difference between 806 and 853 heads?

Reply Subscribe

Thread Tools

Search this Thread

Oct 26, 2003 | 11:57 PM

SSEUL8R

Thread Starter

TECH Apprentice

Joined: Aug 2003

Posts: 335

Likes: 0

From: Vacaville, CA

difference between 806 and 853 heads?

Anyone know what the difference is between the heads with 806 casted on them and the ones with 853 casted on them? The board says my 98 should have 853 castings, but there is a big fat 806 casted on it? What does this mean? I couldn't find anything about 806 heads. Thanks guys.

Oct 27, 2003 | 01:39 AM

ZLEEPER

TECH Apprentice

iTrader: (24)

Joined: Nov 2002

Posts: 350

Likes: 0

From: spring, TX

difference

i might be wrong, but i was told that 806 was the casting number used on the 97' ls1 vette heads. maybe your car was assembled with those instead of the 853's.

Oct 27, 2003 | 10:25 AM

Richard@WCCH

Banned

iTrader: (3)

Joined: May 2002

Posts: 1,853

Likes: 5

From: Van Nuys, CA

The 806 heads will have the perimeter valve cover bolt holes and the 853 will have the center bolt valve cover holes. Not much else is different between the two.

Richard

Oct 27, 2003 | 10:28 AM

TVWilkes

TECH Fanatic

Joined: May 2003

Posts: 1,292

Likes: 6

From: RainbowCity,Alabama

There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.

Oct 27, 2003 | 08:48 PM

Tin Indian

TECH Fanatic

Joined: Nov 2001

Posts: 1,975

Likes: 2

From: SW Florida

Quote:

Originally Posted by TVWilkes

There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.

And the #241 were the 99+ center bolt LS1 heads

Oct 27, 2003 | 09:11 PM

Richard@WCCH

Banned

iTrader: (3)

Joined: May 2002

Posts: 1,853

Likes: 5

From: Van Nuys, CA

Quote:

Originally Posted by TVWilkes

There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.

I've seen over 50 sets of each and have never seen a single 853 casting with perimeter bolt holes. If they did make them, I'd like to know about it. There is a casting number 933 that was on the early C5s and is a perimeter bolt head. Could that be what your thinking of?

Thanks,

Richard

Oct 27, 2003 | 11:20 PM

2xLS1

TECH Senior Member

iTrader: (25)

Joined: Nov 2001

Posts: 5,649

Likes: 9

From: Warr Acres, OK

Quote:

Originally Posted by Tin Indian

And the #241 were the 99+ center bolt LS1 heads

My 99 came with 853's, center bolt.

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Brett Foote

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

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

Oct 28, 2003 | 06:17 AM

jrp

SN95 Director

iTrader: (16)

Joined: Jul 2003

Posts: 10,755

Likes: 7

From: Valencia, Ca

Quote:

Originally Posted by Tin Indian

I think your right. The 241 is also a centerbolt. I wonder if the 241s came later than 99?

from my understanding the 241's were the 01-02 heads.

Oct 28, 2003 | 06:20 AM

#10

Brains

TECH Senior Member

iTrader: (7)

Joined: Jan 2002

Posts: 12,754

Likes: 0

From: Katy, TX

Quote:

Originally Posted by Richard@WCCH

If I ship you a set of Stage II ported 853 perimeter bolt heads, will you ship me a set of Stage II ported LS6's in trade? I can get creative with some numbering