  #4  
slammedc5's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Jan 2012
Posts: 349
Likes: 0
From: Hawaii
Default

Yes. I would get the newer style with the longer bolt. There's got to be a reason why GM changed this. They did this to the trucks as well.
I know a few people who have broke the ear off their block. Now that really sucks. A couple guys did have a leaking head gaskets and leaked around the starter area. I can't see how it can cause the problem though. Maybe just a coincedence. But the guys that swapped to the new design starter, have had no issues. I'm going to change mine out soon also. The start itself is awesome, no need for aftermarket. The vette starter never gets heat soaked, even with headers and other mods. Starts the car right up. And lasts over 100,000 miles.
Reply
Old Sep 6, 2012 | 08:16 PM
  #5  
SweetS10V8's Avatar
12 Second Club
iTrader: (4)
 
Joined: Jun 2004
Posts: 2,580
Likes: 3
From: Michigan
Default

Broke 3-4 on the dyno. Always was bolt loosening....
Reply
Old Sep 6, 2012 | 08:34 PM
  #6  
Cobra4B's Avatar
Thread Starter
TECH Fanatic
iTrader: (9)
 
Joined: Dec 2006
Posts: 1,240
Likes: 0
From: Va Beach
Default

So if one were to check them periodically and install them with blue loctite it should remove the issue. I.e. the breakage is not due to a poor design, but due to hydrolock type situations and/or improper installation.
Reply
Old Sep 7, 2012 | 10:03 PM
  #7  
SweetS10V8's Avatar
12 Second Club
iTrader: (4)
 
Joined: Jun 2004
Posts: 2,580
Likes: 3
From: Michigan
Default

Id use red loctite. Never had a problem breaking it loose, just never use green...haha.
Reply
Old Sep 8, 2012 | 01:19 PM
  #8  
King Nothing's Avatar
TECH Veteran
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (9)
 
Joined: Oct 2005
Posts: 4,768
Likes: 26
From: Central Valley
Default

Originally Posted by Cobra4B
Is this due to a poor original design (short bolt/long bolt) where the short bolt inner side can't handle the load over time and breaks? Then puts all the load on the outer bolt which breaks the mount tab.

Or, is it caused by hydrolock type situations or a loose inner bolt etc?

I'm about to tear the heads off my LS6 for a lifter swap and am wondering if I should buy the newer starter that uses 2 long bolts.

If the design is the cause then preemptively buying the updated starter makes sense. If the breakage is just a symptom of something like hydrolock or improper install then there's no point.

Thoughts?
my bolts lasted 165k before being ripped off due to the torque of trying to start the engine with a hydrolocked engine . . . didn't know it was hydrolocked until oil was dripping out of the passenger side of the block lol a MSD starter isn't the answer (seriously that guy was kidding right? lol) and longer bolts aren't the answer. when you take off the bolts for your starter inspect them and clean them out and if you can clean out the hole too then reinstall and don't over torque them, if you do you'll stretch the bolt and can make it weak or break it
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jan 9, 2013 | 08:45 PM
  #9  
midnight blue z28's Avatar
Registered User
 
Joined: Oct 2012
Posts: 16
Likes: 0
From: Burnsville N.C.
Default

The same thing just happened to my 2000 z28. First my machanic said my motor was frozen up. So I decided to look myself. Tha starter was hahging there, so we removed it and could now turn the motor over by hand.Hydrolocked by chance ?1 other thing when we tried to push start the car the rear tires arent moving even with a 4th gear push.I have the new starter just waitting on ordering the bracket for 400 hundred. Any help would be appreciated
Reply
Old Jan 9, 2013 | 08:58 PM
  #10  
badazz81z28's Avatar
TECH Addict
15 Year Member
iTrader: (6)
 
Joined: Sep 2005
Posts: 2,391
Likes: 3
Default

From my research, it not from the bolt loosening, its from stress on the small tab of aluminum on the starter. When fatigue sets in and it breaks the tab, the starter rotates and bust out the long bolt side. Every picture I have seen shows the small bolt tab broken off. Loctite will not prevent this. Get the dual long bolt starter from Rock-Auto. Get new AC Delco bolts while youre at it.
Reply
Old Jan 9, 2013 | 10:58 PM
  #11  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

the MSD starter uses 2 long bolts...........and its really nice
Reply
Old Mar 26, 2013 | 11:10 AM
  #12  
omar2guy's Avatar
Teching In
 
Joined: Feb 2012
Posts: 49
Likes: 0
From: Pearland Tx
Default

Any pics if the bracket installed, u r talking about the starter bridge bracket 2ndsucksracing.com sells?
Reply




All times are GMT -5. The time now is 09:58 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