Crank pulley bolt - sqeeling pig!
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Crank pulley bolt - sqeeling pig! I recently pulled the stock crankshaft pulley and re-installed it. I used a breaker bar with lead pipe extension to tighten down the bolt. Transmission M6 in 2nd gear with parking brake on.
The pulleys are sqeeking like a stuck pig, however.
This happened once before and I re-tighted the crank bolt extra tight and it stoped sqeeking.
Question: How is the best way to tighten the crank pulley bolt? Can you jam a bar in the pulley to stop it from turning?
The pulleys are sqeeking like a stuck pig, however.
This happened once before and I re-tighted the crank bolt extra tight and it stoped sqeeking.
Question: How is the best way to tighten the crank pulley bolt? Can you jam a bar in the pulley to stop it from turning?
Put the e-brake on and put the car in gear (i use 5th). Pull the crank on with old bolt or a longer one and tighten it to 240 ft lbs. Then break that bolt free and get a NEW crank bolt and tighten it to 37lb/ft and then turn it another 140 degrees. You need a new crank bolt, that is prolly your problem.
I just got the arp bolt and torqued it down as much as I could since no one seems to be able to get all of the extra 140 degrees nor the 240lb/ft.
I just got the arp bolt and torqued it down as much as I could since no one seems to be able to get all of the extra 140 degrees nor the 240lb/ft.
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
The hub of the crank bolt has an orange rubber-like substance on it from the factory. Do you think the rubber seal the old bolt is not sufficent to hold the pulley?
I'm using a 24 inch breaker bar with a 18 inch lead pipe.... I don't think I'm any where near 240lbs....
I'll try the new bolt trick - thanks....
I use anti-seize compound on most everything.... Is this a no-no for the crank bolt?
I'm using a 24 inch breaker bar with a 18 inch lead pipe.... I don't think I'm any where near 240lbs....
I'll try the new bolt trick - thanks....
I use anti-seize compound on most everything.... Is this a no-no for the crank bolt?
Originally Posted by robertbartsch
I'll try the new bolt trick - thanks....
The bolts are NOT re-useable.
Many sponsors have them, not 'that' expensive. 7-8 bucks or so. It took me a while to find the longer bolt though, ended up checking out 3-4 different fastener places before finding one.
The new bolt is not a trick. It's what's supposed to be done. What happens with this bolt is that it stretches at a certain torque. That is what the 37ft/lbs then 140 degrees is for. When the bolt is already pre-stretched it won't torque correctly. Anti-seize is a no-no for a crank bolt. You should have used red lock-tite if you were going to use anything (not need though). Anti-seize is a lubricant. It makes it easier to take the bolt back out if you need to. Like spark plugs. Try a new bolt without anti-seize and see how that works. Since the pulley is already on there. There is no need to pull it back on. Just take the old bolt out and put in the new one and torque it 37lb/ft and try and twist an extra 140 degrees past that, or as close to it as you can. This should solve your problem.
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
They are right, the new bolt is mandatory as it is a TTY (torque to yield) bolt and is therefore a one time use item. Some will argue that TTY bolts are only made so that manufacturers can sell more bolts 
but do it the safe way and buy a new bolt asap.
You can use loc-tite on the crank bolt, but I didn't. What I read said blue loctite. I couldn't get mine to 140* past before I maxed out my torque wrench at 250 lb-ft.
but do it the safe way and buy a new bolt asap. You can use loc-tite on the crank bolt, but I didn't. What I read said blue loctite. I couldn't get mine to 140* past before I maxed out my torque wrench at 250 lb-ft.
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I wish I could meet the GM engineer who designed the front crank pulley for the Gen 3.
I think they used a push on pulley to save .15 cents per vehicle.....
...the design sucks and causes people to spend dough on expensive pullers, new bolts, exotic threaded rods, and other rediculous stuff....
Back when Gen 3 were new, there were a few sponsors ----> who advocated using new TTY bolts on "everything" except the crank shaft pulley bolt....
My experience is that the crank bolt has to be EXTRA tight or you will get squeeling....
I'll take your advice and try a new bolt ....
Thanks...
I think they used a push on pulley to save .15 cents per vehicle.....
...the design sucks and causes people to spend dough on expensive pullers, new bolts, exotic threaded rods, and other rediculous stuff....
Back when Gen 3 were new, there were a few sponsors ----> who advocated using new TTY bolts on "everything" except the crank shaft pulley bolt....
My experience is that the crank bolt has to be EXTRA tight or you will get squeeling....
I'll take your advice and try a new bolt ....
Thanks...
Trending Topics
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Exotic threaded rods? lol I got mine reseated with no threaded rod or longer crank bolt. 
Puller goes for $35 at autozone, but it's easier to just rent it for free. Bolts aren't horribly expensive or anything, either.
I hear ya on things being more complicated than need be though!
Puller goes for $35 at autozone, but it's easier to just rent it for free. Bolts aren't horribly expensive or anything, either.
I hear ya on things being more complicated than need be though!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I've seen a few posts about people who ripped their crank shaft threads out trying to replace the pulley with the stock bolt....
I'd rather be inconvienced than chance that problem...
as far as the puller deal goes I have used cheapo pullers with some success but they are a one or two shot deal..... so I bought a decent puller from Martha...
I'd rather be inconvienced than chance that problem...
as far as the puller deal goes I have used cheapo pullers with some success but they are a one or two shot deal..... so I bought a decent puller from Martha...
How about a 4L60E/LS1? How does everybody keep the crank from turning while you tighten the balancer bolt? I don't have my shift linkage/cable hooked up yet. Tried jamming a large screwdriver into the small flywheel access hole up against the flywheel, to no avail. 
Thanks, Gar
Thanks, Gar Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Ive seen these in parts stores and have used them decades ago when I worked in a tranny shop.
Don't pay a bunch for it cause it is just a handle with a spring gizmo to lock onto the flywheel teeth.....
Don't pay a bunch for it cause it is just a handle with a spring gizmo to lock onto the flywheel teeth.....
Is It... That simple handle type tool that you hold onto one flywheel tooth with? I need something that will fit through the small 2 1/2" inspection hole in the bellhousing, that will hold the flywheel somehow. Could I put a strong screw-driver or rod or something through the driveshaft U-joint, to wedge it against the bottom of the car? I wonder if that would work? Or would the transmission just slip? My tranny & converter does'nt have any fluid in it yet. Thanks, Gar
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Originally Posted by Tally TransAm
you can also take off the starter and shove the thickest screwdriver possible into one of the holes in the flexplate and wedge it against the block
works fine and is free
works fine and is free
That's what I did.
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
When you use a looooong breaker bar and lead pipe with an M6 the clutch holds but there is a springness that cushins the pull. It would be easier to apply a ton of tork if the rotating essemply were locked up.....
Trust me, my clutch is fine...
Trust me, my clutch is fine...