Cam removal - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 02-23-2012, 06:13 PM Thread Starter
 
Join Date: Dec 2011
Location: Logan, Ut
Posts: 113
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cam removal

I have a 1967 400 that I have just torn down but can't seem to get the cam to come out. I have torn down several general motors engines in the past and the cam always came out the front without too much trouble. I have a 10" long fine thread bolt I screwed in the front end to balance the cam on its way out but it just won't come out. Anyone else had this problem in the past? The cam will rotate just fine but seems to be stuck at the back of the block. The front plate has been removed and all of the lifters are out.
orelog is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 02-23-2012, 06:42 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,470
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Is the distributor out? Try turning the cam as you push in and pull out. Probably a little varnish on one of the journals, forming a small ridge. At least you know your cam bearings are probably ok!!
geeteeohguy is online now  
post #3 of 8 (permalink) Old 02-23-2012, 07:33 PM
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,731
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Garage
What he said... Lift the distributor up if you haven't already. Be sure you remove the cap first and mark where the rotor's pointing so you can reinstall it in exactly the same position.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
 
post #4 of 8 (permalink) Old 02-23-2012, 08:10 PM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
with the dist out

Quote:
Originally Posted by orelog View Post
the cam on its way out but it just won't come out. Anyone else had this problem in the past? The cam will rotate just fine but seems to be stuck at the back of the block. The front plate has been removed and all of the lifters are out.
If the cam comes out at all and you can see any of the cam lobes on the outside of the engine, then keep turning the cam as you pull, it should come out. Sometimes when the cam bearings get wore badly they will get concaved in the center of the bearing making removal difficult. You may be able to reach in through the top of the lifter valley and use a pry bar or large screw driver to help pry it out as you turn from the front.
Rukee is offline  
post #5 of 8 (permalink) Old 02-23-2012, 08:16 PM Thread Starter
 
Join Date: Dec 2011
Location: Logan, Ut
Posts: 113
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The motor is empty except the cam. Just a bare block with the cam stuck in it. I think a lot of twisting and pulling will be tried tomorrow and I will report back. Thanks for the advice.
orelog is offline  
post #6 of 8 (permalink) Old 02-23-2012, 08:29 PM
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,731
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Garage
Alrighty then - unless there's something badly broken inside, it's probably just tight cam bearings. Try liberal application of some lube and twist/pull. You could put the cam gear back on for some additional leverage. The only other possibility that comes to mind is, if you have it on an engine stand and it's upside down, at some point in the past someone may have ground the retaining 'ears' off the bottom part of the oil pump drive shaft (so they could install it from the top after they discovered they'd left it out) and it has gotten "up" into the cam and gotten wedged. You should be able to see that problem through the distributor hole, though.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #7 of 8 (permalink) Old 02-23-2012, 08:36 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,470
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Bear, that's a really good point that I didn't think of...and I should have, since the shaft in my ragtop has no ears on it....a definite thing to check if the block is inverted. Some carb cleaner on the journals may brake up any varnish, and the idea of installing the gear and using a couple of ladyfoots or screwdrivers to press it out is a good one, too. If worse comes to worse, you can remove the rear freeze plug and use a drift to drive it out....but we hate using force on this type of thing!
geeteeohguy is online now  
post #8 of 8 (permalink) Old 02-24-2012, 05:59 PM Thread Starter
 
Join Date: Dec 2011
Location: Logan, Ut
Posts: 113
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
OK, I got it out!! I had to build a slide hammer to use on the front end then after a lot of hammering and rotating it moved out of the rear bearing. That wasn't the end of the problem. It was real tight coming out of each bearing. For the last two I knocked out the rear plug and beat it out with a 1" steel rod inserted from the back of the block. The cam bearings were really chewed up and the babbit was flaking off. It looked like the oil holes in the cam bearings were not lined up with the holes in the block. Some fun, NOT.
orelog 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
Convert Top Removal Bobbyg 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 1 02-22-2010 05:15 PM
A4 removal procedure? fighting river gto Drive train, suspension, alignment and brakes. 4 11-26-2009 04:24 PM
Visor removal Q. kodeprissy72 Interior Discussions 0 03-20-2008 08:31 PM
Tar Removal ALTEREGO The Lounge 4 08-25-2005 08:52 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