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Old 11-09-2011, 04:42 PM   #61
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Quote:
Originally Posted by oilwell1415 View Post
I didn't pull it out of thin air, I picked a number that was easy to do the math for. It doesn't matter anyway. At 1200 rpm it does everything 10 times a second. The question remains, what in the engine happens every 3 seconds?
Burn a 1/4 of an ounce of gasoline every 3 seconds

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Old 11-09-2011, 10:28 PM   #62
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I was at the dealer checking out the 2012 JK. While my salesguy was inside getting the key I had the hood up checking out the new engine.

Another salesman came and got into a 2012 300 sitting in the row directly across from where I was. He cranked that engine and when it started I swear it was the most godawful engine clatter I've heard in my entire life.

For a few seconds it sounded like there was no oil in this engine. It was a VERY loud clatter that smoothed out after about 5 seconds or so. I must have been staring bugeyed at the salesguy in the 300 because he looked at me and just shrugged.

This was not a tick and I'm sure it was much louder than anything described here in this thread.

Don't even know if it was related to the problems in this thread but I thought it was worth noting.

And the 2012 JKU I drove made no weird sounds at all.

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Old 11-10-2011, 08:24 AM   #63
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Quote:
Originally Posted by Overtrained View Post
Burn a 1/4 of an ounce of gasoline every 3 seconds
But that makes this noise:
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Old 11-10-2011, 08:25 AM   #64
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Quote:
Originally Posted by oilwell1415

But that makes this noise:
Well if you want to get technical.......it does make noise.......that would be what comes out of the exhaust.....
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Old 11-10-2011, 08:30 AM   #65
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Well if you want to get technical.......it does make noise.......that would be what comes out of the exhaust.....
Burning the fuel doesn't make any noise. It's the relief of pressure that makes the noise. If you want to get technical.
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Old 11-10-2011, 08:40 AM   #66
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Perfect example
Where did you come up with the 600 rpm
Idle figure
Does the Pentastar idle at 600?
No you pulled that # out of thin air

I don't want to argue about it
But you have got to admit some of the theories in this thread were shot from the hip
Some folks can shoot from the hip with deadly aim
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Old 11-10-2011, 08:40 AM   #67
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Quote:
Originally Posted by oilwell1415

Burning the fuel doesn't make any noise. It's the relief of pressure that makes the noise. If you want to get technical.
You got me there....lol.
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Old 11-10-2011, 09:38 AM   #68
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Some folks can shoot from the hip with deadly aim
and some cant

BTW the oil filter has no drain back built in,
I did the cold start with the 5W-30 and no more rattle at start up
So the wrong oil was causing my problems

after reading more about the VVT and the complex oil system of the Pentastar, I'm convinced you better keep the oil clean and use a high quality oil of the correct grade
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Old 11-10-2011, 09:53 AM   #69
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Quote:
Originally Posted by oilwell1415 View Post
I didn't pull it out of thin air, I picked a number that was easy to do the math for. It doesn't matter anyway. At 1200 rpm it does everything 10 times a second. The question remains, what in the engine happens every 3 seconds?
nothing now after the oil change using the correct weight

I dont know why you want to argue about it, I simply stated what it was doing, I am well aware of how engines work.

well enough to know that you cannot say that there is "NOTHING" that would cause a noise every 3 seconds. anytime you are dealing with a combination of mechanical, electronic and hydraulic systems anything IS possible.
HAVE A NICE DAY
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Old 11-10-2011, 11:57 AM   #70
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Got my oil changed at 3k, and since this thread started I've been listening for it, but I'm not hearing it in mine.

Sorry?
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Old 11-17-2011, 10:55 PM   #71
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I had the "noise" as well. At 1000 miles I changed the regular oil to a synthetic and the noise that everyone is describing stopped. Unfortunately, now there is a slight popping noise instead of the sort-of ticking sound. The noise only happens when the engine is cold, upon hitting the gas peddle and not simply while idleing. I think the Pentastar is just very sensitive to changes in the oil's viscosity and therefore it makes different noises accordingly (I really am trying to convince myself of this).
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Old 11-18-2011, 05:25 AM   #72
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I still think a lot of start up noise complaints have to do with the location of the oil filter and that it has no anti drain back valve. I woud imagine as temps drop the noise will be louder and duration of the noise will be longer. Also some people are more sensitive to noise and some engines will just be louder than others. I think synthetic oil will help as well as following a severe service oil change interval.
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Old 11-18-2011, 10:22 AM   #73
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You asked for it so welcome to the world of "higher" performance engines. With aggressive cam ramp rates and different piston to wall clearances, you are going to hear more noises at startup and light throttle conditions. Itís been this way for the LS community for a decade now. Anybody here own something with the GM 8.1L motor
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Old 11-19-2011, 10:54 AM   #74
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Here is link on some technical info on the pentastar. It is dated 2010 and doesn't describe the wrangler version but gives you a pretty good background. I have 500 miles on 2012 Unlimited Rubicon and everything is quiet, but I have yet to change the oil.

Pentastar Engines: Overview and Technical Details
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Old 12-12-2011, 06:18 PM   #75
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WINNER WINNER CHICKEN DINNER
oil cap shows 5W30, first oil change receipt shows 5W20.
picked it up and drove it home, No ticking,

will try the cold start in the AM
WTF is going on?!

I'm somehow in the twilight zone...

had dealer change oil @ 1k... back in october. ever since then, she made ticking noises more. and maybe some bubbling/boiling water noises..

i remember reading I THOUGHT in the owners manual... or seeing on the DVD-disk... I read it somewhere ...other than here on WF... that 5w-20 was the correct Pentastar-Wrangler-2012 viscosity.

Got my 3k oil change today (mobil1 synthetic) ...5W30... the oil cap says it...the book in the green owners manual pouch AND ON THE DISC!! 5W30

Why were our first oil changes 5W20? (i didn't tell them what to put in it. and just looked at the paperwork today to confirm) ANd why did i think 5w20 was right?!?! i'm so confused!
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Old 12-12-2011, 07:10 PM   #76
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WTF is going on?!

I'm somehow in the twilight zone...

had dealer change oil @ 1k... back in october. ever since then, she made ticking noises more. and maybe some bubbling/boiling water noises..

i remember reading I THOUGHT in the owners manual... or seeing on the DVD-disk... I read it somewhere ...other than here on WF... that 5w-20 was the correct Pentastar-Wrangler-2012 viscosity.

Got my 3k oil change today (mobil1 synthetic) ...5W30... the oil cap says it...the book in the green owners manual pouch AND ON THE DISC!! 5W30

Why were our first oil changes 5W20? (i didn't tell them what to put in it. and just looked at the paperwork today to confirm) ANd why did i think 5w20 was right?!?! i'm so confused!
like most of us, you would think the dealer and his/her employees know what they are doing.
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Old 12-12-2011, 07:43 PM   #77
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Originally Posted by blackforestgreen

like most of us, you would think the dealer and his/her employees know what they are doing.
I had to make mine drain my first oil change and fill it with the proper oil, which they did not have. So I ended up with a free oil change after I made them buy oil from the auto parts store and put in the correct 5w30. They gave me the 'ol blah blah blah it'll he fine and I said fine I want it in writing that if anything happens to my engine because you used the wrong oil you'll cover it.....never seen people eat their words so fast!
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Old 12-13-2011, 09:05 AM   #78
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Btw, im at my 500 mile mark now and ready to do the oil change. Whats a good or "best" brand to use for 5w30 oil for our 2012 jeeps? and how many quarts do I need?
thanks
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Old 12-13-2011, 09:50 AM   #79
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Page 511 of the 2011 owners manual - 5W-20
Page 518 of the 2012 owners manual - 5W-30

I wonder how many Jeeps had the wrong oil put in them during the first change? I also wonder if early 2012 manuals (the ones that had 3.8 listed) still had 5W-20 listed.
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Old 12-13-2011, 07:31 PM   #80
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Originally Posted by Overtrained View Post
I think everyone is getting all excited over nothing here. Don't forget the hood isn't insulated either, your going to hear some engine noise.
Yeah, I'm thinking (hoping) you're right...4300+ miles on my Pentastar and it has made those noises all along. It hasn't burned any oil, either.
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Old 12-14-2011, 05:22 AM   #81
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Page 511 of the 2011 owners manual - 5W-20
Page 518 of the 2012 owners manual - 5W-30

I wonder how many Jeeps had the wrong oil put in them during the first change? I also wonder if early 2012 manuals (the ones that had 3.8 listed) still had 5W-20 listed.

The fill cap clearly states 5W30, for the 2012 Wrangles with the Pentastar engine. The 2011 GC uses 5W30, so there really should be no confusion at all when it comes to the Pentastar engine.

The 2011 3.8L calls for 5W20, but that's a different animal. Still leave it to the powers that be to confuse the public by copying and pasting from prior year OMs.
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Old 12-14-2011, 06:31 PM   #82
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Originally Posted by panthermark View Post
Page 511 of the 2011 owners manual - 5W-20
Page 518 of the 2012 owners manual - 5W-30

I wonder how many Jeeps had the wrong oil put in them during the first change? I also wonder if early 2012 manuals (the ones that had 3.8 listed) still had 5W-20 listed.
makes total sense now. and i know later model first gen liberty's take 20 weight as well.
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Old 12-14-2011, 09:20 PM   #83
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You asked for it so welcome to the world of "higher" performance engines. With aggressive cam ramp rates and different piston to wall clearances, you are going to hear more noises at startup and light throttle conditions. Itís been this way for the LS community for a decade now. Anybody here own something with the GM 8.1L motor
I have two of the GM 8.1s in my boat, they have always been perfectly quiet when you start them. They set for weeks at a time though.
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Old 12-22-2011, 10:08 AM   #84
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1120 miles on mine - had the first oil change at 600. I bought two vehicles the same night, my jeep and a new town and Country. The 3.6 in the van with the hood up, whisper quiet. I can clearly hear the injectors firing. The 3.6 in the Jeep, louder than hell on the drivers side. Sounds like a lifter bleeding down and pumping up, but never all the way gone. Had the tech I deal with at the stealership listen to it. His response? "That sh&t ain't right!" After the holidays I'll be giving it to them for a day. The 5w20 issue makes me wonder though.....
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Old 12-22-2011, 10:54 AM   #85
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1120 miles on mine - had the first oil change at 600. I bought two vehicles the same night, my jeep and a new town and Country. The 3.6 in the van with the hood up, whisper quiet. I can clearly hear the injectors firing. The 3.6 in the Jeep, louder than hell on the drivers side. Sounds like a lifter bleeding down and pumping up, but never all the way gone. Had the tech I deal with at the stealership listen to it. His response? "That sh&t ain't right!" After the holidays I'll be giving it to them for a day. The 5w20 issue makes me wonder though.....
swap out the oil your self. Most likely its oil weight, I've seen it happen on many cars. Never let someone tell you "any oil weight" or "5w30 5w 20 are same thing" because they aren't. Oil weight is not only due to the tolerance in the motor but also drainage.
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Old 12-22-2011, 11:07 AM   #86
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You asked for it so welcome to the world of "higher" performance engines. With aggressive cam ramp rates and different piston to wall clearances, you are going to hear more noises at startup and light throttle conditions. Itís been this way for the LS community for a decade now. Anybody here own something with the GM 8.1L motor
The 5.7 LS engine in my vette sounds like a damn sewing machine but will turn out 11.8's in the 1/4 np. I can live with the noise
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Old 12-22-2011, 11:39 AM   #87
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The 5.7 LS engine in my vette sounds like a damn sewing machine but will turn out 11.8's in the 1/4 np. I can live with the noise
Yup, my Trans am with the LS sounded like that too!
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Old 12-22-2011, 11:40 AM   #88
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I had the same problem with my Cosmos JKUR. Loud ticking noise from the driver's side of the engine. I have been dealing with the dealer and Chrysler to get them to fix it. My story is complicated because we had a 2011 JKUR repurchased due to lemon law, so the dealer doesn't want to touch our 2012. They keep saying it is normal. Solution: I traded the Cosmos off on Tuesday for a 2012 white JKUR at another dealership! My wife loves the color and I don't have to fight with Chrysler or the other dealership. Heading out today to pick it up. It is having a Daystar 2'' leveling kit put on before pick up today. This makes for a third JKUR in 2011. Going to go with AEV Pintlers or Pro Comp 7089s in black. It cost me 3600.00 to trade a 12 for a 12, but well worth not having to fight the dealership and listen to tick tick tick all of the time. BTW I changed the oil myself and used 5w-30. It didn't make a difference. To me it sounds more like an exhaust leak, but it could be lifter related too.
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Old 12-23-2011, 05:40 AM   #89
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^^ Trading in a 2012 for a 2012, that's one way of eliminating dealing with the noise problem you had.^^
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Old 12-23-2011, 07:48 AM   #90
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I'm wondering if the noise from the 3.6 just might be the cam chains. There are two of them and they are quite long. This could also be the three second tick someone is hearing. One full revolution of the chains is about the only thing that takes three seconds at a ~600 rpm idle. Oil viscosity will change idle noises significantly.

My 2012 JKUR sits in a heated garage and never really sits outside not running long enough to cool off completely. It still has some pretty significant noise at startup but is often not started for ten days at a time. The oil has all drained down by this time.

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