cold start engine clicking - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > cold start engine clicking

Spartan Locker Promo Running now @ ROCKRIDGE 4WD plus FREEG2 Disc Brake Conversion Kit for Jeep Wrangler YJ TJ LJ ChTJ Wrangler 4" Rough Country Suspension Lift Kits in

Reply
Unread 01-19-2011, 08:30 AM   #1
islandwheeler
Registered User
2000 WJ 
 
Join Date: May 2010
Location: New York
Posts: 135
Wj cold start engine clicking

I have a 2000 WJ 4.7, and I've been noticing lately that whenever I start it up, especially when cold, the engine makes a clicking sound until it has reached operating temperature. I've popped the hood to see if I could figure anything out and I thought it was something on either the fan or belt assembly. Any ideas? Does this happen to anyone else?

__________________
2000 WJ 4.7L - 4.5" 32" KM2
2000 TJ 4.0 5spd
2001 XJ 4.0 79k
2012 WK2 Altitude Hemi
islandwheeler is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 10:07 AM   #2
65Mustangs
Registered User
2003 WJ 
 
Join Date: Jan 2005
Location: Portland, OR
Posts: 131
Does it have a mechanical fan? It could be the fan clutch rattling. With the engine off, see if you can spin/rattle the fan by hand (as if it's loose).

The other thing would be oil. Are you using the right viscosity (especially for your climate), and is it new or old? Some high mileage engines will begin to "rattle" or "click" when the engine oil is due to be replaced (this is due to worn out parts in the engine itself). This also depends on your local climate. There is a big difference when it's -20* below outside, vs. 40* and raining.
65Mustangs is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 11:39 AM   #3
miked5
Registered User
2001 WJ 
 
Join Date: Nov 2010
Location: eugene, oregon
Posts: 2
Mine does a slight ticking that I assumed was injector related. It starts ticking and slowly goes into an eight tick cycle with pauses in between the 8 tick cycles.
Never really thought to much about it but now I'm wondering.
miked5 is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 11:44 AM   #4
MONSooNmonkey
Registered User
1998 XJ Cherokee 
 
Join Date: Jan 2011
Location: boggerville, pennsylvania
Posts: 1,293
Lifters click when cold and worn out.
Wrist pins\piston rings will 'tah tah tah tah tah tah tah' when cold and worn out
Bearings will 'tik tik tik tik tik tik tik' when cold and warn out
Bearings are associated with running hot.

What kind of sound is it? (sounds stupid but every engine issue makes a different sound)
__________________
Sadface :(
MONSooNmonkey is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 11:47 AM   #5
65Mustangs
Registered User
2003 WJ 
 
Join Date: Jan 2005
Location: Portland, OR
Posts: 131
I just had another thought, but sometimes an exhaust leak will sound like a tic or click. You can check your manifolds and collectors / flanges to see if all the bolts are tight. Might also stick your head under the car while it's making the noise.
65Mustangs is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 11:50 AM   #6
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Exhaust manifold gasket/broken studds?
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 12:46 PM   #7
88yjproject
Registered User
2002 WJ 
 
Join Date: Feb 2010
Location: Wyoming, Michigan, Michigan
Posts: 1,078
I'm going with the broken exhaust manifolds bolts also. Common on 4.7 and 5.7 engines.
__________________
2002 WJ 4.0 3" IRO, ES9000 shocks. Midland CB. 245/75R16 Dunlop M/T.
HydroLocked Offroad
88yjproject is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 02:34 PM   #8
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 7,165
read this thread:

http://www.jeepforum.com/forum/f310/...cking-1155704/
86cj74.2L is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:01 PM   #9
MONSooNmonkey
Registered User
1998 XJ Cherokee 
 
Join Date: Jan 2011
Location: boggerville, pennsylvania
Posts: 1,293
Quote:
Originally Posted by 88yjproject View Post
I'm going with the broken exhaust manifolds bolts also. Common on 4.7 and 5.7 engines.
Would it go away when it warms up?
__________________
Sadface :(
MONSooNmonkey is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:14 PM   #10
narnwv
Moderator
 
narnwv's Avatar
2000 WJ 
 
Join Date: Sep 2009
Location: Cross Lanes, WV
Posts: 6,248
Quote:
Originally Posted by MONSooNmonkey View Post
Would it go away when it warms up?
as it heats, metal expands, so yes it would go away when warmed up (the manifold can reach 800+ degrees)
__________________
~Aaron

narnwv is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:14 PM   #11
CoolGuyDave
Registered User
2002 WJ 
 
Join Date: Oct 2006
Location: Northern Illinois
Posts: 636
Quote:
Originally Posted by MONSooNmonkey View Post
Would it go away when it warms up?
yes it is possible.... as your header/headers warm up, the metal expands and closes the gap.
__________________
2002 Overland Build/Pic Thread
NIU Mechanical Engineering Grad
"EAT, SLEEP, JEEP!"
CoolGuyDave is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:16 PM   #12
MONSooNmonkey
Registered User
1998 XJ Cherokee 
 
Join Date: Jan 2011
Location: boggerville, pennsylvania
Posts: 1,293
Quote:
Originally Posted by CoolGuyDave View Post
yes it is possible.... as your header/headers warm up, the metal expands and closes the gap.
Fair enough but he would be able to smell exhaust as well as his o2 sensor should throw an error from the leak.
__________________
Sadface :(
MONSooNmonkey is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:22 PM   #13
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 7,165
read the post I linked to and look for the item circled in the picture. Put your hand on it when you hear the ticking and you will feel it clicking in time with the noise.

Mine does it too and the purge solenoid is the elusive ticking noise on mine....errr...my wife's. (I only get to drive it when it breaks, can't get her out of it)
86cj74.2L is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:23 PM   #14
CoolGuyDave
Registered User
2002 WJ 
 
Join Date: Oct 2006
Location: Northern Illinois
Posts: 636
Quote:
Originally Posted by MONSooNmonkey View Post
Fair enough but he would be able to smell exhaust as well as his o2 sensor should throw an error from the leak.
not always... my roommates car has a cracked header..... it leaks when its cold, but seals when its up to temp. no CEL and you cant smell it unless your head is under the hood.
__________________
2002 Overland Build/Pic Thread
NIU Mechanical Engineering Grad
"EAT, SLEEP, JEEP!"
CoolGuyDave is offline   Reply With Quote Quick reply to this message
Unread 01-19-2011, 03:53 PM   #15
kadetklapp
Registered User
1997 XJ Cherokee 
 
Join Date: May 2008
Location: Indiana
Posts: 1,305
The noise going away when it warms up is a GOOD SIGN for you. That usually means it's just a leaky exhaust manifold. In my case, my 2004 WJ with 113k on it has this noise all the time and it's more "metallic" for the lack of a better term. Pretty sure I have a bearing about to fail.
__________________
**1997 Jeep Cherokee SE**
Former Police Car

2008 "Jeep" Patriot <-----Crap.
kadetklapp is offline   Reply With Quote Quick reply to this message
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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.