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

Engine Pad BB Anomaly? Not Rectangular?

Thread Tools
 
Search this Thread
 
Old Nov 22, 2014 | 11:27 PM
  #1  
steve0415's Avatar
steve0415
Thread Starter
Drifting
Supporting Lifetime
10 Year Member
Community Builder
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 1,681
Likes: 363
From: Boca Raton Florida
Default Engine Pad BB Anomaly? Not Rectangular?

Hi members. I am thinking about buying another 70 LS5 454, and found one that I like. My problem is with the Engine pad, since I have not seen a BB engine pad that was not perfectly rectangular. I have owned two very original 454 cars this year, and both had perfectly rectangular pads.

I have attached a photo and would appreciate any opinions on this pad. I am not 100% sure on the stamping, but the VIN area looked perfect to me, although I'm not sure about the two number 1s in the Date, as mine have all had the 1 looking like the capital letter I.

Could this be a block from a truck, and not a passenger car? Could it be a casting anomaly?

I have also attached a photo of the 72 LS5 that I owned, which was owned by an older woman for 40 years, which I believe is definitely the original block.

Your opinions are appreciated.

Thank you,

Steve
Attached Images   
Reply
Old Nov 23, 2014 | 01:06 AM
  #2  
jr9170's Avatar
jr9170
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2003
Posts: 13,238
Likes: 1,092
From: YANKEES UNIVERSE 70 454-LS5 500 ft-lbs Torque
Default

I have seen many 70 454 engine pads,first one that looks like that.you might be right very well could be an anomaly as I have seen some strange pads on very original Big Blocks before.BTW,want other details on this LS5,colors,options,etc.Some very knowledgeable people here who I am sure will respond.
Reply
Old Nov 23, 2014 | 07:47 AM
  #3  
gbvette62's Avatar
gbvette62
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2000
Posts: 12,681
Likes: 3,134
From: Shamong, NJ
Default

What's the block casting number and casting date? These will tell you more about the block, then the shape of the pad.

I'm having a hard time seeing any broach on that pad. Are they there and just hidden by all of the pitting, or are they missing?
Reply
Old Nov 23, 2014 | 08:38 AM
  #4  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,273
Likes: 4,366
From: Westminster Maryland
Default

Hi Steve,
How did the very top of the last digit of the engine identification stamp get under the front of the head?
Regards,
Alan
Reply
Old Nov 23, 2014 | 09:03 AM
  #5  
kenba's Avatar
kenba
Safety Car
Supporting Lifetime
15 Year Member
Veteran: Army
Liked
Community Favorite
 
Joined: Apr 2007
Posts: 3,849
Likes: 367
From: PHOENIX AZ. WHAT A MAN WON"T SPEND TO GIVE HIS ASS A RIDE
Default

Originally Posted by Alan 71
Hi Steve,
How did the very top of the last digit of the engine identification stamp get under the front of the head?
Regards,
Alan
Build stamp was stamped before the head was installed at Tonawanda.
Reply
Old Nov 23, 2014 | 09:08 AM
  #6  
kenba's Avatar
kenba
Safety Car
Supporting Lifetime
15 Year Member
Veteran: Army
Liked
Community Favorite
 
Joined: Apr 2007
Posts: 3,849
Likes: 367
From: PHOENIX AZ. WHAT A MAN WON"T SPEND TO GIVE HIS ASS A RIDE
Default

There is nothing missing only some of the machine stock left on the water pump pad below. Casting was shifted a little in the machining fixture so not all the extra stock was taken off.
Reply
Old Nov 23, 2014 | 10:09 AM
  #7  
Mike Ward's Avatar
Mike Ward
Race Director
10 Year Member
 
Joined: Jul 2001
Posts: 15,892
Likes: 42
Default

Originally Posted by kenba
There is nothing missing only some of the machine stock left on the water pump pad below. Casting was shifted a little in the machining fixture so not all the extra stock was taken off.
That would be my guess too although the pad surface looks a little wonky. Did someone take steel wool to it?
Reply

Get notified of new replies

To Engine Pad BB Anomaly? Not Rectangular?





All times are GMT -4. The time now is 02:40 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