Another cam bites the dust

[roaniecowpony]

How many miles on that engine?

He covers all the details in the first post of this thread, including the type of oil.

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[KCSgtMaj]

He covers all the details in the first post of this thread, including the type of oil.

Yeah, just been a while. This post ding my email this morning.

 

[Chupacabra]

I have some first-hand experience to the contrary with the LP masonite siding, it did not make us whole but it was a sizeable chunk to help with the bill to do the house with Hardie plank.

Hah! I remember that. The wax bleed-through issue with that siding? I made a claim because I had horrible bleed through above the shingles. They denied it saying that the siding had been installed "too close to the ground". Like how does that impact siding 20 feet in the air? What a joke.

 

[Dirtflirt]

Hah! I remember that. The wax bleed-through issue with that siding? I made a claim because I had horrible bleed through above the shingles. They denied it saying that the siding had been installed "too close to the ground". Like how does that impact siding 20 feet in the air? What a joke.

You would think that the industry would have learned its lesson but noooo, here comes the latest round of particle board siding that is the cat's ass because it comes painted, and to top it off they are calling it smart siding. What a fricking joke.

 

[Magredvet]

OK, so these are the new redesigned Gen 2 intake lifters that are about $100 a piece, and it is still happening ? I don't have a Pentastar in the Jeep, but do have one in my Class B, which sits a lot, so this does not make me feel good for it's longevity...................

 

[USAFREODRetired]

OK, so these are the new redesigned Gen 2 intake lifters that are about $100 a piece, and it is still happening ? I don't have a Pentastar in the Jeep, but do have one in my Class B, which sits a lot, so this does not make me feel good for it's longevity...................

Yes, they are. So frustrating!

 

[Old Jeeper]

55,000 miles in on my 2018 JLUR with 3.6 and towing my 'squaredrop' over the high mountain passes here in Colorado at highway speeds (long runs at high revs under load), I really felt there were some problems with the motor. Just got the report from my shop, sure enough I've got cam damage.

Religious about oil changes, only run full syn (usually Amsoil) factory spec.

Must have been going bad for a while, but damn.

GOOD WTF GRIEF!

My first car with Hydraulic lifters was in 1974, before that all I drove was Corvettes (4) Solid lifters, HiPerf engines, revving to 7000 + RPM and I was racing them on weekends. Never had a cam failure (or any engine failure other than some broken valve springs, about 6 of them over the years in my 427 engine).

To say that I am shocked at this failure in any engine, especially the Jeep 3.6 would be an understatement. Cam failure is RARE on any engine...

Stellantis never seems to miss an opportunity to disappoint... TJ, the LAST of the REAL JEEPS!

 

[NPC 20883467]

GOOD WTF GRIEF!... To say that I am shocked at this failure in any engine, especially the Jeep 3.6 would be an understatement. Cam failure is RARE on any engine...

Stellantis never seems to miss an opportunity to disappoint... TJ, the LAST of the REAL JEEPS!

Indeed... Used to be you babied your car & doubled up on oil changes because you wanted to make it past 200K miles. Late model Jeep people do the same with the faint hope they'll get to 60K.

(Just noticed a faint lifter click on the passenger side yesterday... '20 Sport w/ 16K miles FFS.)

 

[roaniecowpony]

GOOD WTF GRIEF!

My first car with Hydraulic lifters was in 1974, before that all I drove was Corvettes (4) Solid lifters, HiPerf engines, revving to 7000 + RPM and I was racing them on weekends. Never had a cam failure (or any engine failure other than some broken valve springs, about 6 of them over the years in my 427 engine).

To say that I am shocked at this failure in any engine, especially the Jeep 3.6 would be an understatement. Cam failure is RARE on any engine...

Stellantis never seems to miss an opportunity to disappoint... TJ, the LAST of the REAL JEEPS!

What's changed?

These little overhead cam engines have a fraction of the valve spring pressures of a pushrod 427. So that's not it.

The metallurgy of cams and lifters has a lot of history. So, it's unlikely that's a problem. Although we can't rule out a quality control issue.

The kinematics of the VVL intake rocker, specifically the high lift rub block, seems to be unique. Possibly, the activation of the high lift mode creates a very high specific loading on the face of the cam and rocker rub block.​

 

[58Willys]

What's changed?

These little overhead cam engines have a fraction of the valve spring pressures of a pushrod 427. So that's not it.

The metallurgy of cams and lifters has a lot of history. So, it's unlikely that's a problem. Although we can't rule out a quality control issue.

The kinematics of the VVL intake rocker, specifically the high lift rub block, seems to be unique. Possibly, the activation of the high lift mode creates a very high specific loading on the face of the cam and rocker rub block.​

Maybe there is simply insufficient oiling for the VVL high lift mode.

 

[hilljumper]

That's alawy

Hah! I remember that. The wax bleed-through issue with that siding? I made a claim because I had horrible bleed through above the shingles. They denied it saying that the siding had been installed "too close to the ground". Like how does that impact siding 20 feet in the air? What a joke.

That's a lawyer talking!

 

[hilljumper]

55,000 miles in on my 2018 JLUR with 3.6 and towing my 'squaredrop' over the high mountain passes here in Colorado at highway speeds (long runs at high revs under load), I really felt there were some problems with the motor. Just got the report from my shop, sure enough I've got cam damage.

Religious about oil changes, only run full syn (usually Amsoil) factory spec.

Must have been going bad for a while, but damn.

If this were the case then wouldn't EVERY 2018 JLUR have the same problem?

 

[Old Jeeper]

What's changed?

These little overhead cam engines have a fraction of the valve spring pressures of a pushrod 427. So that's not it.

The metallurgy of cams and lifters has a lot of history. So, it's unlikely that's a problem. Although we can't rule out a quality control issue.

The kinematics of the VVL intake rocker, specifically the high lift rub block, seems to be unique. Possibly, the activation of the high lift mode creates a very high specific loading on the face of the cam and rocker rub block.​

What I see is many mfgs are trying to fix something that is NOT broke! Camshaft and rocker arms are not new science here folks, noting to see here, it works and works up to 7000+ rpm and lets see: 64 Corvette, 327, 375 Hp solid lifters, sold at 103XXX miles, 69 427 450 Hp solid lifters, sold at 169,XXX miles.

But Jeep has a better solution and better way...to your wallet!

 

[Old Jeeper]

Indeed... Used to be you babied your car & doubled up on oil changes because you wanted to make it past 200K miles. Late model Jeep people do the same with the faint hope they'll get to 60K.

(Just noticed a faint lifter click on the passenger side yesterday... '20 Sport w/ 16K miles FFS.)

Lifter click: WOW was I happy when Chevy moved to HiPerf Hydraulic lifters. So somehow the Bowtie boys and the folks over at Mustang Ville and others have designed a Hydraulic lifter that will work way beyond 7k all day. But Jeep cannot pull it off on an engine they have been making for more than 2 weeks.

It just seems that Jeep is not hitting on all cylinders and their CAN Bus which is a CANNOT Bus...

 

[Deleted User 38384]

This right here is a prime example of why I always practice the mindset of: QUESTION EVERYTHING.

FCA is in the business of making money.

EPA is in the business of restricting citizens for whatever they deem beneficial for the environment.

You need to decide what's best for your engine in your environment, because not everyone has your best interest like you do.

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