crankshaft damper ,dumb question
Thread Starter
Instructor
Joined: Apr 2006
Posts: 110
Likes: 0
From: wakefield uk
crankshaft damper ,dumb question
Sorry about this ,but whats the difference between internal and externally balanced crankshaft dampers? and is size important.
I need a new one ,the old one is eating its way through the timing cover!
TIA
I need a new one ,the old one is eating its way through the timing cover!
TIA
Racer
Joined: Aug 2006
Posts: 330
Likes: 3
From: Wellington, New Zealand
Externally balanced dampers are only for the 400ci engine, if you have a 350 (odds are) you need the plain damper with no balancing I think the stock size is 7 and 1/4 inch but do check it. If the outer sleeve has slipped that much it is chewing into the timing cover I would not drive the car or even run the engine until you have fixed it!
Intermediate
Joined: Oct 2006
Posts: 29
Likes: 0
From: Midland Texas
right balancer?
I just rebuilt a 78 350 4-bolt main and am dropping it into my 80 model.
I had the L48 in there, but the new engine will have alot more power.. I purchased the original 6-3/4" dampener. Should I go with the l-82 8" model instead?
What are the advantages or benefits or is it necessary?
Eric
I had the L48 in there, but the new engine will have alot more power.. I purchased the original 6-3/4" dampener. Should I go with the l-82 8" model instead?
What are the advantages or benefits or is it necessary?
Eric
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
The smaller dampener will work. Larger diameter is better at dampening, but there is no balance or other problem by sticking to the smaller one. I always highly recommend you either get a GM dampener or a quality aftermarket such as ATI. Under no circumstances should you use a parts-store replacement. These are Chinese and are known to blow apart causing much damage.
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Originally Posted by zwede
The smaller dampener will work. Larger diameter is better at dampening, but there is no balance or other problem by sticking to the smaller one. I always highly recommend you either get a GM dampener or a quality aftermarket such as ATI. Under no circumstances should you use a parts-store replacement. These are Chinese and are known to blow apart causing much damage.
and you might have a dang time getting the Chinese models to fit properly. Ask how I know.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Originally Posted by VCuomo
Quote: "Externally balanced dampers are only for the 400ci engine"
I don't think that's entirely true - I have a 350 that's been stroked to a 383 and it uses an 8" externally balanced dampner.
I don't think that's entirely true - I have a 350 that's been stroked to a 383 and it uses an 8" externally balanced dampner.
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
Team Owner
Joined: Nov 1999
Posts: 26,679
Likes: 17
From: This vette goes to 11 Milford MA
St. Jude Donor '03-'05
Originally Posted by turbovette80
got my 6 3/4" damper in the post today, whats the procedure when refitting ,any tips or tricks or is it a straight forward job? I've heard about an installation tool.
thanks pvc
thanks pvc
You definitely need a puller/installer tool. DO NOT hammer it on.
While its off, replace the front main seal.
Racer
Joined: Aug 2006
Posts: 330
Likes: 3
From: Wellington, New Zealand
Good advice above! A puller will not cost a great deal and will no doubt come in handy at a later stage. It's a little painfull bending over the fender to get access but it is a fairly straight forward job.
Heel & Toe
Joined: Nov 2005
Posts: 19
Likes: 0
From: Pflugerville Texas
Had the same happen to mine this spring.. while I was replacing the damper I pulled the timing cover to make sure it was not damaged by the damper. So I also put a new timing chain set on it and one of the one piece oil pan gaskets and an oil pump. I also replaced the belts and hoses too.
You can "rent" a puller installer from autozone.
You can "rent" a puller installer from autozone.
Thread Starter
Instructor
Joined: Apr 2006
Posts: 110
Likes: 0
From: wakefield uk
Thanks for the help guys ,got to find me a puller /installer in the UK now
BTW my new damper was made in Mexico should I be worried?
BTW my new damper was made in Mexico should I be worried?
Last edited by turbovette80; Oct 12, 2006 at 04:20 PM.
