69 GTO 400 distributor gear end play - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 04-03-2019, 08:52 PM Thread Starter
 
Join Date: Mar 2015
Posts: 250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
69 GTO 400 distributor gear end play

I'm rebuilding the distributor for My 69. How much end play should these distributors have? I have set my Chevrolet distributors at around .020 endplay with good results. This is my first Pontiac distributor. Also,. The Chevy's have a three tanged washer between the bottom of the distributor housing and the gear. The tangs face upward and engage in the bottom of the distributor housing. Are the Pontiacs supposed to have these as well? None of my Pontiacs have one? Thank you.
greenjudge69 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 04-04-2019, 11:25 AM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,457
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Haven't seen the tangs on Pontiac distributors. .020"--.060" will be fine on the end-play. As you know, the reference dot on the gear is there so you can install the gear back in the right clocked position.
geeteeohguy is offline  
post #3 of 4 (permalink) Old 04-04-2019, 07:26 PM
 
Lemans guy's Avatar
 
Join Date: Oct 2014
Location: Nashville, Tennessee
Posts: 669
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Green.....Geeteeohh guy is right!...I always say that....the Pontiacs do not have the three prongs, the end play of 020 to 060 will be great...

The GM speck is even broader, 010 to .100 as I recall. When they get up high they get sloppy. Had a friends 64 Corvette that would not let the idle stay put. It hunted from 800 to 1000 Rpmís. Pulled the distributor and checked the clearance up near .100. Shimmed it down to .015 and the idle became rock solid.

Use hardened steel shims amoroso sells them in a small pack, do not use just any washer.

The small indent that geeteeoooh guy mentioned is supposed to index with the tip of the rotor. Before I take the gear off I always put a white dot on that indent just as an extra check to make sure I donít forget it. It is black and barely noticeable, and have seen many put on wrong, as even the best of us can forget things when moving fast.

Shim it if the end play is too much.
Lemans guy is offline  
 
post #4 of 4 (permalink) Old 04-04-2019, 09:10 PM Thread Starter
 
Join Date: Mar 2015
Posts: 250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Great,. Thanks Guys. Appreciate your assistance.
greenjudge69 is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

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
66 GTO Distributor end play tonyli 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 4 11-10-2015 06:30 PM
Distributor gear change WhittP 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 08-01-2014 09:16 AM
400 rebuild distributor orientation SPCMarty 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion 11 08-17-2012 07:25 PM
Distributor gear 70gto 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 05-02-2008 11:54 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