4.0 bottom end noise (marble sound) - JeepForum.com
Reply
 
LinkBack Thread Tools
post #1 of 20 Old 10-30-2014, 11:27 AM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
4.0 bottom end noise (marble sound)




Last edited by ChrisHager; 11-13-2014 at 12:39 PM. Reason: Fixed broken page from link...
Jayybirdd is offline  
Sponsored Links
Advertisement
 
post #2 of 20 Old 10-30-2014, 11:40 AM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
Could it be a sticky lifter??
Jayybirdd is offline  
post #3 of 20 Old 11-01-2014, 04:32 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
My #1 spark plug was black. Could there be excessive carbon in the cylinder causing that knock.
Also under load I'm hearing pinging
Jayybirdd is offline  
 
post #4 of 20 Old 11-02-2014, 12:28 AM
yossarian19
Registered User
 
Join Date: Jul 2014
Location: Nevada CIty
Posts: 180
If there is excessive junk in one cylinder but not the others, there a problem worth finding & fixing in that cylinder.
yossarian19 is offline  
post #5 of 20 Old 11-03-2014, 04:47 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
Might be from where I seafoamed it
Jayybirdd is offline  
post #6 of 20 Old 11-13-2014, 12:22 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
Bump
Jayybirdd is offline  
post #7 of 20 Old 11-14-2014, 09:56 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
I'm just thinking piston slap. Because the noise goes away when warm
Jayybirdd is offline  
post #8 of 20 Old 11-15-2014, 12:11 AM
rep-tile
Cash 4 clunkers survivor
 
rep-tile's Avatar
2004 WJ 
 
Join Date: Jul 2013
Location: bakersfield
Posts: 1,564
It sounds like a 4.0. lol. If it ain't loud, don't worry about it.

Idk it could be something that got loose and is vibrating against the engine block. If you want to narrow it down, use a stethoscope.
rep-tile is offline  
post #9 of 20 Old 11-15-2014, 06:19 AM
dlundblad
Registered User
2003 WJ 
 
Join Date: Jun 2009
Posts: 613
Try a mopar filter. Mine sounded about like that.

03 WJ Laredo 4.Sl0w
2" BB-Overland Skids
IPF 868 lights-197K
245/75/16 GY DuraTracs
dlundblad is offline  
post #10 of 20 Old 11-15-2014, 03:21 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
Quote:
Originally Posted by dlundblad
Try a mopar filter. Mine sounded about like that.
It's heavy knocking when cold the past couple nights until it warms up.
What would the mopar filter do? I have a purolater in right now
Jayybirdd is offline  
post #11 of 20 Old 11-15-2014, 04:14 PM
jeepyard
Registered User
1993 ZJ 
 
Join Date: Jul 2011
Location: plainville
Posts: 388
Say it completely goes away when it warms up? Could be a weak lifter, my 04 done this and I wound up pulling the head and putting a new set of lifters in it. Been quiet every since (knock on wood) I bought a 2000 with a 4.0 that had a broken piston that was noisy all the time, warm or cold it never went away. Had to replace the pistons to get that noise taken care of. Could try some marvel mystery oil in the oil to see if it helps. I tried a few different things in my 04 but it just never got any better and that's why I yanked the head and put new lifters in.
jeepyard is offline  
post #12 of 20 Old 11-15-2014, 06:47 PM Thread Starter
Jayybirdd
Registered User
2004 WJ 
 
Join Date: Aug 2012
Location: Hoover
Posts: 364
Quote:
Originally Posted by jeepyard
Say it completely goes away when it warms up? Could be a weak lifter, my 04 done this and I wound up pulling the head and putting a new set of lifters in it. Been quiet every since (knock on wood) I bought a 2000 with a 4.0 that had a broken piston that was noisy all the time, warm or cold it never went away. Had to replace the pistons to get that noise taken care of. Could try some marvel mystery oil in the oil to see if it helps. I tried a few different things in my 04 but it just never got any better and that's why I yanked the head and put new lifters in.
That's what I'm thinking since it goes away when warm. I don't hear it while driving or reving. It's a dull knocking though and it isn't consistent. Wonder what's going on in there.
Jayybirdd is offline  
post #13 of 20 Old 11-15-2014, 08:00 PM
dlundblad
Registered User
2003 WJ 
 
Join Date: Jun 2009
Posts: 613
Quote:
Originally Posted by Jayybirdd
It's heavy knocking when cold the past couple nights until it warms up. What would the mopar filter do? I have a purolater in right now
To be honest I can't give you a scientific response. I am guessing it has something to do with the bypass inside the filter since they are different between the 2. Mine seems quieter with a Mopar filter at least. Either way, I'd ditch the Purolator. They are known for tearing at the moment.

03 WJ Laredo 4.Sl0w
2" BB-Overland Skids
IPF 868 lights-197K
245/75/16 GY DuraTracs
dlundblad is offline  
post #14 of 20 Old 11-16-2014, 12:35 AM
rep-tile
Cash 4 clunkers survivor
 
rep-tile's Avatar
2004 WJ 
 
Join Date: Jul 2013
Location: bakersfield
Posts: 1,564
Quote:
Originally Posted by dlundblad View Post
To be honest I can't give you a scientific response. I am guessing it has something to do with the bypass inside the filter since they are different between the 2. Mine seems quieter with a Mopar filter at least. Either way, I'd ditch the Purolator. They are known for tearing at the moment.
Not just the bypass system, it also has to do with anti-drainback valve and the media itself. They all can affect oil flow and oil pressure.

Interesting, I stopped using Puro ever since they've been selling at Walmart... sounds like they started cutting corners as I feared. They used to be very descent filters though.

I think you might be disappointed to hear that Mopar doesn't make oil filters. In fact last time I checked they were made by Purolator.
rep-tile is offline  
post #15 of 20 Old 11-16-2014, 01:35 AM
1997xj5speed1
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2013
Location: Grand Rapids
Posts: 221
Go for a WIX or napa gold filter

1997 Jeep Cherokee Sport 4x4 4.0 Auto 160,000 miles
1997xj5speed1 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 3 (0 members and 3 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome