Pontiac - Street No question too basic here!

          
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #11  
Old 08-28-2023, 01:59 AM
lust4speed's Avatar
lust4speed lust4speed is offline
Ultimate Warrior
 
Join Date: Jul 2002
Location: Yucaipa, SoCal
Posts: 8,836
Default

Quote:
Originally Posted by TRADERMIKE 2012 View Post
Mikes Reply:...We performed the degree wheel like this , with the Heads removed we installed the dial indicator over the high portion of the Piston top. We determined the top dead center as the piston came up to its highest point. The number one Piston and the Hydraulic Lifters are on the Base circle so, the Valves are closed on the compression stroke. We have Initial TDC. Attached wire hanger and pointed it over the Degree wheel zero mark.

Turned the motor clockwise, the direction it turns in naturally, and 360 degrees later where at zero again, no slop in that direction. Now we turn CCW for 360 degrees and we end up on 1-1/2 degree advanced at the Crankshaft....
All you confirmed is you have a respectable 1-1/2° slop in your timing chain - nothing more.

Did you arrive at TDC by taking measurements at .050" before and after TDC adjusting your wheel to arrive at true TDC? After you establish true TDC then you need to find the ICL by the same .050" before and after ICL and record the measurements. Then you can finally figure out whether your cam is advanced and by how much.

__________________
Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon.
 


Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 10:35 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017