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Old 11-14-2012, 05:20 AM   #3451
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Originally Posted by demarpaint

Maybe so, certainly the more time that goes by w/o complaints the greater the likelihood the problem has been fixed. So far so good! Any idea at what point the 2013's changed over to the AC head? Aren't there a few complaints of 2012's with the AB head swap still having the tick?
Are those issues due to the head or due to issues the previously faulty head caused that haven't been diagnosed?

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Old 11-14-2012, 06:49 AM   #3452
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My 2012 2dr sport s had the same loud ticking noise and when I took it to the dealer here in my town they told me there was nothing wrong and sent me on my way. Since then I have traded my Jeep for a 2013

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Old 11-14-2012, 07:50 AM   #3453
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Are those issues due to the head or due to issues the previously faulty head caused that haven't been diagnosed?
I just got back from my Jeep dealer for my 5 year inspection to keep the lifetime warranty intact for my Liberty. I had gotten there early and got the nicest service writer I've ever encountered and got to chat with him and a tech about the Pentastar issue.

Here's what I was told. First Chrysler never explained the root cause of the problem to them either. Early on the Pentastar had some cam phaser problems as well as the bad head. They were replacing AA heads with AA heads, several came back with the same problem. However not all Pentastar engines are having the problem, many don't have the tick, but still throw a CEL, fail a leak down test, and need a head replacement. The AB head had some improvements to the valve guides and better coolant flow through the head. The AC head was an improvement to the AB head. They now use a different valve guide and even better coolant flow. Bottom line in this tech's opinion, is bad coolant flow in the original design head caused excess heat which distorted the valve guide and caused the misfire. He thinks there is now an AD head, although he wasn't 100% certain because he hasn't swapped any heads in a few weeks. He was going to check with the parts guy on a break but I couldn't wait around. He hasn't seen a 2013 with the problem, but many early units do have the AB head. He's also replaced 1 right cylinder head on a 2012 Wrangler. Take it FWIW.

Those of us who said it was a heat issue were right according to this tech.
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Old 11-14-2012, 09:32 AM   #3454
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That wasn't what I was asking. But thanks, I guess?
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Old 11-14-2012, 10:05 AM   #3455
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Quote:
Originally Posted by demarpaint View Post
I just got back from my Jeep dealer for my 5 year inspection to keep the lifetime warranty intact for my Liberty. I had gotten there early and got the nicest service writer I've ever encountered and got to chat with him and a tech about the Pentastar issue.

Here's what I was told. First Chrysler never explained the root cause of the problem to them either. Early on the Pentastar had some cam phaser problems as well as the bad head. They were replacing AA heads with AA heads, several came back with the same problem. However not all Pentastar engines are having the problem, many don't have the tick, but still throw a CEL, fail a leak down test, and need a head replacement. The AB head had some improvements to the valve guides and better coolant flow through the head. The AC head was an improvement to the AB head. They now use a different valve guide and even better coolant flow. Bottom line in this tech's opinion, is bad coolant flow in the original design head caused excess heat which distorted the valve guide and caused the misfire. He thinks there is now an AD head, although he wasn't 100% certain because he hasn't swapped any heads in a few weeks. He was going to check with the parts guy on a break but I couldn't wait around. He hasn't seen a 2013 with the problem, but many early units do have the AB head. He's also replaced 1 right cylinder head on a 2012 Wrangler. Take it FWIW.

Those of us who said it was a heat issue were right according to this tech.
Very interesting.
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Old 11-14-2012, 10:45 AM   #3456
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these engines do run hot. You would think the coolant would be pumped symmetrically to both heads though. The drivers side has more of an air gap than the passenger side so you'd also think that the drivers side would have the potential to run cooler. Maybe it is that loop in the exhaust generating heat lol
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Old 11-14-2012, 11:11 AM   #3457
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Driver's side also has the big chunk of foam over the valve cover.
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Old 11-14-2012, 11:29 AM   #3458
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I personally think those foam pieces are there strictly for noise reduction, even with the engine cover off the engine is quite a bit louder.
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Old 11-14-2012, 11:46 AM   #3459
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Just had my driver's side head replaced. The symptoms of mine have been all over the place. Some days it would tick, some days it wouldn't, MPG was all over the place. What prompted me to take it in this time was consistent 8-10 MPG over the course of a few tanks of gas. Ticking was pretty loud when I finally had it in. Here's what they replaced. Only took the dealer two days. This thing is very quiet now and runs so much smoother. Also, I never had a check engine light and the dealer still took care of me and opened the star case to fix the jeep.

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Old 11-14-2012, 11:56 AM   #3460
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Just had my driver's side head replaced. The symptoms of mine have been all over the place. Some days it would tick, some days it wouldn't, MPG was all over the place. What prompted me to take it in this time was consistent 8-10 MPG over the course of a few tanks of gas. Ticking was pretty loud when I finally had it in. Here's what they replaced. Only took the dealer two days. This thing is very quiet now and runs so much smoother. Also, I never had a check engine light and the dealer still took care of me and opened the star case to fix the jeep.

What! Our jeeps have phasers? Who knew
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Old 11-14-2012, 12:19 PM   #3461
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That wasn't what I was asking. But thanks, I guess?
You're welcome I guess.

I really don't have an answer to your question. I just posted what I learned today hoping it would answer you.
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Old 11-14-2012, 12:24 PM   #3462
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There were 2 people that complained about ticking with recent (august/sept) head replacements. But, when asked for details/part #s multiple times they did not respond and disappeared. I think one even said there was no part number on the repair summary... It was also odd that they both happened to post in the same thread at almost the same time with the same problem. Makes you wonder.
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Old 11-14-2012, 12:48 PM   #3463
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Yeah well my 2012 was built December 7th, 2011.

Had it in for misfire once..."we did a computer update and that shoulda fix the problem."

Three new recordings of a misfire only weeks after the computer update.

We'll see what kind of bullshit they pull this time....

So pissed
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Old 11-14-2012, 01:03 PM   #3464
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Yeah well my 2012 was built December 7th, 2011.
My build date was also December of 2011 and now have 12,000 miles. Maybe just call Chrysler directly and have them work with your dealer? I did that before I even took in my jeep this time because of all the stories I've read on this forum. Chrysler comped the rental directly instead of fighting with the dealer over details like that.
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Old 11-14-2012, 01:07 PM   #3465
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Just had my driver's side head replaced. The symptoms of mine have been all over the place. Some days it would tick, some days it wouldn't, MPG was all over the place. What prompted me to take it in this time was consistent 8-10 MPG over the course of a few tanks of gas. Ticking was pretty loud when I finally had it in. Here's what they replaced. Only took the dealer two days. This thing is very quiet now and runs so much smoother. Also, I never had a check engine light and the dealer still took care of me and opened the star case to fix the jeep.

Is yours a 2012 or 13? I see they listed 5W30 oil. There is another thread discussing the difference in oil from 2012 pentastar to 2013.

Oops I saw you have a 2012 after I posted. 5w30 is correct for it.
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Old 11-14-2012, 01:11 PM   #3466
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Is yours a 2012 or 13? I see they listed 5W30 oil. There is another thread discussing the difference in oil from 2012 pentastar to 2013.
2012, build date December 2011, 12,000 miles.
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Old 11-14-2012, 01:23 PM   #3467
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Is yours a 2012 or 13? I see they listed 5W30 oil. There is another thread discussing the difference in oil from 2012 pentastar to 2013.
2012... Im using the type of oil on the oil cap and what he manual says. So if they try to say that has something to do with it....THEY'RE DEAD WRONG.
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Old 11-14-2012, 01:41 PM   #3468
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2012... Im using the type of oil on the oil cap and what he manual says. So if they try to say that has something to do with it....THEY'RE DEAD WRONG.

2012 Calls for 5W30 as per the OM and the fill cap. The 2013 calls for 5W20 as per the OM and fill cap. The problem is not oil related and they can't possibly blame the oil in this instance.
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Old 11-14-2012, 01:52 PM   #3469
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2012 Calls for 5W30 as per the OM and the fill cap. The 2013 calls for 5W20 as per the OM and fill cap. The problem is not oil related and they can't possibly blame the oil in this instance.
You're right....they will probably try to tell me that the cb antenna added more weight to the Jeep which caused the engine to tick....or blame the low blinked fluid. Hahahah
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Old 11-14-2012, 01:52 PM   #3470
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2012... Im using the type of oil on the oil cap and what he manual says. So if they try to say that has something to do with it....THEY'RE DEAD WRONG.
--------
No I don't think they would.

When I was reading his work order, I did not know what year his Wrangler was. I would have thought it curious that they put 5w30 in a 2013. It turns out it was a 2012.

I just find it strange that the driver's side head problem occurs on 2012 models then they change oil from 5w30 to 5w20 in 2013. Is there any difference in the 2013 pentastar that requires this?

The 1st is from the 2012 manual the 2nd 2013:
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Old 11-14-2012, 02:01 PM   #3471
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That is interesting. anyone have thought on switching to 5w20 for the 2012s? Or would that mess things up or give them more excuses
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Old 11-14-2012, 02:04 PM   #3472
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No I don't think they would.

When I was reading his work order, I did not know what year his Wrangler was. I would have thought it curious that they put 5w30 in a 2013. It turns out it was a 2012.

I just find it strange that the driver's side head problem occurs on 2012 models then they change oil from 5w30 to 5w20 in 2013. Is there any difference in the 2013 pentastar that requires this?

The 1st is from the 2012 manual the 2nd 2013:
The only change to the 2013 is the improved cylinder head. The change to 5W20 oil is all CAFE driven. I had that discussion with my new friends at my Jeep dealer today.
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Old 11-14-2012, 02:05 PM   #3473
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That is interesting. anyone have thought on switching to 5w20 for the 2012s? Or would that mess things up or give them more excuses
I am sticking with what is on the oil cap and in the owner's manual unless Fiat Chrysler tells me (in writing) to change. I am doing this to maintain the warranty.
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Old 11-14-2012, 02:07 PM   #3474
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The only change to the 2013 is the improved cylinder head. The change to 5W20 oil is all CAFE driven. I had that discussion with my new friends at my Jeep dealer today.
How much difference in MPG could that possibly cause? If less than 2 mpg, I would think there is something else going on unless of course the 5w20 is somehow more environmentally friendly than 5w30.
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Old 11-14-2012, 02:10 PM   #3475
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I am sticking with what is on the oil cap and in the owner's manual unless Fiat Chrysler tells me (in writing) to change. I am doing this to maintain the warranty.
I let the dealer do all my service... for all my cars, as they should know best. LOL
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Old 11-14-2012, 02:36 PM   #3476
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How much difference in MPG could that possibly cause? If less than 2 mpg, I would think there is something else going on unless of course the 5w20 is somehow more environmentally friendly than 5w30.
You'd probably never be able to calculate the difference, but CAFE applies to the gas savings for the bulk of the Chrysler lineup. If a million of their cars save 3 gallons of gas a year it adds up lol.
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Old 11-14-2012, 02:37 PM   #3477
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I am sticking with what is on the oil cap and in the owner's manual unless Fiat Chrysler tells me (in writing) to change. I am doing this to maintain the warranty.

Smart move while under a warranty.
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Old 11-14-2012, 02:50 PM   #3478
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I have a 2012 JKUR and just took it in on Monday for its first oil change. They put 5W 20 in mine and the full cap says 5W 30; the dealership also switched oil brands from Pennsoil to Valvoline! Don't know what to think of the brand change!!! Got 3800 miles on mine with no ticking issues...so far so good!
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Old 11-14-2012, 03:17 PM   #3479
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I have a 2012 JKUR and just took it in on Monday for its first oil change. They put 5W 20 in mine and the full cap says 5W 30; the dealership also switched oil brands from Pennsoil to Valvoline! Don't know what to think of the brand change!!! Got 3800 miles on mine with no ticking issues...so far so good!
all name brand oil today is good oil. I would not worry about either the brand change or the viscosity change.
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Old 11-14-2012, 05:33 PM   #3480
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If you have a choice between 5W-20 and 5W-30, go with the 5W-30. In fact, even better would be 0W-30 for cold weather starting. The lighter 5W-20 oil is for CAFE, not the longetivity of your engine past the warranty period.

Valvoline Premium Conventional oil is a good product. In fact it has a lower pour point than Castro Edge with Syntec in the 5W-30 grade (-42C versus -39C). Go figure.

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