Lifter Problems/Head Problems - 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 04-15-2006, 10:15 PM
New Member
 
Join Date: Jun 2004
Location: Leesville, LA
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Lifter Problems/Head Problems

A few problems for the 350 in my 67 Chevelle. Valve problems in the heads have forced me to have them rebuilt. Oh the joys. Any how I noticed today that a lifter had come apart for the second time since I had the motor built. And for some reason perhaps just luck it was on the same side of the motor as the last one that came apart. This time it happened on a different valve. Does anyone have any idea why this happens? I would really hate to get the heads back and put everything back together just so that this could happen again. If anyone has any insight to this problem please let me know. The other question I had was about roller lifters. Right now I am using a hydraulic cam with hydraulic flat lifters. Would I have to change my cam if I wanted to use hydraulic roller lifters? Thanks in advance.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-15-2006, 10:35 PM
Siggy_Freud's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Dec 2003
Location: Portland, Oregon
Age: 29
Posts: 2,371
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
You would have to change to a roller cam. I believe their lobes are hardened and their ramp style is different (normally steeper for the given duration of a cam).
__________________
Bringing history and technology together.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-16-2006, 05:46 AM
Kevin45's Avatar
Just one of the guys
 

Last journal entry: Garage Toys
Last photo:
Join Date: Jul 2002
Location: Urbana, Ohio
Age: 58
Posts: 3,058
Wiki Edits: 0

Thanks: 1
Thanked 15 Times in 15 Posts
Roller lifters takes a roller cam. Roller rockers don't. Why would your lifter come apart twice unless the mechanic is pulling them apart for some reason before installation and not putting them back together right. If not, then I would change brands of lifters and go with a brand name if you are now using an off brand. I could see it happening once, as maybe a factory reject, twice and it sounds like some Chinese knockoffs. And when you say it comes apart...it is coming completely apart as to where the internals or coming out? If that is the case, then it sound as if something is not compatable with something else. Even if the top snap ring came out of the lifter, the pressure from the valve spring to the rocker, to the pushrod, should keep the guts in the lifter. If the guts come out, then there is a length problem somewhere. Are your studs remaining in the head, or are they starting to pull out. (screw in studs vs. press in studs)

Kevin
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-16-2006, 07:37 AM
Bumpstick's Avatar
Hammer and a torch
 
Last photo:
Join Date: May 2003
Location: Southeast TX
Age: 54
Posts: 1,258
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The reason most hyd. lifters come apart is because of what some call "floating the valves" when actualy they are floating the lifters... Revving it to high for what the valve train will support...

Not to say you may possibly have had a defective lifter but twice...?

Also the hyd. roller question had been answered...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-16-2006, 01:47 PM
New Member
 
Join Date: Jun 2004
Location: Leesville, LA
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Kevin....I had pressed studs but right no the heads are in the shop getting rebuilt. I will have screw in studs with guide plates for the push rods. The lifters are from crane just as the cam is. They are suppose to float at 7 grand and I have never had the motor at that high of speed. Hopefully after the rebuild these problems will go away and the motor will run like it did when it was first built. As for the roller cam question thanks for the reply from everyone....guess I will be sticking with the hydraulic cam with flat lifters for now.....perhaps later or on the next motor I will go with the roller cam and lifters. I will keep you all posted on my luck with the rebuilt top end.
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
Valve Lash adjustment hiball Engine 36 05-11-2009 10:12 AM
lifter preload problems ko.17 Engine 4 08-22-2005 05:28 AM
hydraulic cams/lifters brian12c Engine 4 03-07-2005 08:46 PM
lifter problems derrick1977 Engine 6 12-14-2002 05:14 PM
250 lifter problems 78novaman Engine 0 12-05-2002 09:28 AM


All times are GMT -6. The time now is 06:33 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.