Generation IV External Engine LS2 | LS3 | LS7 | L92 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

reluctor wheel bolts backed out?!?

Thread Tools
 
Search this Thread
 
Old Jul 24, 2013 | 10:09 PM
  #1  
jason89i's Avatar
Thread Starter
Teching In
 
Joined: Oct 2011
Posts: 7
Likes: 0
Default reluctor wheel bolts backed out?!?

my buddies ls2 motor started to throw a timing sensor code. we pulled the cam sensor to find the end had made slight contact with the reluctor wheel. we shimmed the new sensor. two days later (on the track) the car died. after getting it back to the shop, he pulled the front cover to find all the reluctor wheel bolts had backed out. (also noticed the main crank pulley bolt was loose.) metal shavings and granade pieces everywhere. motor is toast.

any thoughts as to how this happened? what would cause the reluctor wheel bolts to back out?

internally stock ls2 engine.

i have the same ls2 motor in my track rat....as in road race. what should i tear apart and replace as preventative? what should be inspected?


thanks, Jason
Reply
Old Jul 25, 2013 | 07:18 PM
  #2  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Originally Posted by jason89i
my buddies ls2 motor started to throw a timing sensor code. we pulled the cam sensor to find the end had made slight contact with the reluctor wheel. we shimmed the new sensor. two days later (on the track) the car died. after getting it back to the shop, he pulled the front cover to find all the reluctor wheel bolts had backed out. (also noticed the main crank pulley bolt was loose.) metal shavings and granade pieces everywhere. motor is toast.

any thoughts as to how this happened? what would cause the reluctor wheel bolts to back out?

internally stock ls2 engine.

i have the same ls2 motor in my track rat....as in road race. what should i tear apart and replace as preventative? what should be inspected?


thanks, Jason
Internally stock...meaning it's never been into? No cam change? Cause it sounds like improper bolt torque and/or lack of Locktite on the threads.
Reply
Old Jul 25, 2013 | 08:29 PM
  #3  
82cetuner's Avatar
10 Second Club
iTrader: (9)
 
Joined: Sep 2009
Posts: 1,368
Likes: 7
From: Denham Springs, LA
Default

I thought the reluctor wheel was pressed on? and dosnt have any bolts on it
Reply
Old Jul 25, 2013 | 08:38 PM
  #4  
ramairws6's Avatar
9 Second Club
20 Year Member
Photogenic
Photoriffic
iTrader: (33)
 
Joined: Sep 2004
Posts: 2,013
Likes: 85
From: Hicksville MN!
Default

Originally Posted by jason89i
my buddies ls2 motor started to throw a timing sensor code. we pulled the cam sensor to find the end had made slight contact with the reluctor wheel. we shimmed the new sensor. two days later (on the track) the car died. after getting it back to the shop, he pulled the front cover to find all the reluctor wheel bolts had backed out. (also noticed the main crank pulley bolt was loose.) metal shavings and granade pieces everywhere. motor is toast.

any thoughts as to how this happened? what would cause the reluctor wheel bolts to back out?

internally stock ls2 engine.

i have the same ls2 motor in my track rat....as in road race. what should i tear apart and replace as preventative? what should be inspected?


thanks, Jason
Reluctor is in the back dude??
Reply
Old Jul 25, 2013 | 08:38 PM
  #5  
ramairws6's Avatar
9 Second Club
20 Year Member
Photogenic
Photoriffic
iTrader: (33)
 
Joined: Sep 2004
Posts: 2,013
Likes: 85
From: Hicksville MN!
Default

Originally Posted by 82cetuner
I thought the reluctor wheel was pressed on? and dosnt have any bolts on it
Pretty much.......
Reply
Old Jul 26, 2013 | 09:40 AM
  #6  
Unreal's Avatar
TECH Apprentice
 
Joined: Jan 2002
Posts: 366
Likes: 0
From: Gilbert, AZ
Default

He is talking about the cam sprocket, not the reluctor wheel on the crank. I've seen this happen before. This is why any cam I do ARP cam bolts with red Loctite and double check the torque.
Reply
Old Jul 26, 2013 | 03:43 PM
  #7  
Gray86hatch's Avatar
TECH Addict
15 Year Member
iTrader: (83)
 
Joined: Sep 2009
Posts: 2,388
Likes: 4
From: Battle Creek Mi
Default

Having a bad balancer can shake them out. Even a underdrive in some situations can cause this.

I red locktite and use the comp cams locking plate along with 26ftlb.

Tim
Reply
Old Jul 26, 2013 | 08:47 PM
  #8  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Technically, the Gen IV cam gear is a reluctor, just a different style than the crank wheel...
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 Jul 27, 2013 | 12:49 AM
  #9  
jason89i's Avatar
Thread Starter
Teching In
 
Joined: Oct 2011
Posts: 7
Likes: 0
Default

no cam. motor had never been cracked open to our knowledge. just underpulley, headers, tune.


sorry for the confusion.
cam gear, just behind the front cover.

bolts backed out, causing cam gear (with reluctor type timing ridges) to hit the position sensor. ultimately all 3 bolts backed out, bounced around the motor. cam bear spun causing contact on multiple valves.

i have the same (24k mile) ls2 motor. again, underdrive pulley, light flywheel, headers and tune.
Reply
Old Jul 29, 2013 | 07:47 PM
  #10  
allan808's Avatar
TECH Apprentice
iTrader: (3)
 
Joined: Sep 2009
Posts: 388
Likes: 0
Default

Originally Posted by S10xGN
Technically, the Gen IV cam gear is a reluctor, just a different style than the crank wheel...
Your wrong! Its for Timing, a reluctor is on the crank period!
Reply
Old Jul 29, 2013 | 08:45 PM
  #11  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Originally Posted by allan808
Your wrong! Its for Timing, a reluctor is on the crank period!
Ya know? I hate to call anybody an IDIOT, but a reluctor is anything that interrupts a magnetic field to generate a pulse. Doesn't matter if it's on a crank, distributor, cam gear, rear view mirror, or a monkey's *** cheek.
Reply




All times are GMT -5. The time now is 03:05 AM.

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