5.7L clunky and unrefined - Page 2 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Engine Performance/Intakes/Exhausts

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 08-25-2014, 11:39 PM
FHLH's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Jun 2014
Location: HouTX
Posts: 206
Thanks: 74
Thanked 22 Times in 19 Posts
Rep Power: 1922
FHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond reputeFHLH has a reputation beyond repute
Garage
Re: 5.7L clunky and unrefined

Quote:
Originally Posted by seeingwhite View Post
Is it bad, normal, or just breaking in?

Yes. I had an 2003 Hemi Ram when they came out. Injectors ticked. My Mustang GT did the same thing. Pretty common sound these days. Especially when you have 8 of them going off all the time trying to help you make 350+ HP


Sent from my iPhone using JeepGarage

__________________
'00 Ram 2500 QCLB Cummins 6spd 4x4
'11 GLK350
'13 335i M-Sport
'14 Grand Cherokee Summit EcoDiesel 4x4 (sold)
Reply With Quote
Sponsored Links
Advertisement
 
  #14  
Old 08-26-2014, 07:51 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2013
Location: NJ
Posts: 447
Thanks: 2
Thanked 17 Times in 17 Posts
Rep Power: 1657
Evolv0 is just really nice
Re: 5.7L clunky and unrefined

Quote:
Originally Posted by FHLH View Post
Yes. I had an 2003 Hemi Ram when they came out. Injectors ticked. My Mustang GT did the same thing. Pretty common sound these days. Especially when you have 8 of them going off all the time trying to help you make 350+ HP
Wow I would have never guessed it was the injectors making that noise, I guess it would explain why it gets a lot more noticeable when you put your foot into it.
__________________
Engine- AFE Intake, Moe's 87mm TB, BT CatchCan.
Exhaust- Magnaflow 11385 Xpipe in the center and 2x Magnaflow 14814's in the rear.
Wheels- 20x9 SRT8 Reps
Brakes- SRT8 Brembo BBK + GoodRidge SS Brake Lines.
Reply With Quote
  #15  
Old 08-26-2014, 08:49 AM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,171
Thanks: 341
Thanked 564 Times in 471 Posts
Rep Power: 25596
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Quote:
Originally Posted by Evolv0 View Post

Wow I would have never guessed it was the injectors making that noise, I guess it would explain why it gets a lot more noticeable when you put your foot into it.
That comment now makes me a bit concerned for your motor. If "it" is loud enough to hear when you stomp it I'm like, hmmm.

Wanna post a vid of the sound?
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #16  
Old 08-26-2014, 09:30 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2013
Location: NJ
Posts: 447
Thanks: 2
Thanked 17 Times in 17 Posts
Rep Power: 1657
Evolv0 is just really nice
Re: 5.7L clunky and unrefined

I'll try !
__________________
Engine- AFE Intake, Moe's 87mm TB, BT CatchCan.
Exhaust- Magnaflow 11385 Xpipe in the center and 2x Magnaflow 14814's in the rear.
Wheels- 20x9 SRT8 Reps
Brakes- SRT8 Brembo BBK + GoodRidge SS Brake Lines.
Reply With Quote
  #17  
Old 08-26-2014, 11:23 PM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Oct 2011
Location: Avon, CT USA
Posts: 204
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2310
PECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond repute
Re: 5.7L clunky and unrefined

Yeap, mine sounds like a diesel, too.
__________________
2012 Jeep Grand Cherokee Overland 4x4 5.7L ORAII Mineral Gray Dark/Light Frost Beige
Reply With Quote
  #18  
Old 08-27-2014, 12:06 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2013
Location: NJ
Posts: 447
Thanks: 2
Thanked 17 Times in 17 Posts
Rep Power: 1657
Evolv0 is just really nice
Re: 5.7L clunky and unrefined

I tried to get a video but all I can hear is wind noise, no matter if I hold it inside or outside the car ... I will have to try and get a video this weekend, I know the perfect spot to try.. or maybe have someone old the camera while I drive by.
__________________
Engine- AFE Intake, Moe's 87mm TB, BT CatchCan.
Exhaust- Magnaflow 11385 Xpipe in the center and 2x Magnaflow 14814's in the rear.
Wheels- 20x9 SRT8 Reps
Brakes- SRT8 Brembo BBK + GoodRidge SS Brake Lines.
Reply With Quote
  #19  
Old 08-27-2014, 09:31 AM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,171
Thanks: 341
Thanked 564 Times in 471 Posts
Rep Power: 25596
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Quote:
Originally Posted by Evolv0 View Post
I tried to get a video but all I can hear is wind noise, no matter if I hold it inside or outside the car ... I will have to try and get a video this weekend, I know the perfect spot to try.. or maybe have someone old the camera while I drive by.
This sound is only heard at speed or under load? I was thinking an idle with some revving would let us hear the sound?
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #20  
Old 08-27-2014, 09:55 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2013
Location: NJ
Posts: 447
Thanks: 2
Thanked 17 Times in 17 Posts
Rep Power: 1657
Evolv0 is just really nice
Re: 5.7L clunky and unrefined

Quote:
Originally Posted by 14SummitHemi View Post
This sound is only heard at speed or under load? I was thinking an idle with some revving would let us hear the sound?
only under load while in drive, actual speed doesn't matter either. but I did try revving in my garage and I couldn't hear the sound. you also cant hear the sound with the windows up, and you can only hear it when your driving next to a wall or something for the sound to bounce off of.
__________________
Engine- AFE Intake, Moe's 87mm TB, BT CatchCan.
Exhaust- Magnaflow 11385 Xpipe in the center and 2x Magnaflow 14814's in the rear.
Wheels- 20x9 SRT8 Reps
Brakes- SRT8 Brembo BBK + GoodRidge SS Brake Lines.
Reply With Quote
  #21  
Old 08-27-2014, 10:05 AM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,171
Thanks: 341
Thanked 564 Times in 471 Posts
Rep Power: 25596
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Quote:
Originally Posted by Evolv0 View Post

only under load while in drive, actual speed doesn't matter either. but I did try revving in my garage and I couldn't hear the sound. you also cant hear the sound with the windows up, and you can only hear it when your driving next to a wall or something for the sound to bounce off of.
Duh, u said so in your first post. Well, forget our talk of hemi, injector and water pump sounds. Those don't apply at speed under load.

What octane of gas u use? I haven't got my Hemifever tune yet so I'm running 89 but for a bit i cheaped out and ran 87 and whenever 87 was in her I heard the classic valvetrain rattle a bit when I would juice the throttle. She prefers 89 fo' shizzle. Could also be a valvetrain issue on its own.
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #22  
Old 08-27-2014, 10:14 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2013
Location: NJ
Posts: 447
Thanks: 2
Thanked 17 Times in 17 Posts
Rep Power: 1657
Evolv0 is just really nice
Re: 5.7L clunky and unrefined

Quote:
Originally Posted by 14SummitHemi View Post
What octane of gas u use? I haven't got my Hemifever tune yet so I'm running 89 but for a bit i cheaped out and ran 87 and whenever 87 was in her I heard the classic valvetrain rattle a bit when I would juice the throttle. She prefers 89 fo' shizzle. Could also be a valvetrain issue on its own.
Iv been running 93octane since I purchased the vehicle new. It doesn't sound like a rattle, it honestly sound like the valves opening and closing, just Loud lol
__________________
Engine- AFE Intake, Moe's 87mm TB, BT CatchCan.
Exhaust- Magnaflow 11385 Xpipe in the center and 2x Magnaflow 14814's in the rear.
Wheels- 20x9 SRT8 Reps
Brakes- SRT8 Brembo BBK + GoodRidge SS Brake Lines.
Reply With Quote
  #23  
Old 08-27-2014, 10:18 AM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,171
Thanks: 341
Thanked 564 Times in 471 Posts
Rep Power: 25596
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Quote:
Originally Posted by Evolv0 View Post

Iv been running 93octane since I purchased the vehicle new. It doesn't sound like a rattle, it honestly sound like the valves opening and closing, just Loud lol
Okey dokey, got me stumped. No way a properly running hemi, or any motor, should make concerning sounds of any kind at speed. At idle and low rev you get all sorts of mechanicals clanking if u have the ear for it but at speed, should be relative butter sounding, just louder and "whinier".

Also, since its only under load then anything " torqued up" from load and/or spinning is a suspect...tranny, front/rear diff's....

Try a slight left right swerve at this speed and load to see if pitch or other sound characteristics change. Also, use paddle shifters to see if gear/rpm specific, etc..

Exhaust header leak?

Look forward to a vid if you can snag it.
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #24  
Old 08-27-2014, 04:48 PM
seeingwhite's Avatar
Premium Member
 
Join Date: Jul 2013
Location: FFH
Posts: 601
Thanks: 190
Thanked 86 Times in 61 Posts
Rep Power: 4413
seeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond reputeseeingwhite has a reputation beyond repute
Re: 5.7L clunky and unrefined

Could running 93 octane cause the sound?
__________________
2015 Grand Cherokee Overland
V8, ORA II, Blu-ray RES, RAX Jailbreak
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
rear suspension clunky 99PlatinumWJ Suspension Modifications 20 02-16-2011 06:30 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.