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Am I mistaken or does the journel appear to have suffered some damage too?

But do we agree the OP's cam bearing journel was badly scored? Can someone explain that?

I wonder if oiling issues are at the heart of most of the cam/lifter issues.

Right what could bleed off nearly all head pressure? I'd like to see the other bank. Hard to imagine only one head lost oil supply. Hard to imagine only heads lost pressure. Whats the bottom end looks like?

Well that suggests an oiling issue doesnt it?

Between the two sets of lobes its that a discolored bearing journel ?

To clarify Im speaking of the MT where throttle response during shifting is very annoying.

True that. Wonder how the Cherokee would feel with the 3.6. Be interesting.

This is why I save every filter. If something starts to break down it will be catching some of the particles. Most of the dealers drain oil into a big drum, not a pan, so they are not likely to spot the onset of a problem. Id want to see the oil in a pan and check recesses in the filter...

Our pump is electric :) Fancy huh.

Of course the 3.6 has more power where we rarely need it. OTOH the 4.0 has more power exactly where its needed. I guess its our fault for paying any attention whatsoever to HP numbers. Useless information. We say this all the time in racing: HP sells torque wins. It would be interesting...

I suspect the primary reason for it is to supplement vacuum when ESS is active. Been super cool though if it was purely hydraulic, tapped into the power steering pump.

Why That would be my entire question.

Was that pump engine driving or electric? The 2003 Ram diesel has a pump driven PS/PB system. No start/stop on that tank.

Ha I took the 2001 4.0 Cherokee out earlier this evening. The is just no comparison in throttle respnse. The ole 4.0 has explosive response and loads of torque right where its needed. The whole jeep torques over when you punch it. I dont get how the 3.6 with its fancy valve train lost so...

I was thinking it was electro-hydraulic until I noticed the vacuum diaphram. I had an 80s Alfa that was electro-hydraulic. No vacuum. I think some Buicks had the same setup.

5 minutes? Thats Tesla range :)

This is an old thread but I can tell you the old 80s type cats get plugged up. I had a SHO Tarus, Mercedes 190e-16v and Porsche 951 that all had very plugged cats. I suspect that is where the cat delete trend got started. LIkely the new cats are far better considering the EPA millage requirements.

My late 2021 mfg MT Mojave stock gets 17 if I hammer it around town. Usually 19. Hwy 19-23 depending on speed. 75 it drops 18 but at ~7000 alt on I25 its back to 23. Thin air makes a difference. Anyone have the Livernois setup?

Is 22.1 both discs? Hows the six puck compare? (not really a truck disc I know).