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Unread 02-07-2012, 04:15 PM   #1
DavidC
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Potential 2012 Pentastar issue?

Well I have been noticing a ticking noise coming from the drivers side of the engine that has grown louder.

Did a search and lo and behold here's what was found so far.........

http://www.wranglerforum.com/f33/upd...ad-137608.html

http://www.jeepforum.com/forum/f96/2...light-1299151/

Felt it was time to start a new thread with a different title as there appears to be an identified issue with a head replacement as possible solution.


Wanted to check in with other 2012 owners and hear what ya'll have to say.

07-11 JK 3.8 owners go easy on us early penta jesus adopters.

Will be setting up a service appoint as soon as I can.

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2012 JKU Rubi,Auto, 4.10's "takes a licking and keeps on ticking"
99 Sahara D30/44 w ARB's and 4.10's, Warn 9.5TI,AA SYE & Wood's shaft,Raingler nets,Jeeperman trail skids,Warn gas tank and steering box skid's, BDS 2" springs, Currie control arms,32" MTR's,AEV Bridger wheels, custom made tire carrier bumper,Dynomax cat back JKS quicker disco's.PSC Trail Cage,Banks header,LiteDots.PSC Trail Corners.
92 CDN M101 trailer, 33" TSL Swampers,camo paint. Original camo tarp.
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Unread 02-07-2012, 04:19 PM   #2
Spank
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Need more info. Manual? Auto? Does it do it in gear? Does the time between ticks decrease when you give it gas?

Mine knocked (but ticking would be accurate, too) when the Jeep wasn't in gear. I thought it was the engine, but it ended up being the throw-out bearing, which has been hit or miss with the JK since '07. Got it fixed under warranty and the noise is gone.

EDIT: Nevermind. Read your sig in your profile and you've got an auto. Either way, take it to the dealership.
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Unread 02-07-2012, 04:27 PM   #3
DavidC
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auto tranny

Noise at idle and increases in speed with engine rev's while Jeep is sitting still.

Not mine but here's examples



Just to clarify... I'm a gear head and have rebuilt a few engines in my day.(even an ol 1952 Dodge M-37 army truck straight 6)

Most definately valve train noise. And it's getting louder.
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2012 JKU Rubi,Auto, 4.10's "takes a licking and keeps on ticking"
99 Sahara D30/44 w ARB's and 4.10's, Warn 9.5TI,AA SYE & Wood's shaft,Raingler nets,Jeeperman trail skids,Warn gas tank and steering box skid's, BDS 2" springs, Currie control arms,32" MTR's,AEV Bridger wheels, custom made tire carrier bumper,Dynomax cat back JKS quicker disco's.PSC Trail Cage,Banks header,LiteDots.PSC Trail Corners.
92 CDN M101 trailer, 33" TSL Swampers,camo paint. Original camo tarp.
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Unread 02-07-2012, 08:27 PM   #4
cf1
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Quote:
Originally Posted by DavidC View Post
auto tranny

Noise at idle and increases in speed with engine rev's while Jeep is sitting still.

Not mine but here's examples

http://www.youtube.com/watch?v=9ifuqSsBivU

http://www.youtube.com/watch?v=2s3GW-2gS-4

Just to clarify... I'm a gear head and have rebuilt a few engines in my day.(even an ol 1952 Dodge M-37 army truck straight 6)

Most definately valve train noise. And it's getting louder.
just turned 8000 0n my 2012 wrangler, was ticking prety loud untill i changed the oil anf filter. put moble one in ticking very low ..
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Unread 02-07-2012, 08:43 PM   #5
Rivet
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My Jeep is still in the shop getting a new head and parts. It ticked but not as loud as that video. Another funny symptom mine showed after the check engine light/ticking noise started. My "Eco" indicator never came on.
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Unread 02-07-2012, 09:41 PM   #6
JJAMISON_
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guys if you own a 2012 jk/jku and it ticks i'd be calling the dealer. warranty it. i wouldn't wait on a recall.
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Unread 02-07-2012, 09:49 PM   #7
IDRIS
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Caveat: I don't know squat

I don't have answers, only questions.

Could it conceivably be due to something being up with the fuel injection system? The sound seemed to increase in the first video as the camera hovered over that rectangular body with the six black lines coming out of it. My guess is that the box is part of the fuel system.

If the engine is idling at around 800 RPM, then that means 4,800 cycles per minute are going on, divided by two (4-stroke engine), giving 2,400 power strokes per minute. Divide that by 60, and that's 40 fuel-pulses per second.

A 40 Hz vibration (rapid ticking) would sound pretty close to the frequency heard in that first clip. I know what a 60 Hz pulse-sequence sounds like from MIG welding, and various electronic applications - and that's not far off.

The valve train idea would be perfectly within the range of this sound, as well - but I don't know. The reason I'm thinking fuel system is Rivet's comments about the "ECO" light, but I'm not sure at all if the economy light is based directly off fuel flow or RPM. If it's fuel flow, then what would air bubbles in the system do to it, or how the engine runs? If it's RPM, then maybe it is more an issue relating to the valve timing system.

Not claiming any knowledge, here - just generating ideas. Even being wildly wrong helps, sometimes. :-)
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Unread 02-07-2012, 11:29 PM   #8
Rivet
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My check engine light/ ticking was happening well before the ECO light stopped coming on.
I do not think that ticking is from the injectors. Yes the injectors do make noise but the ticking I was experiencing was more of a valve chatter. And it didn't start till I had about 8 thousand miles and at cold starts it was really noticeable. And the valves for the #2 cylinder were "burnt up" according to the tech that is working on my jeep.
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Unread 02-08-2012, 05:17 AM   #9
AppSt59Dave
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Quote:
Originally Posted by JJAMISON_
guys if you own a 2012 jk/jku and it ticks i'd be calling the dealer. warranty it. i wouldn't wait on a recall.
Word up. Can't believe guys with NEW jeeps would rather come on here and ask some couch mechanics instead of taking it to the dealer. There are a lot of qualified guys on here but damn, let someone look at it! Taking my 12 to the dealer to do a leak test today so I will be bringing this up to the guys to have them take a gander. 4200 miles. Drive it til it blows up!
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Unread 02-08-2012, 06:42 AM   #10
DavidC
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Yep called the dealer and have an appointment.

The reason I started the thread was as a "heads up" to the folks who have 2012's and to see if anyone perhaps had the issue.

Perhaps should have been a bit clearer in my initial post.
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2012 JKU Rubi,Auto, 4.10's "takes a licking and keeps on ticking"
99 Sahara D30/44 w ARB's and 4.10's, Warn 9.5TI,AA SYE & Wood's shaft,Raingler nets,Jeeperman trail skids,Warn gas tank and steering box skid's, BDS 2" springs, Currie control arms,32" MTR's,AEV Bridger wheels, custom made tire carrier bumper,Dynomax cat back JKS quicker disco's.PSC Trail Cage,Banks header,LiteDots.PSC Trail Corners.
92 CDN M101 trailer, 33" TSL Swampers,camo paint. Original camo tarp.
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Unread 02-08-2012, 06:55 AM   #11
WXman
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Dude, ALL JKs have had ticking issues. My 2011 ticked so bad when it was new that I came within a hair and taking it in for a service visit. This isn't a new issue that just started with 2012s.

I ended up changing from synthetic to dino oil, and the tick got much less pronounced. Next thing I'm going to try is going from 5W20 (water) to 5W30 and I'm betting it'll quiet the ticking down even more.

But yes, if you are truly concerned, take it to the dealership and get it documented. That way, IF it does blow up at 40K miles you have documentation that you were concerned about it from the beginning. I will say, if you spend as much time with the "new" Chrysler engines (1999 - present designs) as I have you'll start to see that they don't have the best reputation for being long-life engines. Grenading valvetrains before 150,000 miles is very common, and there are a few bottom end problems as well but it's not as common as the top end problems. The new stuff doesn't seem as robust as the older Chrysler designs. That's one reason I'm not that unhappy with my 3.8.

Good luck.
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Unread 02-08-2012, 07:38 AM   #12
tolnep
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Quote:
Originally Posted by WXman View Post
Dude, ALL JKs have had ticking issues. My 2011 ticked so bad when it was new that I came within a hair and taking it in for a service visit. This isn't a new issue that just started with 2012s.

I ended up changing from synthetic to dino oil, and the tick got much less pronounced. Next thing I'm going to try is going from 5W20 (water) to 5W30 and I'm betting it'll quiet the ticking down even more.

But yes, if you are truly concerned, take it to the dealership and get it documented. That way, IF it does blow up at 40K miles you have documentation that you were concerned about it from the beginning. I will say, if you spend as much time with the "new" Chrysler engines (1999 - present designs) as I have you'll start to see that they don't have the best reputation for being long-life engines. Grenading valvetrains before 150,000 miles is very common, and there are a few bottom end problems as well but it's not as common as the top end problems. The new stuff doesn't seem as robust as the older Chrysler designs. That's one reason I'm not that unhappy with my 3.8.

Good luck.
There are specific issues with the new engine that apparently involve the driver side head. search and you will find a number of folks getting a head replaced along with the parts needed to do the replacement and the timing chain.

one source (dealer) said it was because of bad valves that were sticking, causing carbon buildup, pre-ignition and other problems. though there seems to be a prevalence for cylinder 2 so i dont see how bad valves would only manifest themselves in one cylinder of the motor.

one report even has dealers pulling new jeeps off of the lot to do repairs before selling them.

currently problems seem to revolve around jeeps produced in july and august of 2011.
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Unread 02-08-2012, 07:42 AM   #13
DavidC
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Quote:
Originally Posted by WXman View Post
Dude, ALL JKs have had ticking issues. My 2011 ticked so bad when it was new that I came within a hair and taking it in for a service visit. This isn't a new issue that just started with 2012s.

WXman appreciate your insight.

My 2012 JKUR engine when new was as quite as my Acura TL ... well almost.


Still have the TJ and had a built YJ for some time so know very well what normal ticking sounds like. Heck the TJ 4.0 ticks are numerous; emissions, injectors, another cracked exahust manifold, some valve train noise(probably lifters) low end knock on cold start(probably piston slap). Will probably rebuild it at some point but way to busy to tear it apart plus it will probably outlast me as it is. Luckily for me the TJ is a 99 as Jeep screwed up some 4.0 heads around 2003 IIRC.

So yeah I agree that some engines are prone to ticks and that's OK.

When I first got the Jeep was impressed with the quietness and smoothness of the engine. Actually shocked would be more descriptive. A quiet, smooth engine in a Jeep.....what were the engineers thinking?

First noticed the noise and thought due to the cold here it was normal. However as the Jeep warmed up... noise was still there.

As the tick became more pronounced, started looking into it a bit further and found that the ticking noise is isolated to one side of the engine- Drivers.

Used some google fu and found that there appears to be a problem and now will be taking it to the dealer to start the process.

Build Date is 8/11 on my JKUR
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2012 JKU Rubi,Auto, 4.10's "takes a licking and keeps on ticking"
99 Sahara D30/44 w ARB's and 4.10's, Warn 9.5TI,AA SYE & Wood's shaft,Raingler nets,Jeeperman trail skids,Warn gas tank and steering box skid's, BDS 2" springs, Currie control arms,32" MTR's,AEV Bridger wheels, custom made tire carrier bumper,Dynomax cat back JKS quicker disco's.PSC Trail Cage,Banks header,LiteDots.PSC Trail Corners.
92 CDN M101 trailer, 33" TSL Swampers,camo paint. Original camo tarp.

Last edited by DavidC; 02-08-2012 at 11:16 AM.. Reason: spelling
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Unread 02-08-2012, 07:46 AM   #14
BigNunz6
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In before the "stop crying its a Jeep thing" from the real Jeep guys......
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Unread 02-08-2012, 09:39 AM   #15
WXman
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Quote:
Originally Posted by DavidC View Post
WXman appreciate your insight.

My 2012 JKUR engine when new was as quite as my Acura TL ... well almost.


Still have the TJ and had a built YJ for some time so know very well what normal ticking sounds like. Heck the TJ 4.0 ticks are numerous; emissions, injectors, another cracked exahust manifold, some valve train noise(probably lifters) low end knock on cold start(probably piston slap). Will probably rebuild it at some point but way to busy to tear it apart plus it will probably outlast me as it is. Luckily for me the TJ is a 99 as Jeep screwed up some 4.0 heads around 2003 IIRC.

So yeah I agree that some engines are prone to ticks and that's OK.

When I first got the Jeep was impressed with the quietness and smoothness of the engine. Actually shocked would be more descriptive. A quite, smooth engine in a Jeep.....what were the engineers thinking?

First noticed the noise and thought due to the cold here it was normal. However as the Jeep warmed up... noise was still there.

As the tick became more pronounced, started looking into it a bit further and found that the ticking noise is isolated to one side of the engine- Drivers.

Used some google fu and found that there appears to be a problem and now will be taking it to the dealer to start the process.

Build Date is 8/11 on my JKUR


I understand and I don't blame you for getting it looked at. Seems that the teething process with the new engines has begun. Keep us posted.
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