Engine identification - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-12-2014, 05:22 PM Thread Starter
pjk
 
Join Date: Jan 2014
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Engine identification

Looking for some help in identifying the engine in my newly purchased 67 GTO. The numbers on the block are 278436 with a YS right underneath them. I do believe this is a YS code engine with 335 horsepower. But how do I know if it is original to the car and if not what year would the engine be? Thanks in advance for any help given.
pjk is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 01-12-2014, 09:24 PM
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,742
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Garage
Google up "Pontiac engine codes" and you should get several hits with reference information, including photos/diagrams. You'll want to start with the date code near the distributor to figure out what year the engine is, then use the casting code (low, down behind the passenger side head), and finally the YS. "YS" and the other codes like it were used in multiple years and sometimes meant different things depending on the year. That's why you always begin with the date code.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #3 of 3 (permalink) Old 01-13-2014, 11:40 AM Thread Starter
pjk
 
Join Date: Jan 2014
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the help Bear, I will look for those numbers.
pjk is offline  
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
Engine Block Identification Spanky64 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 3 10-03-2011 07:27 PM
69 GTO engine identification help......... Eshack80 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 4 12-14-2010 04:08 PM
Engine Block Identification HenryJ63 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 1 01-14-2010 08:06 AM
Engine/Tranny Identification Help please Fred007 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 4 04-15-2009 09:25 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