C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

engine block decked?

Thread Tools
 
Search this Thread
 
Old Sep 23, 2007 | 07:45 PM
  #1  
gccch's Avatar
gccch
Thread Starter
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
Default engine block decked?

Hi all,

I've heard the numbers have sometimes been removed from vette engines through "decking" the block. I realize how this must occur, machining the surface where the head mounts and thus removing the numbers along with it. What I don't know is what are the reasons this is done, and how much material is removed?

Thanks for any insight.

Greg
Reply
Old Sep 23, 2007 | 08:33 PM
  #2  
Durango_Boy's Avatar
Durango_Boy
Team Owner
 
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Default

First off, a good machinist can deck your block and leave the numbers on the pad safe. Even after they are done the part of that pad with the numbers will still be intact.
Reply
Old Sep 23, 2007 | 08:39 PM
  #3  
DARROW's Avatar
DARROW
Racer
10 Year Member
 
Joined: Mar 2006
Posts: 454
Likes: 0
From: SAN CLEMENTE CALIFORNIA
Default

Originally Posted by Durango_boy
First off, a good machinist can deck your block and leave the numbers on the pad safe. Even after they are done the part of that pad with the numbers will still be intact.

How many shops care about leaving the # on the block? If you don't bring it up.
Reply
Old Sep 23, 2007 | 08:46 PM
  #4  
Durango_Boy's Avatar
Durango_Boy
Team Owner
 
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Default

Originally Posted by DARROW
How many shops care about leaving the # on the block? If you don't bring it up.

That's my point though. Most shops are capable so if it's important to keep the numbers then just tell the machinist to spare them.

If it's important enough to you bringing it up should be a no brainer. If those numbers are gone, even if it's an all original car...the value is depreciated.

Just tell them you want the numbers saved and a good machine shop should have no problem doing that.
Reply
Old Sep 23, 2007 | 08:50 PM
  #5  
78Vette-SA's Avatar
78Vette-SA
Le Mans Master
10 Year Member
 
Joined: Feb 2000
Posts: 7,032
Likes: 2
From: Newburgh NY
Default

Originally Posted by Durango_boy
That's my point though. Most shops are capable so if it's important to keep the numbers then just tell the machinist to spare them.

If it's important enough to you bringing it up should be a no brainer. If those numbers are gone, even if it's an all original car...the value is depreciated.

Just tell them you want the numbers saved and a good machine shop should have no problem doing that.


Been there, done that. My machinist has a multi-step process which takes more time but the numbers and brooch marks are not disturbed where it matters.
Reply
Old Sep 23, 2007 | 09:43 PM
  #6  
gccch's Avatar
gccch
Thread Starter
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
Default

Originally Posted by gccch
Hi all,

I've heard the numbers have sometimes been removed from vette engines through "decking" the block. I realize how this must occur, machining the surface where the head mounts and thus removing the numbers along with it. What I don't know is what are the reasons this is done, and how much material is removed?

Thanks for any insight.

Greg
can anyone explain why this is done to begin with?
Reply
Old Sep 23, 2007 | 09:51 PM
  #7  
Jeffery73's Avatar
Jeffery73
Burning Brakes
 
Joined: Jan 2007
Posts: 1,164
Likes: 1
From: Port Clinton Ohio
St. Jude Donor '08-'09-'10-'11-'12-'13
Default

It gives you a nice smooth flat surface to bolt the heads to. Removes any rust or scratches from the block.
Reply
Old Sep 23, 2007 | 09:57 PM
  #8  
gccch's Avatar
gccch
Thread Starter
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2007
Posts: 1,692
Likes: 157
From: Miami, FL
Default

Originally Posted by Jeffery73
It gives you a nice smooth flat surface to bolt the heads to. Removes any rust or scratches from the block.
So there are no performance improvements involved?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Sep 23, 2007 | 11:08 PM
  #9  
Durango_Boy's Avatar
Durango_Boy
Team Owner
 
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Default

Originally Posted by gccch
So there are no performance improvements involved?

It can, in some cases, aid in raising one's compression. You won't get a lot even when paired with a thin head gasket, but it might get you a few tenths of a point of compression.
Reply

Get notified of new replies

To engine block decked?





All times are GMT -4. The time now is 10:58 AM.

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