Rattling noise when i start my jeep - JKowners.com : Jeep Wrangler JK Forum
 
JKowners.com : Jeep Wrangler JK Forum  

Go Back   JKowners.com : Jeep Wrangler JK Forum > JK Tech > Electrical & Lighting Tech Dept.

JKOwners.com is the premier Jeep JK Forum on the internet. Registered Users do not see the above ads.
Reply
 
Share Thread Tools Display Modes
Old 10-04-2012, 07:23 PM   #1
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Rattling noise when i start my jeep

Hey guys so every time I start my jeep i hear this rattling noise. It only does it for a few seconds and then it goes away but I was wondering if this is normal or not? If not what could it be?
jknewgirl is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-04-2012, 07:25 PM   #2
Goodysgotacuda
JKO Addict!
 
Goodysgotacuda's Avatar
 
Join Date: May 2009
Member # 4538
Location: Denton, TX
Posts: 13,184
Feedback: 1 reviews
Does it tick for a couple of seconds? Like the engine valve lifters are dry and pumping up?
__________________
'09 2dr Rubicon - 1.0Gal | 6spd | 37s | 4.88s | DIY PSC Ram | OR-Fab cage | Poly Cage | BFH Front | XRC Rear | XRC12 Winch | Walker Evans Beadlocks |
Goodysgotacuda is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 07:35 PM   #3
Illtrythat
Granite Guru
 
Illtrythat's Avatar
 
Join Date: Nov 2011
Member # 18067
Age: 44
Posts: 153
Feedback: 0 reviews
I Have a 07 rubicon in my garage right now that had this problem. We are correcting it by installing a LS3 motor. I'll keep ya posted if it works.
Illtrythat is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 07:43 PM   #4
JKCTAZ
Hey you, yeah, you!
 
JKCTAZ's Avatar
 
Join Date: Apr 2011
Member # 15063
Location: Earth
Age: 39
Posts: 6,636
Feedback: 2 reviews
Quote:
Originally Posted by Goodysgotacuda View Post
Does it tick for a couple of seconds? Like the engine valve lifters are dry and pumping up?
Not to be gender biased, or ageist, but I would surprised if that wasn't Greek to her.
JKCTAZ is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 07:50 PM   #5
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by JKCTAZ View Post
Not to be gender biased, or ageist, but I would surprised if that wasn't Greek to her.
sadly your right lol. but i'm trying to learn as much as i can ever since i got my jeep. So I would love an explanation
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 08:19 PM   #6
JKCTAZ
Hey you, yeah, you!
 
JKCTAZ's Avatar
 
Join Date: Apr 2011
Member # 15063
Location: Earth
Age: 39
Posts: 6,636
Feedback: 2 reviews
Quote:
Originally Posted by jknewgirl View Post
sadly your right lol. but i'm trying to learn as much as i can ever since i got my jeep. So I would love an explanation
When you stop your Jeep, all of the oil in the motor collects in a pan that has a tube and screen near the bottom attached to a pump. When you start your Jeep that pump draws oil from the pan into that screen/tube and sends it to the top of the motor where it lubricates vital engine components, such as lifters and the valve train. If the motor sits for a while, those items go "dry" and make noise when the motor starts to function right before the oil pump primes and lubricates the motor. What exacerbates this issue is cheapo oil filters with no drain back check valve which keeps the oil from completely draining back to the oil pan.

Hope this helps. Usually the noise sounds like ticking or a coffee can with plastic marbles in it at times...

Make sure you check your oil level.
JKCTAZ is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 09:09 PM   #7
snksknr94
Rock God
 
snksknr94's Avatar
 
Join Date: Apr 2011
Member # 14982
Location: Phoenix, AZ
Age: 33
Posts: 548
Feedback: 1 reviews
Could also be a cracked exhaust manifold.
__________________
Aaron
2008 JK Unlimited Rubicon
snksknr94 is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 09:14 PM   #8
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by JKCTAZ View Post
When you stop your Jeep, all of the oil in the motor collects in a pan that has a tube and screen near the bottom attached to a pump. When you start your Jeep that pump draws oil from the pan into that screen/tube and sends it to the top of the motor where it lubricates vital engine components, such as lifters and the valve train. If the motor sits for a while, those items go "dry" and make noise when the motor starts to function right before the oil pump primes and lubricates the motor. What exacerbates this issue is cheapo oil filters with no drain back check valve which keeps the oil from completely draining back to the oil pan.

Hope this helps. Usually the noise sounds like ticking or a coffee can with plastic marbles in it at times...

Make sure you check your oil level.
Thanks how do i know if this is the problem?
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 09:14 PM   #9
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by snksknr94 View Post
Could also be a cracked exhaust manifold.
is there a way to know if this is my issue?
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 09:18 PM   #10
snksknr94
Rock God
 
snksknr94's Avatar
 
Join Date: Apr 2011
Member # 14982
Location: Phoenix, AZ
Age: 33
Posts: 548
Feedback: 1 reviews
Quote:
Originally Posted by jknewgirl View Post
is there a way to know if this is my issue?
Your best bet would be to try and record the noise and post up the clip.
__________________
Aaron
2008 JK Unlimited Rubicon
snksknr94 is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 09:23 PM   #11
bthomas
Rock God
 
bthomas's Avatar
 
Join Date: Feb 2011
Member # 13705
Location: justin tx
Posts: 558
Feedback: 0 reviews
Quote:
Originally Posted by jknewgirl View Post
Thanks how do i know if this is the problem?
not really a "problem" per say, its just an explanation on the source of what i would call the sound of tapping a quarter on a wood table. different oil filters can help somewhat, but ime never completely cure it.

Quote:
Originally Posted by jknewgirl View Post
is there a way to know if this is my issue?
a cracked manifold would most likely do it constantly and get louder as the engine rpms go higher.
__________________
08 2dr steel blue, toyo 37's, rock krawler 2.5" max travel, 1" extended wheelbase, poly cage, 5.13's, arb's, diy hydro assist, prorock44, reid's, rcv's
bthomas is offline   Reply With Quote Quick reply to this message
Old 10-04-2012, 10:04 PM   #12
BenFoo
JKO Addict!
 
BenFoo's Avatar
 
Join Date: Apr 2010
Member # 8805
Location: Philadelphia, PA
Posts: 3,116
Feedback: 3 reviews
Is your AC on when you start up?
BenFoo is offline   Reply With Quote Quick reply to this message
Old 10-05-2012, 03:26 AM   #13
mschaffer66
Rock God
 
mschaffer66's Avatar
 
Join Date: Oct 2010
Member # 11961
Location: West Bloomfield, MI
Age: 34
Posts: 1,573
Feedback: 0 reviews
Quote:
Originally Posted by snksknr94 View Post
Could also be a cracked exhaust manifold.
That was my issue.

Pull off the heat shield and inspect the manifolds or run some seafoam through it and look for where the smoke comes from.
__________________
2007 Sahara Unlimited - Dana 60/14 Bolt - 5.38's with ARBs - 40x13.50x17 Goodyear MTRs - 3.5" Rock Krawler X Factor Plus - Rubi Rock Rails - XRC 10,000lb Winch
mschaffer66 is offline   Reply With Quote Quick reply to this message
Old 10-06-2012, 08:02 PM   #14
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by BenFoo View Post
Is your AC on when you start up?
nope lol AC is never on
Thanks everyone i'm determined to figure it out tomorrow
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-06-2012, 08:12 PM   #15
Alpinehyperlite
Granite Guru
 
Join Date: Jul 2012
Member # 22998
Location: Baton Rouge, La
Age: 27
Posts: 126
Feedback: 0 reviews
I have a work vehicle, so sometimes the jeep goes 3-4 days without being driven. It does the same thing. Ive always wondered what it was, but since it went away after a second or two i never really worried much about it.
Is it something that could potentially damage the vehicle in the long run?
Alpinehyperlite is offline   Reply With Quote Quick reply to this message
Old 10-07-2012, 05:46 AM   #16
Chipewa
Rock God
 
Chipewa's Avatar
 
Join Date: Jan 2012
Member # 19680
Location: Farmington Hills MI
Posts: 1,124
Feedback: 0 reviews
Quote:
Originally Posted by jknewgirl View Post
Hey guys so every time I start my jeep i hear this rattling noise. It only does it for a few seconds and then it goes away but I was wondering if this is normal or not? If not what could it be?
Without reading the entire thread:

Tin-like rattle: Heat shield.
Clatter-like rattle: Surpentine belt tensioner.
__________________
Sprintex Supercharged 2007 JKU X - Red Rock, 2012 JKU Rubicon - Deep Cherry Red, 2001 TJ - Black
Chipewa is offline   Reply With Quote Quick reply to this message
Old 10-08-2012, 03:28 PM   #17
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by Alpinehyperlite View Post
I have a work vehicle, so sometimes the jeep goes 3-4 days without being driven. It does the same thing. Ive always wondered what it was, but since it went away after a second or two i never really worried much about it.
Is it something that could potentially damage the vehicle in the long run?
this is what I am worried about
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-08-2012, 03:29 PM   #18
jknewgirl
Wheeler
 
jknewgirl's Avatar
 
Join Date: Sep 2012
Member # 23830
Location: Georgia
Age: 20
Posts: 41
Feedback: 0 reviews
Quote:
Originally Posted by Chipewa View Post
Without reading the entire thread:

Tin-like rattle: Heat shield.
Clatter-like rattle: Surpentine belt tensioner.
Its definitely a tin-like rattle
jknewgirl is offline   Reply With Quote Quick reply to this message
Old 10-08-2012, 03:41 PM   #19
Dancin Dan
Banned
 
Join Date: Mar 2009
Member # 3812
Location: Locked in a basement
Posts: 16,560
Feedback: 0 reviews
Quote:
Originally Posted by jknewgirl View Post
Its definitely a tin-like rattle
Take a look at the heat shield under the Jeep and see if anything is touching the exhaust pipe. Could be something as simple as this. I had a rattle that drove me nuts for awhile and it turned out to be a piece of the heat shield touching the exhaust pipe.
Dancin Dan is offline   Reply With Quote Quick reply to this message
Old 10-08-2012, 10:51 PM   #20
red_man22
Wheeler
 
red_man22's Avatar
 
Join Date: Oct 2011
Member # 17616
Location: Lewiston, Id
Posts: 91
Feedback: 0 reviews
I have something very simular on my 2011 with the 3.8L and it is the lifters starving for oil. The 2nd post hit it on the head. There is no fix for this and mopar dose not claim it to be a problem and says it will never hurt the engine. Me being a tech I argued this point for a customer but was at the loosing end of the battle.

Any time there is something that is starved for oil there is excesive clearance that is normally not there when the oil is present. The click you hear is metal on metal. I argued that anything metal on metal rubbing together will cause excessive wear. it may be minimal but it can possibly grow into a larger problem. But as I said I have tryed to argue the point befor and it got nowhere. There are a lot of 3.8L with a lot of miles on them that this has not caused a problem yet but there are a lot of guys that get paid a lot more then I do to figure those things out.
__________________
Build it! Run it! Break it! Repeat!
red_man22 is offline   Reply With Quote Quick reply to this message
Old 10-09-2012, 05:25 AM   #21
Chipewa
Rock God
 
Chipewa's Avatar
 
Join Date: Jan 2012
Member # 19680
Location: Farmington Hills MI
Posts: 1,124
Feedback: 0 reviews
Quote:
Originally Posted by jknewgirl View Post
Its definitely a tin-like rattle
Check the heat shield that is attached to the crossover pipe under the front passenger seat for a broken spot weld.
__________________
Sprintex Supercharged 2007 JKU X - Red Rock, 2012 JKU Rubicon - Deep Cherry Red, 2001 TJ - Black
Chipewa is offline   Reply With Quote Quick reply to this message
Old 10-09-2012, 08:34 AM   #22
PhilD
TrailDuty.com
 
PhilD's Avatar
 
Join Date: Sep 2007
Member # 143
Location: Texas
Posts: 5,205
Feedback: 5 reviews
Quote:
Originally Posted by bthomas View Post
not really a "problem" per say, its just an explanation on the source of what i would call the sound of tapping a quarter on a wood table. different oil filters can help somewhat, but ime never completely cure it.
X2 I found that Mobil 1, Pure One, and several "high end" filters drained back resulting in low oil pressure when you start the vehicle. I used a Fram XG3600 Extended Guard filter and it does drain back at all and is bigger than the factory filter



Quote:
a cracked manifold would most likely do it constantly and get louder as the engine rpms go higher.
True, but there is also an issue if the connector from manifold to exhaust pipe that can result in exhaust gas escaping until it warms up and seals.
PhilD is offline   Reply With Quote Quick reply to this message
Old 10-09-2012, 08:35 AM   #23
PhilD
TrailDuty.com
 
PhilD's Avatar
 
Join Date: Sep 2007
Member # 143
Location: Texas
Posts: 5,205
Feedback: 5 reviews
Quote:
Originally Posted by Chipewa View Post
Check the heat shield that is attached to the crossover pipe under the front passenger seat for a broken spot weld.
Definitely a rattle problem spot. Easily fixed with a cable clamp or two around the heat shield.
PhilD is offline   Reply With Quote Quick reply to this message
Old 10-09-2012, 09:12 AM   #24
gold knight
JKO Addict!
 
gold knight's Avatar
 
Join Date: Jun 2008
Member # 1460
Location: Dawsonville, Ga
Age: 48
Posts: 11,001
Feedback: 3 reviews
Where in Ga are you? If you're close by you can come out to the M&G in Jasper on Saturday and somebody can try to diagnose it for you. We have 50 years of combined jk experience lol.
Quote:
Originally Posted by PhilD View Post
X2 I found that Mobil 1, Pure One, and several "high end" filters drained back resulting in low oil pressure when you start the vehicle. I used a Fram XG3600 Extended Guard filter and it does drain back at all and is bigger than the factory filter



True, but there is also an issue if the connector from manifold to exhaust pipe that can result in exhaust gas escaping until it warms up and seals.
Yeah if it's the filter issie, I use the same one as Phil and it hasn't been a problem since.

Manifold crack was more of a pff pff pff sound.
__________________
........My other hobbies include: Older cars and trucks; Spending money on unfinished projects, and continuing to not finish them...
N00B's click here!
Quote:
Originally Posted by bsack View Post
Justifying going to Wayolife in that manner is akin to justify going full blowin' dudes homo just because you got sand in your va-jay-jay.
gold knight is offline   Reply With Quote Quick reply to this message
Old 04-25-2013, 01:46 PM   #25
Dittman2564
Granite Guru
 
Dittman2564's Avatar
 
Join Date: Jun 2011
Member # 15844
Location: Central Coast,Ca.
Age: 49
Posts: 125
Feedback: 0 reviews
I am experiencing a similar situation. Only when engine is cold/has been sitting for a while.
My problem is not exhaust,(already replaced drivers side manifold due to extreme crack) and not lifters in my opinion. (37+ years hot rodder,Jeeper,mechanic/ase cerified engine perf./engine elect.&electronics/CARB clean air car course/SMOG certified tech)
My problem appears to be ring gear/starter drive and/or gear related.
It seems like they aren't meshing,weak bendix spring maybe?
It sounds similar to when the ring gear teeth are damaged and starter gear is slipping etc.
Sounds perfect on other occasions.

http://en.wikipedia.org/wiki/Bendix_drive
__________________
"I won't be wronged, I won't be insulted, and I won't be laid a hand on. I don't do these things to other people, and I require the same from them." John Wayne - The Shootist

Last edited by Dittman2564; 04-25-2013 at 02:18 PM.
Dittman2564 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JKowners.com : Jeep Wrangler JK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
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
Display Modes

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

Forum Jump


All times are GMT -7. The time now is 02:42 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.