4.7 Clackity-clack noise on acceleration - JeepForum.com
 
LinkBack Thread Tools
post #1 of 5 Old 10-20-2015, 12:19 PM Thread Starter
distantdog
Registered User
2004 WJ 
 
Join Date: Jan 2007
Location: Kansas City
Posts: 473
4.7 Clackity-clack noise on acceleration

Over the past few months, I've noticed that, usually at hiway speeds, when I accelerate, I can hear a "clackity-clackity" noise coming from the engine. Sorry, thats the best way I can describe it.

I THINK its the engine, but its hard to be sure. Seems central behind the dash.

I mostly notice it under load (going uphill) at higher speeds.

FWIW - Early this year I had a head gasket replacement job done by a shop. Heads were resurfaced as well.


2004 WJ Laredo Special Edition V8 4x4

SOLD: 2001 TJ Sport
distantdog is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 10-20-2015, 12:25 PM
WJCO
Registered User
1999 WJ 
 
Join Date: Dec 2014
Location: Colorado
Posts: 1,249
The conditions under which it happens based on your description, leads me to believe it is pinging. But, I wouldn't describe that as 'clickity-clack.' If it is pinging, try some higher octane gas to see if it goes away or run a decarb through the intake. BG 44k is a good chemical to run in your tank from time to time.

If pinging isn't your issue, post a video of the noise you're hearing if you are able to.

Zone 4,33s,ProRock44,roofrack,Zeon 8s,grill guard,washer relocated,DIY tire carrier,sliders.
WJCO is offline  
post #3 of 5 Old 10-20-2015, 01:25 PM
Double E
Web Wheeler
 
Double E's Avatar
2004 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 5,380
Also sounds somewhat like the driver's side exhaust manifold bolts snapped.

Get under the hood when cold, engine running. Tug on the throttle cable under the airbox to rev the engine a little and if you hear it from the driver's side, by the heat shield, Bob's your uncle.

Common issue and plenty of threads on the topic.

'04 Freedom Edition HO & '04 Overland HO (previous '00 Laredo 4.7)
Double E is offline  
 
post #4 of 5 Old 10-28-2015, 09:05 AM Thread Starter
distantdog
Registered User
2004 WJ 
 
Join Date: Jan 2007
Location: Kansas City
Posts: 473
Ran a tank full of high octane and a bottle of fuel system cleaner and the noise is gone.

Haven't looked at the manifold, but since the noise is gone, I am hoping its ok.

2004 WJ Laredo Special Edition V8 4x4

SOLD: 2001 TJ Sport
distantdog is offline  
post #5 of 5 Old 10-28-2015, 10:06 AM
WJCO
Registered User
1999 WJ 
 
Join Date: Dec 2014
Location: Colorado
Posts: 1,249
Sweet. Glad to hear. Hope it stays that way.

Zone 4,33s,ProRock44,roofrack,Zeon 8s,grill guard,washer relocated,DIY tire carrier,sliders.
WJCO 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









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
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