OHC-6 TECH Over Head Cam projects, questions and advice.

          
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 07-23-2020, 09:07 AM
63 bomb's Avatar
63 bomb 63 bomb is offline
Senior Member
 
Join Date: Mar 2020
Posts: 125
Default Dead Hole

Finally ran a compression test last night and found out that #2 is totally dead... zero compression. The other 5 are all sitting right at 160. So, here is my plan and please feel free to weigh-in.

Step 1: Pull the manifolds so I can see the back side of the valves. Stick a flashlight in the spark plug hole so I can see which valve is not closing. Roll the engine over and compare movement of the valves on #2 with the rest of the cylinders. If one is not closing, go to step 2.

Step 2: Pull the cam cover and see if that valve closes. (Hopefully this is the case) Identify the offending HLA and either replace or re-bleed and try again.

I'm really hoping that it's just an HLA that's pumped up too far and not something more serious. I've already been able to look into the cylinder and am pretty confident that there's not a hole in the piston... the plug was not damaged and the engine has run now for a total of about 40 minutes. If there was a problem with the piston, I should have seen evidence on the plug or in the chamber (I hope). Anyway, please let me know if I'm on the right track.

Thanks again guys!

 


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 01:44 PM.

 

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