Report your 3.6L Pentastar's mileage

2021 Jeep Wrangler Sport S
31,000 miles
Mobil 1 ESP 0W30
Carquest Premium oil filter

IMG_5832.webp
 
2020 ProMaster 2500

81,000 miles.

Did intake cam/rockers/lash adjusters on bank 1 and exhaust cam and accessories on bank 2.

Had only planned on oil filter adapter as it was leaking. Noticed valve cover Gaskets starting to weep, so pulled those and saw cam lobes with this wear. Easy job, just time consuming, especially on this nearly cab-over van.
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The failures are due to poor design of the early rockers and the top-end is very sensitive to oil supply issues. I think that oil filter housing could be part of the issue because it supplies oil directly to the top-end. Issues there = issues at the rocker. The rocker has been through several revisions as has the oil filter housing. If you own one of the later ones your odds are much better but inspect that valley between the cylinders and if you find oil or coolant, do not delay fixing it. I'd check it with a borescope or mirror every time you change the oil.

Dodge Grand Caravan 2016 - 94,000 miles
RAM 1500 2023 - 49,000 miles
 
kevperro said:
The failures are due to poor design of the early rockers and the top-end is very sensitive to oil supply issues. I think that oil filter housing could be part of the issue because it supplies oil directly to the top-end. Issues there = issues at the rocker. The rocker has been through several revisions as has the oil filter housing. If you own one of the later ones your odds are much better but inspect that valley between the cylinders and if you find oil or coolant, do not delay fixing it. I'd check it with a borescope or mirror every time you change the oil.

Dodge Grand Caravan 2016 - 94,000 miles
RAM 1500 2023 - 49,000 miles
Click to expand...

I agree about the rockers, but not the oil supply. When I did my rockers, I turned the engine by hand to ensure timing didn't skip and the oil was squirting out onto the rockers and the cams even then. I also didn't see any signs of lubrication issues, like heat discoloration or scoring on the rollers. The needle bearings inside the rollers fail, by eating into the shaft.

This is where it starts

images.webp
 
KrisZ said:
I agree about the rockers, but not the oil supply. When I did my rockers, I turned the engine by hand to ensure timing didn't skip and the oil was squirting out onto the rockers and the cams even then. I also didn't see any signs of lubrication issues, like heat discoloration or scoring on the rollers. The needle bearings inside the rollers fail, by eating into the shaft.

This is where it starts

View attachment 308593
Click to expand...

Well, seeing how many revisions RAM engineers have run through, I don't think the solution is an easy one that is due to a single variable. It probably has multiple compounding issues that can lead to failure. But I'm just spit-balling. I'm just some guy on the internet giving free advice and you get what you pay for.
 
KrisZ said:
I agree about the rockers, but not the oil supply. When I did my rockers, I turned the engine by hand to ensure timing didn't skip and the oil was squirting out onto the rockers and the cams even then. I also didn't see any signs of lubrication issues, like heat discoloration or scoring on the rollers. The needle bearings inside the rollers fail, by eating into the shaft.

This is where it starts

View attachment 308593
Click to expand...
Yep - As I stated in another thread - my PUG is constantly hitting high stage and 75-80 psi - far more aggressive than other makes I own/owned …
That pump is moving allot of oil …
A few others have gone round and round over so called dry start - but that housing is holding some oil - parts keeping film - and I see very fast oil delivery above the base pressure at start up …
 
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