Timing marks - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 02-13-2012, 12:00 PM Thread Starter
 
66goatframeoff's Avatar
 
Join Date: Nov 2011
Location: Brandon FLA
Posts: 120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Timing marks

So being an ol fart and trying to remember timing chain marks have searched the threads and now more confused than ever I have always set cam at 6 and crank at 12 however my 400 was put togeter 4 years ago and run once so Idecided to put new rear main in while it was out when I bring #1 up comp stroke bal points to 0 and marks are at 12-12 does anyone have a picture of the correct timing marks for a 70-400 my book so old pages for eng o/haul unreadable heeelp..
66goatframeoff is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 02-13-2012, 12:08 PM
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,070
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Garage
Actually, it doesn't matter - both orientations are correct. Remember that the crank makes two revolutions for every one revolution of the cam, so if you install the chain with the marks "one way" and then spin the crank over exactly one revolution, it's going to be "the other way". What matters is making sure that at TDC on the crank, the marks line up with each other. Then when you get around to installing the distributor, the rotor is pointed at #1 cylinder whenever #1 cylinder is near TDC on the compression stroke --- and I too forget whether TDC compression is with the cam timing mark "up" or "down". I just turn it over by hand and watch the rockers on #1 and the timing marks. When I see the intake valve close, I know that when the crank next says TDC #1, that's compression.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #3 of 3 (permalink) Old 02-13-2012, 12:48 PM
 
facn8me's Avatar
 
Join Date: Jul 2011
Location: Tulsa, Ok
Posts: 574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yep, just crank it around one more revolution at the crank and the dots will be lined up.

http://www.gtoforum.com/signaturepics/sigpic18842_1.gif

1966 Pontiac Lemans Convertible
389 tri power
facn8me 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
These damn water marks! pushin400 Exterior Discussions 10 07-19-2011 01:08 PM
Timing Covers and Timing Pointers ride400 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 8 11-24-2009 09:11 PM
Where are the timing marks on 455 HO? clarkaim 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 06-19-2009 07:20 PM
What do YOUR skid marks look like? WanaGTO Drive train, suspension, alignment and brakes. 10 02-05-2009 09:14 PM
Swirl Marks in Paint ? lotaguts Exterior Discussions 8 02-24-2006 03:23 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