clacking sound until engine warms up - 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 05-13-2005, 08:12 PM
Member
 
Join Date: Apr 2005
Location: Cincinnati,ohio
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
clacking sound until engine warms up

I searched the forums and found that it sounds like the clacking sound my 357 makes is a bad lifter or two..., but does this sound generally quite down after the engine warms up? B/c my engine only makes the sound at idle for a little while, but once I take it out and jsut drive it around the block and park it, the sound seems to go away. I was jsut wandering if a bad lifter will quite down liek this, and should I try that lucas stabalizer? The thing that sucks is I just built this motor and it has less than 1,000 miles on it, and it was also the first engine I've built top to bottom by myslef.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-13-2005, 08:36 PM
Member
 
Last photo:
Join Date: Nov 2004
Location: Indiana
Age: 60
Posts: 393
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It sounds like a bad lifter all right. If you can narrow it down to which bank you can pull that valve cover. With the engine cold try to push down the rocker on the cam lobe side. You shouldnt be able to move it. If you have a bad lifter it will probably move.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-13-2005, 08:41 PM
Member
 
Join Date: Apr 2005
Location: Cincinnati,ohio
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
another thing is they are hydraulic lifters, when i push down on the rocker above the pushrod, won't the rocker and pushrod move anyways since they are hydraulic lifters?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-13-2005, 09:31 PM
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
Did you build it with forged pistons...?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-13-2005, 09:40 PM
Member
 
Last photo:
Join Date: Nov 2004
Location: Indiana
Age: 60
Posts: 393
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 1quiknova
another thing is they are hydraulic lifters, when i push down on the rocker above the pushrod, won't the rocker and pushrod move anyways since they are hydraulic lifters?
the lifter should have oil in it and you wont be able to move it unless its bad.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-13-2005, 10:04 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 37
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It sounds like piston slap possibly caused by a collapsed piston skirt. I hope I am wrong. When the engine warms up the excessive clearance between the skirt and the cylinder wall get tighter. That is why the noise gets quieter.

The way to check is to pull one spark plug wire at a time. Only pull one wire at a time and see if removing one makes the sound go away. Obviously the one that quiets it down is where the problem is.

Piston slap will be the worst when the engine is cold. You will hear it when the car is just coming out of idle, and under load.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-14-2005, 10:28 PM
Member
 
Join Date: Apr 2005
Location: Cincinnati,ohio
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I only here this nosie at idle, I don't hear it at all when I rev it gradually, fast, under load, or anything jsut at idle, and it also is only loud enough where you can here it if you're under the hood, so it's not horribly loud. I'm leaning toward a bad lifter and will try what 454me said, I just haven't had time yet.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-14-2005, 11:13 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 37
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 454me
the lifter should have oil in it and you wont be able to move it unless its bad.
The fast bleed lifters will be able to be pushed by hand.

Just because I am one strong mother... I can sometimes compress stock springs down and open the valve by hand. It can be hard to tell which way you are getting movement when doing this. It could be the valve, or it could be at the lifter. You have to look closely.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-15-2005, 05:01 AM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
brand new roller rockers also do that.could that possibly be it.try putting some mystery oil in it.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
SBC 350 superiority rebuttle...was:POWERED BY CHEVY, WRITTEN ON A FORD, (from 'Engine Oldsmolac911 Hotrodders' Lounge 50 01-12-2011 10:00 PM
Carburator Terrano Engine 10 08-07-2004 11:22 AM
How does this engine combo sound? Dubz Engine 11 10-26-2003 07:13 PM
Investigating Strange Engine Sound horvath Engine 15 07-15-2003 09:56 AM
How's this engine combo sound. 70 nova Engine 11 07-09-2003 09:06 PM


All times are GMT -6. The time now is 11:58 PM.


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.