Rocker arm canting to side - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 09-30-2010, 10:03 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rocker arm canting to side

I have a Chevy 350 that I discovered the #5 intake rocker had canted off of the spring and was just sitting there. I removed it and discovered that the rocker had nicked into the side of the stud. I pulled the stud, tapped the hole, installed a new stud and reinstalled the rocker.

I set to TDC #1, then manually turned the engine over through each cyl until #5 was done and then set the lash. I cranked the engine and that rocker immediately pops off. I reset it again, turned on and it popped off. I did this about 4 more times and no matter how I adjust it, it just pops off to the side. What the heck is doing this?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-30-2010, 10:12 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,874
Wiki Edits: 0

Thanks: 53
Thanked 623 Times in 553 Posts
Did you check the pushrod to see if it is bent??
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-30-2010, 10:33 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I did the first time i saw it off but not after. I will check it again tomorrow.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-30-2010, 10:42 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,874
Wiki Edits: 0

Thanks: 53
Thanked 623 Times in 553 Posts
How are the rockers guided?? Self guiding?? Pushrod guided by pushrod slot in the head or guideplate??

The rocker may be worn inn the ball area enough to ruin it. Also check the rocker closely for cracks in the ball pivot area and pushrod cup area.

Something is wrong, it doesn't just happen for no reason.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-30-2010, 10:48 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,321
Wiki Edits: 326

Thanks: 839
Thanked 1,153 Times in 952 Posts
Mechanical interference somewhere.
1. piston to valve
2. spring coil bind
3. retainer to guide
4. rocker slot to stud
Is the pushrod centered in the lifter or is it sitting up on the ledge of the lifter, out of the cup? Peer down there with a strong light.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-30-2010, 11:11 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Be sure you don't have a self aligning rocker on a head made for non self aligning rocker arms. Those heads have close tolerance pushrod slots and using self aligning rockers on them can put the pushrod in a bind and cause a misalignment like you describe.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-01-2010, 06:32 AM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The lots for the rod on the head are not big. Is there a part number I can find to tell and where do I look?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-01-2010, 07:23 AM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The rockers like stock type rockers but with a roller.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-01-2010, 07:25 AM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,874
Wiki Edits: 0

Thanks: 53
Thanked 623 Times in 553 Posts
What is the head casting #?? Under the valve cover, between the 1st pair and second pair of valvesprings, or between the 3rd pair and 4th pair.

Where the pushrod comes through the head, is it a round hole 1/8" or so bigger than the pushrod, or a slot that is only as wide as the pushrod diameter??

Do the rockers arms have self aligning "ribs" on each side of the valvestem tip??
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-01-2010, 09:25 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
A photo of the p-rod slot area of the head would help, too- there's no telling if the slots were opened up for using larger diameter p-rods or for use w/SA rockers. Or if the heads are for use w/SA rockers in the first place.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 10-01-2010, 03:33 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Here are the pics, not the best but as good as I could do for now. There is not much room on the sides. The holes are round on top and straight on the sides.

The casting number the best I could tell are B2441 14014416.
Attached Thumbnails
Click image for larger version

Name:	photo (2).JPG
Views:	105
Size:	313.9 KB
ID:	48568   Click image for larger version

Name:	photo.JPG
Views:	95
Size:	309.7 KB
ID:	48569   Click image for larger version

Name:	photo(3).JPG
Views:	108
Size:	359.3 KB
ID:	48570  

Last edited by glennsea; 10-01-2010 at 03:45 PM.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 10-01-2010, 04:18 PM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,767
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
Have you changed the valve springs to something other then stock ?


Cole
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 10-01-2010, 04:26 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: NC
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I haven't but the head were redone before I got the car and had new springs installed.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 10-01-2010, 04:30 PM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,767
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
Quote:
Originally Posted by glennsea
I haven't but the head were redone before I got the car and had new springs installed.
Looks to me like you will need a set of studs and guide plates to fix the problem. JMO
Maybe someone else will chime in here in a bit.
Do you know what cam is in the engine? The specs would be nice if you can.

Cole
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 10-01-2010, 04:37 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Jax Fl
Posts: 383
Wiki Edits: 0

Thanks: 17
Thanked 4 Times in 2 Posts
In the pictures the angle does'nt look right. Make sure that the pushrod is sitting in the center of the lifter as previously stated by techinspector1. Sometimes the pushrod will feel like it is sitting in the center but it is actually sitting up on the edge of the lifter. When you put the push rod in the hole and adjust the valve you should still be able to spin it or roll it between your finger and thumb. If you can't then it is not sitting in the center of the lifter.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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:

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

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
rocker arm to valve stem jeepers creepers Engine 9 02-01-2009 07:21 PM
rocker arm studs twisted91 Engine 9 12-21-2007 11:14 PM
Loose rocker arm 85CHEVY Engine 6 04-09-2006 09:02 AM
Using old rocker arm balls as thick washers for positive stop studs? Dubz Engine 10 01-02-2005 03:04 PM
Rocker arm wearing into stud and bending pushrods? Meangreen Engine 19 12-28-2003 10:59 AM


All times are GMT -6. The time now is 05:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.