C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Engine vibration ?

Old Dec 27, 2004 | 08:22 AM
  #1  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default Engine vibration ?

I have just completed a rebuild of my 350 and have a big vibration at around 2,500 rpm up. When it is sitting it vibrates and when driving. My mechanic thinks the new pressure plate is out of balance and a friend thinks there is a problem with the new Edelbrock heads.I checked the compresion #2 is 160 psi # 6 is 170psi and all the rest are 180psi

Does any one have some idears?
Reply
Old Dec 27, 2004 | 09:42 AM
  #2  
SanDiegoPaul's Avatar
SanDiegoPaul
Race Director
Supporting Lifetime
 
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Default

Originally Posted by Bangkok Dean
I have just completed a rebuild of my 350 and have a big vibration at around 2,500 rpm up. When it is sitting it vibrates and when driving. My mechanic thinks the new pressure plate is out of balance and a friend thinks there is a problem with the new Edelbrock heads.I checked the compresion #2 is 160 psi # 6 is 170psi and all the rest are 180psi

Does any one have some idears?
Compression variance with new rings is not unheard of, nor is the amount of variance you have bad. Your vibration is either from having the wrong balancer on it for the setup that you have, or from the flywheel/clutch assy.
Reply
Old Dec 28, 2004 | 01:15 AM
  #3  
Bangkok Dean's Avatar
Bangkok Dean
Thread Starter
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Default

I think the problem has been found. after removing the trans ran the motor and she runs smooth. Then saw the pilot shaft end is out of round. So will remove it and send to the machine shop to true up then replace the crank bushing to a smaller hole to fit the newly turned shaft. I will post the results.
Thanks
High and dry in Bangkok
Reply
Old Dec 28, 2004 | 01:22 AM
  #4  
stingr69's Avatar
stingr69
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2004
Posts: 7,493
Likes: 1,502
From: Little Rock AR
Default

Glad to hear you are OK. It sounds like a real tragedy over there.

-Mark.
Reply

Get notified of new replies

To Engine vibration ?



Thread Tools
Search this Thread

All times are GMT -4. The time now is 02:09 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE