3.6 Engine Tick

[Chris Blake]

The current generation with VVL doesn't have that same roller and bearing setup.
What is failing on these is the high lift portion of the rocker or follower. There's no bearings involved.
And the cam is damaged right away. When these fail, the current generation with VVL - it's the rocker and cam that are both damaged at the same time. There's no fixing a bearing and saving the cam.

Oil viscosity has nothing to do with this. Likely you ended up with oil that has a better film protection - can handle higher pressure.
Just because you had no other problems doesn't prove the oil fixed it because many thousands don't ever have the problem.

This is not a viscosity issue - check back at all of the posts and pictures of this and the diagrams I've supplied.
The damage is on the portion that operates more like a flat tappet cam setup.

This is the cam damage-

This is the follower damage - not related to any bearing at all - when it's damaged it's trash -

Thank you for the reply. Most of the online videos are on the older version of the engine. I noticed the part numbers not mating up on the Mopar site. The only way to see if this is the problem (to my knowledge) is to break it down and look. Are there any other ways to chase this? Previously on a post, you said something about sending oil off for testing to see if there is metal in the oil but that doesn't guarantee it's the cam. I just don't understand how the noise can come and go without any real pattern at all. I hit a bump in the road the other day and it went away for 10 sec then came back.

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[Chris Blake]

Warranty time.

Warranty is out I'm at 52k on motor

 

[Hootbro]

Warranty is out I'm at 52k on motor

Powertrain is up to 60K. This would be a powertrain warranty issue.

 

[Chris Blake]

Powertrain is up to 60K. This would be a powertrain warranty issue.

Learned something thanks, Calling dealer tomorrow.

 

[Escape.idiocracy]

Yeah, but what caused the updated cam and follower to get trashed? Poor quality metal or construction to begin with?

Probably all the issues with the previous generation eating rocker bearings.

 

[kscoke]

I have had the Camshaft/Rockers and Lifters replaced twice under 5000 miles. Last work done 2 weeks ago and getting load again.

 

[jwolfejt]

Yeah, but what caused the updated cam and follower to get trashed? Poor quality metal or construction to begin with?

My understanding this is a assembly snafu - the new VVL engines use a different lifter on the intake side (VVL) many have found that they just used exhaust side lifters everywhere - which will cause this. The first gen VTEC engines used this type of rocker arrangement where there was no roller on the rocker (as is the case for the intake rockers on this new VVL engines at least for the high lift side IIRC) and those engines last easily 100s of thousands of miles so I don't think its a design flaw per say.

 

[jwolfejt]

I can’t help or give any advice but you prompted me to go check my engine too. Sounds like mine is ticking as well. I don’t think I can hear it while on the road though.

21k miles

This sounds totally normal to me.

 

[jwolfejt]

I just got a tick in the last month and its getting worse. I hear it at slower speeds and the sound goes away sometimes. Yesterday I hit a bump in the road and it went away for a couple seconds then came back. Any thoughts? 2020 LE with 52k on motor

That is definitely valvetrain chatter and you need to get it repaired ASAP. Ask them to keep the lifters and cam for you after the repair - i am curious as to how many of these were just assembled with the incorrect lifters.

 

[Chris Blake]

Ask them to keep the lifters and cam for you after the repair

Yes Indeed, put her in the shop today and wait for diagnostics.

 

[jwolfejt]

Yes Indeed, put her in the shop today and wait for diagnostics.

Keep us posted as I am curious - i am willing to bet that they put the wron glifters on the intake side - almost every story i've seen of this has been just this case.

 

[ShadowsPapa]

My understanding this is a assembly snafu - the new VVL engines use a different lifter on the intake side (VVL) many have found that they just used exhaust side lifters everywhere - which will cause this. The first gen VTEC engines used this type of rocker arrangement where there was no roller on the rocker (as is the case for the intake rockers on this new VVL engines at least for the high lift side IIRC) and those engines last easily 100s of thousands of miles so I don't think its a design flaw per say.

Rollers on low-lift side of rocker only. Low lift operates up to 2800 rpm so they don't expect much time spent on the high lift side.

 

[jwolfejt]

Rollers on low-lift side of rocker only. Low lift operates up to 2800 rpm so they don't expect much time spent on the high lift side.

True, but there are a number of reports of FCA installing lifters from the exhaust side on the intake/VVL cam and they are wildly different which would explain the failures.

 

[ShadowsPapa]

True, but there are a number of reports of FCA installing lifters from the exhaust side on the intake/VVL cam and they are wildly different which would explain the failures.

That's what I've been saying if you look back at my other posts in the other areas...........
I also today said they didn't expect the intake to spend time on the high lift side of things - and why are they spending time on the high lift side? This -
The incorrect lash adjusters (not lifters - these don't have lifters) being installed for the intake valves being one of the reasons these have trouble.
I've gone into a lot of detail with the images and been following this for a couple of years.

You'll see what I posted about it here -
https://www.jeepgladiatorforum.com/...-roots-supercharger.54832/page-14#post-990691

 

[jwolfejt]

That's what I've been saying if you look back at my other posts in the other areas...........
I also today said they didn't expect the intake to spend time on the high lift side of things - and why are they spending time on the high lift side? This -
The incorrect lash adjusters (not lifters - these don't have lifters) being installed for the intake valves being one of the reasons these have trouble.
I've gone into a lot of detail with the images and been following this for a couple of years.

You'll see what I posted about it here -
https://www.jeepgladiatorforum.com/...-roots-supercharger.54832/page-14#post-990691

Thanks for the clarification.

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