crank hub
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
Some may have come with weights added to them (check the little holes in the stock damper). Plus, there is a TDC arrow on them that is helpful in determining crank position. Reason enough for me to install it as the factory manual recommends.
I don't think there's any way GM would use a damper as a balancer without a key. Seems it would put the in the liable hot seat in no time. I've always been of the opinion those holes are there to zero balance the damper itself. I dunno... I've never read or heard of anyone claiming their engine was out of balance because they did not put a keyless damper on wrong.
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
I don't think there's any way GM would use a damper as a balancer without a key. Seems it would put the in the liable hot seat in no time. I've always been of the opinion those holes are there to zero balance the damper itself. I dunno... I've never read or heard of anyone claiming their engine was out of balance because they did not put a keyless damper on wrong.
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
FYI / Back on Topic (sort of) I don't think there's any way GM would use a damper as a balancer without a key. Seems it would put the in the liable hot seat in no time. I've always been of the opinion those holes are there to zero balance the damper itself. I dunno... I've never read or heard of anyone claiming their engine was out of balance because they did not put a keyless damper on wrong.
Also MY LT1's dampener / balancer has 'balance' holes drilled in the back of the unit in-between where it bolts to the hub where the serpintine belt rides; again, NOT thru holes, but rather holes which seem to indicate the removal of material simply for balancing the rotating assy.
Also, when I disassembled each motor, both crankshafts did indeed have keyways cut into them, but neither had keys installed, nor did either of the hubs have provisions for keys. The press / interference fit, and the torque on the center bolt (74 ft lbs) was all that was keeping the hub in proper orientation.
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
Also, when I disassembled each motor, both crankshafts did indeed have keyways cut into them, but neither had keys installed, nor did either of the hubs have provisions for keys. The press / interference fit, and the torque on the center bolt (74 ft lbs) was all that was keeping the hub in proper orientation.
I had in my hand an LT1 press on hub (at my engine bulder's location) which was different than my original unit (which I re-used) as it had weight removed from it via holes drilled into the hub inself. Not thru holes, but rather holes in the outside diameter of the piece in front of the front main seal - I thought it was quite odd...
Also MY LT1's dampener / balancer has 'balance' holes drilled in the back of the unit in-between where it bolts to the hub where the serpintine belt rides; again, NOT thru holes, but rather holes which see.
Also MY LT1's dampener / balancer has 'balance' holes drilled in the back of the unit in-between where it bolts to the hub where the serpintine belt rides; again, NOT thru holes, but rather holes which see.
