Strange engine code - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 02-01-2019, 11:07 AM Thread Starter
 
Join Date: Apr 2011
Location: Glen Ellyn,Il
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Strange engine code

Hi Guys- need some help. I have a 1968 GTO that was built in Fremont. When I purchased the car, the original motor was included in the deal. 9790071 YS. I have that motor on a stand preparing for rebuild. The car came with a running motor in it. Here’s the catch: it’s a block code 9799914 YD. I have the Pontiac casting # book and can’t find that motor. It’s currently got the #16 heads and 4bbl intake from the original motor on it. Is this block a ghost? I’m pretty sure it’s a 70 casting.
Bill E is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 02-01-2019, 12:14 PM
 
BLK69JUDGE's Avatar
 
Join Date: Jun 2010
Posts: 527
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
going from memory

1970
290 hp
4 bolt block
2 bolt caps

good engines .... 1 year casting
BLK69JUDGE is online now  
post #3 of 7 (permalink) Old 02-01-2019, 12:58 PM Thread Starter
 
Join Date: Apr 2011
Location: Glen Ellyn,Il
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I get it that you’re going by memory but I can’t find it anywhere. What makes you sure?
Bill E is offline  
 
post #4 of 7 (permalink) Old 02-01-2019, 01:37 PM
 
Join Date: Jul 2016
Location: North Louisiana
Posts: 568
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
Yeah, a '70 YD is a 290hp 2-barrel 400.

Just type in YD, on the engine code line.

Wallace Racing's Pontiac Engine Search
bigD is online now  
post #5 of 7 (permalink) Old 02-01-2019, 02:11 PM Thread Starter
 
Join Date: Apr 2011
Location: Glen Ellyn,Il
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
After going through the Pontiac casting # book, 9799914 is a 1970 casting. I see a couple RAIII engines in Firebird and GTO with that casting # and 4 bolt main caps. Those are only in California engines which this engine is. ( Z code) I see lots of Grand Prix’s, Tempest, and Catalina’s with that casting # and 2bolt mains.
Bill E is offline  
post #6 of 7 (permalink) Old 02-01-2019, 02:19 PM Thread Starter
 
Join Date: Apr 2011
Location: Glen Ellyn,Il
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If casting # 9799914 was used for 1970 RAIII engines with 4-bolt mains, does that mean all # 9799914 castings are drilled and tapped for 4-bolt mains? This motor might be worth something.
Bill E is offline  
post #7 of 7 (permalink) Old 02-01-2019, 08:06 PM
 
Join Date: Jul 2016
Location: North Louisiana
Posts: 568
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
Lots of Pontiac engines were drilled & tapped for 4-bolt caps, but came with 2-boit caps.

All the '70-'74 455's I built to race were that way.

If you run 2-bolt caps, the webs would be stronger if those extra holes were not drilled.

Some buy 4-bolt caps & have the block line honed or bored.

Some recommend putting bolts in the empty holes, to add a little strength, I suppose. I never had any block problems, at the 400hp/500 torque level.
bigD is online now  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
400 engine, weird pistons, strange object attached to cam! 1970PA4lifelemans 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance 8 08-10-2018 05:42 PM
Strange Noise When Turning Off Engine - Balancer? peabody 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 4 05-21-2014 04:19 PM
Strange '65/66 frame code. Markd15668 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 12 11-06-2011 04:01 PM
Strange noise while braking hard? ftlfirefighter 2004-2006 GTO General Discussion 6 01-27-2006 03:08 PM
Radio Code and Key Code Card Darrin 2004-2006 GTO General Discussion 3 01-06-2005 10:42 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome