Has anyone heard of the 3.6 cracking heads?

[SteveInOrlando]

Just curious! Looking at videos on you tube and heard a mechanic go on about heads cracking on dodge/Jeep 3.6 Pentastar engines. I haven’t seen that complaint here. Has anyone else heard of cracked heads as a problem for these engines?

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[ShadowsPapa]

Nope. Maybe they are referring to the very early 3.6 heads.
I've bot seen and complaints here or in other Jeep forums.

Be VERY careful of so much of the BS you see on youtube. Sometimes people go nutsy over something that isn't a big deal but they make it one for clicks.
Also check for the year of the video, the year of the engines he's griping about and some real solid information.

 

[ShadowsPapa]

Here ya go - gen 1, early engines. Long long ago, issue long since resolved years ago.


The cracked left-cylinder head issue potentially affects about 0.5-percent of vehicles equipped with the 3.6-liter V-6.
roughly 7500 engines built as the Pentastar V-6 was first coming out in 2012, were found to be susceptible to left-cylinder head cracks, A design modification in late 2012 has reportedly fixed the issue in newer vehicles.

the article is from:
Jun 16, 2014

So it's from engines built a decade ago.

That guy should edit his video or pull it down.

 

[Barnaby’sdad]

Here ya go - gen 1, early engines. Long long ago, issue long since resolved years ago.


The cracked left-cylinder head issue potentially affects about 0.5-percent of vehicles equipped with the 3.6-liter V-6.
roughly 7500 engines built as the Pentastar V-6 was first coming out in 2012, were found to be susceptible to left-cylinder head cracks, A design modification in late 2012 has reportedly fixed the issue in newer vehicles.

the article is from:
Jun 16, 2014

So it's from engines built a decade ago.

That guy should edit his video or pull it down.

Yup. Good find. 0.5% of 7,500 vehicles. That’s 37 engines.

 

[ShadowsPapa]

roughly 7500 engines built as the Pentastar V-6 was first coming out in 2012, were found to be susceptible to left-cylinder head cracks,

Yup. Good find. 0.5% of 7,500 vehicles. That’s 37 engines.

7500 isn't the TOTAL, it's the few found to be susceptible to the crack. Many thousands more were made. So it's 0.5% of the total and of that total 7500 were susceptible but of those not all got the crack.
We don't know how many had been made by the time that the subset of 7500 were found to be susceptible - could be 70,000 had been made by that time.

 

[Barnaby’sdad]

7500 isn't the TOTAL, it's the few found to be susceptible to the crack. Many thousands more were made. So it's 0.5% of the total and of that total 7500 were susceptible but of those not all got the crack.
We don't know how many had been made by the time that the subset of 7500 were found to be susceptible - could be 70,000 had been made by that time.

Ok, so ~370 vehicles.

Going to go out on a limb and guess that the number of 3.0 Eco-Diesel fuel systems that have FOD’d out exceed that number.

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