Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 02-02-2010, 08:05 PM
tman4024's Avatar
Lehigh Mountain Hawk
My Jeep: 2008 5.7L WK
 
Join Date: May 2009
Posts: 1,662
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3615
tman4024 has a reputation beyond reputetman4024 has a reputation beyond reputetman4024 has a reputation beyond repute
Send a message via AIM to tman4024
Engine knocking

I give my Jeep about 5-10 mins to warm up but when I come out I notice the engine has been making a knocking noise. I drive it to work about 10 min drive and no knocking. I need to unflash my CMR and see if that makes any difference, but I thought I would get some opinions as well.

Could it just be from the cold or should I take it in to the dealer?
__________________

__________________
Reply With Quote
  #2  
Old 02-02-2010, 08:13 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,985
Thanks: 855
Thanked 877 Times in 647 Posts
Rep Power: 7717590
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Engine knocking

like a lifter click?
__________________

__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #3  
Old 02-02-2010, 08:15 PM
tman4024's Avatar
Lehigh Mountain Hawk
My Jeep: 2008 5.7L WK
 
Join Date: May 2009
Posts: 1,662
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3615
tman4024 has a reputation beyond reputetman4024 has a reputation beyond reputetman4024 has a reputation beyond repute
Send a message via AIM to tman4024
Re: Engine knocking

It may be... a couple months ago my dad said he heard it knocking a little and said it could be a lifter. I didn't really notice anything at the time, but it could be the same thing he was hearing just louder now...
__________________
Reply With Quote
  #4  
Old 02-02-2010, 08:18 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,985
Thanks: 855
Thanked 877 Times in 647 Posts
Rep Power: 7717590
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Engine knocking

what oil are you running?
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #5  
Old 02-02-2010, 08:26 PM
tman4024's Avatar
Lehigh Mountain Hawk
My Jeep: 2008 5.7L WK
 
Join Date: May 2009
Posts: 1,662
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3615
tman4024 has a reputation beyond reputetman4024 has a reputation beyond reputetman4024 has a reputation beyond repute
Send a message via AIM to tman4024
Re: Engine knocking

5-20 mobil1
__________________
Reply With Quote
  #6  
Old 02-02-2010, 08:48 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,985
Thanks: 855
Thanked 877 Times in 647 Posts
Rep Power: 7717590
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Engine knocking

hmm......08 right? Warranty?
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #7  
Old 02-02-2010, 10:47 PM
tman4024's Avatar
Lehigh Mountain Hawk
My Jeep: 2008 5.7L WK
 
Join Date: May 2009
Posts: 1,662
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3615
tman4024 has a reputation beyond reputetman4024 has a reputation beyond reputetman4024 has a reputation beyond repute
Send a message via AIM to tman4024
Re: Engine knocking

Yeah, still under warranty.
__________________
Reply With Quote
  #8  
Old 02-03-2010, 05:32 AM
blackpepper's Avatar
Senior Member
My Jeep: 2009 6.1L WK
 
Join Date: May 2009
Location: SF Bay Area
Posts: 6,435
Thanks: 67
Thanked 39 Times in 28 Posts
Rep Power: 13436
blackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond reputeblackpepper has a reputation beyond repute
Re: Engine knocking

All HEMIs knock a little I think... I would start simple with some fuel injector cleaner and see if that helps.
__________________
Ryan
2009 SRT8 - loaded, corsa exhaust, afe stage ii intake, diablo intune w/ Johan toona, vreds 275/315, r1 drilled/slotted rotors, stoptech pads, lockpick adapter, billet tech catch can, 180 tstat, eibach springs, bwoody links, stage 6 qa1 shocks, tail light tint, front window tint, stillen hl brows, lloyd mats, powder-coated alcoas, red srt lettering, trim color-matched...

2007 Jeep 5.7 Limited - 120,681 miles, one owner. SOLD
Reply With Quote
  #9  
Old 02-03-2010, 08:07 AM
Member
 
Join Date: Jan 2010
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1679
HemiJeep4x4 is on a distinguished road
Re: Engine knocking

Its only the MDS it knocks at idle because its running as a 4 cylinder.But deffinately Mobile 1 isnt what it used to be they changed it.I myself use Royal Purple 2/20 no issues better fuel economy but if idleing long enought it has a slight knock if its the hemi its the cylinder deactivation you hear thats knocking.
Gary
__________________
Reply With Quote
  #10  
Old 02-03-2010, 11:00 AM
LTrainGC's Avatar
Senior Member
My Jeep: 2013 5.7L WK2
 
Join Date: May 2009
Location: St. Petersburg, FL
Posts: 2,194
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 4177
LTrainGC has a reputation beyond reputeLTrainGC has a reputation beyond reputeLTrainGC has a reputation beyond reputeLTrainGC has a reputation beyond repute
Re: Engine knocking

I'm pretty sure MDS doesn't activate if the vehicle is in park. I can't confirm this though. However, I have MDS disabled and notice not what I would call a knock - but more like a light tick/tap if I let the truck idle for an extended period of time.

Also, isn't the consensus that it isn't good to let the engine warm up for an extended period of time? In the mornings and after work I'll start it and give it maybe 20-30 seconds and then off I go.
__________________
2013 WK2 Overland HEMI 4x4
Bright White / New Saddle
Reply With Quote
  #11  
Old 02-03-2010, 11:47 AM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,985
Thanks: 855
Thanked 877 Times in 647 Posts
Rep Power: 7717590
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Engine knocking

its not the MDS...that doesnt kick in till like 52 mph....right?
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #12  
Old 02-03-2010, 11:49 AM
tman4024's Avatar
Lehigh Mountain Hawk
My Jeep: 2008 5.7L WK
 
Join Date: May 2009
Posts: 1,662
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3615
tman4024 has a reputation beyond reputetman4024 has a reputation beyond reputetman4024 has a reputation beyond repute
Send a message via AIM to tman4024
Re: Engine knocking

MDS can activate any time while in drive. Not sure if it kicks in when in park. I've never actually checked the EVIC. I'll try to remember to check that tonight when leaving work.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why do I like the 4.7L engine? AIR_RAM Performance Modifications 38 01-24-2013 05:42 PM
Clicking/Knocking Problem on 04' WJ I6 Chaoul1 Troubleshooting/Problems 38 02-09-2010 08:41 PM
What to Do w/ Engine Light? DAVY27 Grand Cherokee - WK 9 10-09-2009 04:14 PM
how hot does your engine get> jeeppro Grand Cherokee - WK 28 08-10-2009 11:53 PM
Knocking out the new mods!!! BUBBADOG Grand Cherokee - WK 12 07-04-2009 11:02 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:30 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community