Crank Pulley Problem
Racer
Joined: Oct 2021
Posts: 324
Likes: 157
From: Maine
I could be wrong but I was under the impression that with a new after market balancer you can just stick it on there. I do recall something about the stock needing to installed in the same position.
One would think it would be keyed if it mattered, I am changing my this spring and was just going to stick it on there.
One would think it would be keyed if it mattered, I am changing my this spring and was just going to stick it on there.
Thread Starter
Cruising
Joined: May 2019
Posts: 14
Likes: 0
LS6 cranks with manual trans do not use keys. Due to my symptoms, I was drawn to the timing chain which is why I removed the pulley but eventually found a broken valve spring. However, thanks to your reply and a quick search I see some dampers are internally balanced. So, thank you. I will look into that.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
Exactly!! I have no idea where these rumors start. The HB balancer is itself a balanced piece. It doesn't matter what orientation it is in, and no LS1 OR LS6 ever came with a keyed crank and balancer from GM.
Le Mans Master
Joined: Feb 2021
Posts: 6,511
Likes: 4,359
From: Florida
2025 Corvette of the Year Finalist - Unmodified
2024 C5 of the Year Winner- Unmodified
2022 C5 of the Year Finalist - Unmodified
No orientation to worry about…well you do need to have it facing the right direction, lol.
Thread Starter
Cruising
Joined: May 2019
Posts: 14
Likes: 0
I go to the shop manual first. Then on to experience if something just doesn't make sense or if I think that there has just got to be a better way!! Which I do find often. And the manual does say to mark crank, balancer MUST be installed to the original position. If replacing balancer, remove existing balance weights and install them on new balancer in the same position.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
Pro
Joined: Aug 2010
Posts: 622
Likes: 169
From: Montgomery Texas
I go to the shop manual first. Then on to experience if something just doesn't make sense or if I think that there has just got to be a better way!! Which I do find often. And the manual does say to mark crank, balancer MUST be installed to the original position. If replacing balancer, remove existing balance weights and install them on new balancer in the same position.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
EDIT:
If you mark the crank,however, it may make things easier for other operations, such as valve spring removal / changes. But, this has nothing to do with the damper.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Cruising
Joined: May 2019
Posts: 14
Likes: 0
I'm working with a Dealer Shop Manual, and I do agree. Every pully that I have ever yanked over 40 years were keyed. Non the less, this crank is just as the book shows. Clean crank, no key, no slot for a key even if I wished it. The pully is clean also, no key slot.
So......are you sayin' just ignore it? Or ask more questions? Just an inquiring mind.
So......are you sayin' just ignore it? Or ask more questions? Just an inquiring mind.
Le Mans Master
Joined: Feb 2021
Posts: 6,511
Likes: 4,359
From: Florida
2025 Corvette of the Year Finalist - Unmodified
2024 C5 of the Year Winner- Unmodified
2022 C5 of the Year Finalist - Unmodified
I'm working with a Dealer Shop Manual, and I do agree. Every pully that I have ever yanked over 40 years were keyed. Non the less, this crank is just as the book shows. Clean crank, no key, no slot for a key even if I wished it. The pully is clean also, no key slot.
So......are you sayin' just ignore it? Or ask more questions? Just an inquiring mind.
So......are you sayin' just ignore it? Or ask more questions? Just an inquiring mind.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
I go to the shop manual first. Then on to experience if something just doesn't make sense or if I think that there has just got to be a better way!! Which I do find often. And the manual does say to mark crank, balancer MUST be installed to the original position. If replacing balancer, remove existing balance weights and install them on new balancer in the same position.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
Why is that? I dodged a huge issue with the broken valve spring. Just wanting to avoid trouble that I can easily avoid.
Administrator
Joined: Mar 2001
Posts: 368,390
Likes: 24,793
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Moved to C5 Tech.