How interchangeable are engine accessories? - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 12-17-2012, 10:50 AM Thread Starter
 
Join Date: Sep 2011
Posts: 32
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How interchangeable are engine accessories?

Hey guys, had kind of a noob question about engine accessories. Im putting a 71 400 (rebuilt) into my 67 Lemans, but I dont have any of the accessories or brackets.

Am I correct in assuming that the accessories should follow the year of the motor, not the body? Or are the years close enough that pretty much everything should be interchangeable?

Ill be posting a WTB thread soon in the Classifieds, so if anyone has any of the aforementioned parts they want to sell, please let me know

Thanks!
Jason
tk421 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 12-17-2012, 11:03 AM
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
The key is making sure that you use components all from the same year. Where things really get messy is when you try to mix years - like, say, a 67 water pump pulley with a 69 crank pulley, and a 71 alternator bracket. Try that and you will expand your vocabulary considerably, and also be well prepared to compete in the "belt flinging" olympics.

One thing that might cross you up if you try to use the 67 pulleys and bracketry on the 71 engine is the water pump. Beginning in 1969, water pumps changed from having 8 mounting bolts to having 11 mounting bolts. In some years part of the alternator bracket mounted to one of the water pump bolts, and if that particular bolt location is "different" between the 8-bolt and the 11-bolt pumps, it could cause a problem if you try to use the 67 bracketry and pulleys. I'm betting GeeTee will know for sure though

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #3 of 5 (permalink) Old 12-17-2012, 06:56 PM
 
jmt455's Avatar
 
Join Date: Mar 2012
Location: SE Michigan
Posts: 725
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
There are two water pump depths, also. Early 1969 cars used a pump with a 4" dimension from the hub face to the mounting surface. Late 1969 through 77 used a deeper pump. Make sure you get the right set of pulleys and spacers for the year/pump style you're using.

If you have A/C, the compressor bracket attachment scheme changed in 69. IIRC, 69 and newer front brackets mount to tapped holes in the heads.

1968 Pontiac GTO
1983 Pontiac Bonneville (G) wagon
2008 Pontiac G8 base

Last edited by jmt455; 12-17-2012 at 06:59 PM. Reason: added details
jmt455 is offline  
 
post #4 of 5 (permalink) Old 12-22-2012, 09:40 PM Thread Starter
 
Join Date: Sep 2011
Posts: 32
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the info guys. Sounds like impending disaster for a new guy like myself
tk421 is offline  
post #5 of 5 (permalink) Old 12-23-2012, 11:28 AM
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
It's not as hard as it sounds. The key is just making sure all the accessories, brackets, and pulleys are from the same model year. (And if that model year is 1969, that they're all either "early production" 69 or "late production" 69. 1969 is when they started out with the short pump, but switched to the long pump in mid-year.)

Bear

BearGFR
Springtown, TEXAS
BearGFR 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
Interchangeable pulleys 68gtohawk8369 1964-1974 Tempest, Lemans & GTO General Discussion 2 11-28-2012 11:24 PM
Interchangeable parts blondie67 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 07-25-2008 12:43 PM
GTO Accessories Warpath 2004-2006 GTO General Discussion 1 12-12-2004 04:26 AM

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