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

S10xGN

iTrader: (11)

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.

82cetuner

iTrader: (9)

I thought the reluctor wheel was pressed on? and dosnt have any bolts on it

ramairws6

iTrader: (33)

Reluctor is in the back dude??

ramairws6

iTrader: (33)

Pretty much.......

Unreal

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.

Gray86hatch

iTrader: (83)

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

S10xGN

iTrader: (11)

Technically, the Gen IV cam gear is a reluctor, just a different style than the crank wheel...

jason89i

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.

allan808

iTrader: (3)

Your wrong! Its for Timing, a reluctor is on the crank period!

S10xGN

iTrader: (11)

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.