mystery no`s on BBO heads

Old August 20th, 2008, 09:24 PM
  #1  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
mystery no`s on BBO heads

On the intake side of both heads (B heads , 66 toro ) there is the number 2.6 stamped there.Has there been some surfacing work done on these heads wih the number relating to the quantity of metal removed?? I see no similar numbers on the block side of the heads ??
Any thoughts ?
thanks
mike
geckonz08 is offline  
Old August 21st, 2008, 10:30 AM
  #2  
Moderator
 
Redog's Avatar
 
Join Date: Aug 2006
Location: Far Northeast Philadelphia, PA
Posts: 3,119
Casting numbers are usually above the center 2 exhasut ports.

The numbers of "B" heads are 389395. But is there a drill spot too? Without the drill spot they are 45* heads, with the drill spot they are 39* heads. Both are/were 80cc
Redog is offline  
Old August 21st, 2008, 12:48 PM
  #3  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
tx red. No I have that part of the issue you mentioned well under control. The number 2.6 is on the intake side of the head, 1/2 way along the head between the ports --maybe I will see if I can post a pic .I suspect ??? it may relate to some previous mill work --guess only ,thats why I ask.
cheers
mike
geckonz08 is offline  
Old August 21st, 2008, 01:42 PM
  #4  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Originally Posted by geckonz08 View Post
tx red. No I have that part of the issue you mentioned well under control. The number 2.6 is on the intake side of the head, 1/2 way along the head between the ports --maybe I will see if I can post a pic .I suspect ??? it may relate to some previous mill work --guess only ,thats why I ask.
cheers
mike
Are these raised cast numbers or stamped in?
joe_padavano is offline  
Old August 21st, 2008, 04:26 PM
  #5  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
joe,

they are stamped in --on the face of the head which meets the intake manifold
mike
geckonz08 is offline  
Old August 21st, 2008, 06:49 PM
  #6  
Moderator
 
Redog's Avatar
 
Join Date: Aug 2006
Location: Far Northeast Philadelphia, PA
Posts: 3,119
The numbers I told you would be right where the head meets the exhaust manifold.

The only other casting I know of on Olds heads would be the "B" you were talking about already
Redog is offline  
Old August 22nd, 2008, 08:04 AM
  #7  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Originally Posted by geckonz08 View Post
joe,

they are stamped in --on the face of the head which meets the intake manifold
mike
The Chassis Service Manual shows that if oversize lifters were needed (due to production tolerances) when the engine was built, there was a stamping on the head in the location you've indicated.
joe_padavano is offline  
Old August 22nd, 2008, 09:26 AM
  #8  
Just the facts...
 
BILL DEMMER's Avatar
 
Join Date: May 2008
Location: THE GREAT WIDE-OPEN
Posts: 1,251
Originally Posted by joe_padavano View Post
The Chassis Service Manual shows that if oversize lifters were needed (due to production tolerances) when the engine was built, there was a stamping on the head in the location you've indicated.
the chassis manual indicates oversize lifter stamping is on the block's lifter boss.
stamping is pictured as a "O". the presence of an "O" indicates .010" o.s. lifter .



bill
Attached Images
File Type: jpg
IMG0008.JPG (24.4 KB, 322 views)

Last edited by BILL DEMMER; August 22nd, 2008 at 09:36 AM.
BILL DEMMER is offline  
Old August 22nd, 2008, 02:04 PM
  #9  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
Red,Joe,Bill,
Thanks guys .
sometimes an answer raises more questions. However, I will try n get a pic -may have to put carbon black in the stamping no`s to get no`s to stand out.
Seems the oversize lifter thing might be it .
Irrespective, I believe it may be more of a curiosity than a problem.
mike
geckonz08 is offline  
Old August 22nd, 2008, 03:04 PM
  #10  
Old(s) Fart
 
joe_padavano's Avatar
 
Join Date: Mar 2007
Location: Northern VA
Posts: 32,009
Originally Posted by BILL DEMMER View Post
the chassis manual indicates oversize lifter stamping is on the block's lifter boss.
stamping is pictured as a "O". the presence of an "O" indicates .010" o.s. lifter .



bill
Boy, memory is the second thing to go, and i can't remember the first...
joe_padavano is offline  
Old August 23rd, 2008, 12:32 PM
  #11  
Registered User
 
Join Date: Mar 2008
Posts: 3,477
I know about the drill spot on the raised rib near the oil filler tube; haven't seen drill marks on heads. However, B heads will only have 2.06" intake valves (vs. 2.0") if 442 or Toro and both came with 39 degree, .921 lifters.
Run to Rund is offline  
Old August 23rd, 2008, 12:49 PM
  #12  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
hi run to rund ,
the engine in question is 30 mins away . when I get a moment I will have to get a pic. The numbers ,unlike B and the drill spot etc are not visible until the intake manifold is removed.

mike
geckonz08 is offline  
Old August 23rd, 2008, 11:54 PM
  #13  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
Here is a pic of one of the heads showing the position of the stamped no`s 2.6. The numbers are next to the green pen tip . The no`s and position are the same on the other head -
mike
Attached Images
geckonz08 is offline  
Old August 24th, 2008, 12:01 AM
  #14  
Registered User
Thread Starter
 
geckonz08's Avatar
 
Join Date: Apr 2008
Location: new zealand
Posts: 537
maybe this is better
Attached Images
File Type: jpg
100_0622.jpg (76.9 KB, 37 views)
geckonz08 is offline  
Old October 31st, 2009, 09:17 PM
  #15  
Registered User
 
Join Date: Sep 2009
Posts: 9
mystery numbers

I have a set of 1973 Ka 413191 cast and my heads have AX130 in the same place you are talking about so can any one figure that out the lifter size does not make sense for that many letters and numbers
well would likke to know any info
saved2az is offline  
Old November 1st, 2009, 06:03 AM
  #16  
Trying to remember member
 
wmachine's Avatar
 
Join Date: Oct 2005
Location: Ohio
Posts: 4,112
Originally Posted by Redog View Post
But is there a drill spot too? Without the drill spot they are 45* heads, with the drill spot they are 39* heads. Both are/were 80cc
Originally Posted by Run to Rund View Post
I know about the drill spot on the raised rib near the oil filler tube; haven't seen drill marks on heads. However, B heads will only have 2.06" intake valves (vs. 2.0") if 442 or Toro and both came with 39 degree, .921 lifters.
Redog, as Joe says, I think you're getting your info mixed up. The drill points are on the block, not the heads.
wmachine is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
QS442
Parts For Sale
9
August 12th, 2014 05:56 PM
Al2011
Big Blocks
7
August 8th, 2011 01:41 PM
saved2az
Big Blocks
6
November 1st, 2009 11:01 AM
442_rocket
Parts For Sale
1
July 19th, 2008 08:43 PM
GoldOlds
Big Blocks
6
November 16th, 2007 05:56 PM


Thread Tools
Search this Thread
Quick Reply: mystery no`s on BBO heads


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.