C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

identify heads

Thread Tools
 
Search this Thread
 
Old Apr 2, 2010 | 08:34 AM
  #1  
Blow Torch's Avatar
Blow Torch
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Default identify heads

How can you identify which heads are on a car (specifically if 243 heads) if the #s have been removed from the pads at the end of the heads?
As I had posted in the past, when my wife's LS1 car dyno'd unexpectedly high, we looked at the heads to see which heads it had, and all the #s had been ground off the pads (you could see the grinding marks)
Is there some #s under the valve cover to identify the heads?
Reply
Old Apr 2, 2010 | 09:10 AM
  #2  
Uncle John's Avatar
Uncle John
Pro
 
Joined: Oct 2005
Posts: 738
Likes: 2
From: Richmond VA
Default

The only thing I can think of is that you would have "D" shaped exhaust ports as opposed to round ones on the 853 and 241 heads.
Reply
Old Apr 2, 2010 | 09:27 AM
  #3  
Blow Torch's Avatar
Blow Torch
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Default

hmmm; So the 243 heads have D shaped exhaust ports?
I can't believe i hadn't heard that before But then I guess I've never really seen any Z06 heads before.
Reply
Old Apr 2, 2010 | 11:12 PM
  #4  
VET-005's Avatar
VET-005
Racer
15 Year Member
 
Joined: Dec 2006
Posts: 343
Likes: 1
From: LasVegas Nevada and NSW Aust
Default

There are casting numbers under the valve covers that can clearly be seen. Valve cover easier to remove than pulling off the exhaust manifold.
Reply
Old Apr 2, 2010 | 11:26 PM
  #5  
Blow Torch's Avatar
Blow Torch
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Default

Originally Posted by VET-005
There are casting numbers under the valve covers that can clearly be seen. Valve cover easier to remove than pulling off the exhaust manifold.
Thanks; That's what I was hoping for.
Is the same three digit #s as on the pads?
Reply
Old Apr 3, 2010 | 12:52 AM
  #6  
KCvetteowner's Avatar
KCvetteowner
Melting Slicks
10 Year Member
 
Joined: Aug 2000
Posts: 2,618
Likes: 5
From: Overland Park KS
Default

Originally Posted by Blow Torch
Thanks; That's what I was hoping for.
Is the same three digit #s as on the pads?
should be two sets of 4 digit numbers cast in the top of the head. My LS6 heads had 1256 4243
Reply

Get notified of new replies

To identify heads





All times are GMT -4. The time now is 02:03 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE