I joined the 100,000 mile club!!

[Joe_G]

$750 labor, cam was $110 and $40ish for the lifters.

Oh good, that's less than I'd thought!

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[devnull]

18.9mpg? WOW

If I filled my tank with 1 gallon of gas, started it and let it idle, and dropped it from 18.9 miles up it would be out of gas before it hit the ground. Nice work

 

[Guns_N_Rosaries]

I did have the "tick" and replaced cams and lash adjustors at 61k miles

How much did that end up costing you? So far so good at 40k miles in a 2021, but I almost feel like this will be an inevitability.

 

[Guns_N_Rosaries]

How much did that end up costing you? So far so good at 40k miles in a 2021, but I almost feel like this will be an inevitability.

Edit: Nevermind, I saw someone else asked before I finished the thread lol

 

[Rlindlau]

2020 Sport S, 6MT. I did have the "tick" and replaced cams and lash adjustors at 61k miles, one set of dead batteries, and recently replaced the spark plugs and PCV valve. Oil changes every 5k miles.

Congrats. I also have a 2020 Sport. just broke 145K miles with nothing but oil changes, New brake pads/rotors and a buch of tires. Thinking about replacingthe shocks but, knock on wood, no real issues.

 

[Guardian682]

Well done! Keep doing what you're doing and it should last. I'm getting close to rolling over 250k on my 2020 JT and it hasn't let me down yet.

 

[yoda13]

Well done! Keep doing what you're doing and it should last. I'm getting close to rolling over 250k on my 2020 JT and it hasn't let me down yet.

That’s impressive

 

[piroman683]

nice, I'm at 108k miles with th 6MT, but now going thorugh my 4th intake cam, and replacing the left exhaust lifters and followers. Last cam replacement was right side at 100k. It is clear to me now that the engine does not like being above 3k rmp for very long, at all.

 

[Jteakus]

Well done! Keep doing what you're doing and it should last. I'm getting close to rolling over 250k on my 2020 JT and it hasn't let me down yet.

Care to share your maintenance program with the class?

 

[ShadowsPapa]

It is clear to me now that the engine does not like being above 3k rmp for very long, at all.

That's odd - around here you have little choice but to be above 3,000 RPM, sometimes for a mile or so, to get up to speed going up the ramp and then up the hill to the next town against the wind. Mine spends a lot of time over 3,000 RPM, especially when towing I let it breathe. I'd be lugging it if I tried to keep it under 3K around here.

 

[yoda13]

That's odd - around here you have little choice but to be above 3,000 RPM, sometimes for a mile or so, to get up to speed going up the ramp and then up the hill to the next town against the wind. Mine spends a lot of time over 3,000 RPM, especially when towing I let it breathe. I'd be lugging it if I tried to keep it under 3K around here.

I’m with you. Mine stays above that quite a bit with just normal daily driving.

 

[piroman683]

That's odd - around here you have little choice but to be above 3,000 RPM, sometimes for a mile or so, to get up to speed going up the ramp and then up the hill to the next town against the wind. Mine spends a lot of time over 3,000 RPM, especially when towing I let it breathe. I'd be lugging it if I tried to keep it under 3K around here.

For me, it's when I'm off-roading on fast, whooped out trails. I think it's a combination of the higher RPM's (typically dont go above 4500) and sloshing of the oil in the pan resulting in partial oil starvation. However, when keeping an eye on oil pressure it maintains 70+ psi and doesn't drop, which would then indicate a lack of oil. At the same time, you can have minimal flow while still having consistent pressure.

The first failure was right side at 58k miles - covered under warranty
Supercharger installed at 60k miles
2nd failure - left side at 76k miles
replaced engine due to lots of ground metal from both cams
3rd failure - right side at 100k miles - just after racing in Mexico - 1300 miles off road + drive home (I also blew my rear ring gear from going too fast in the whoops, but I passed the raptors in my group so for that little victory, from a manual JT, I'll take it)
4th failure - left side 108k miles - no real off-roading since the race

Something else I keep thinking about is the manual trans will transfer a lot more shock and stress into the engine vs an auto. It is easier for the torque converter to slip a little when loading up the rear axles in the whoops vs. a manual which stransfers all that stress.

Other than that, I am really stumped. At the bare minimum, if it's grinding away that tells me lack of oil, but oil has never shown to be low on fill or low on pressure....

 

[yoda13]

For me, it's when I'm off-roading on fast, whooped out trails. I think it's a combination of the higher RPM's (typically dont go above 4500) and sloshing of the oil in the pan resulting in partial oil starvation. However, when keeping an eye on oil pressure it maintains 70+ psi and doesn't drop, which would then indicate a lack of oil. At the same time, you can have minimal flow while still having consistent pressure.

The first failure was right side at 58k miles - covered under warranty
Supercharger installed at 60k miles
2nd failure - left side at 76k miles
replaced engine due to lots of ground metal from both cams
3rd failure - right side at 100k miles - just after racing in Mexico - 1300 miles off road + drive home (I also blew my rear ring gear from going too fast in the whoops, but I passed the raptors in my group so for that little victory, from a manual JT, I'll take it)
4th failure - left side 108k miles - no real off-roading since the race

Something else I keep thinking about is the manual trans will transfer a lot more shock and stress into the engine vs an auto. It is easier for the torque converter to slip a little when loading up the rear axles in the whoops vs. a manual which stransfers all that stress.

Other than that, I am really stumped. At the bare minimum, if it's grinding away that tells me lack of oil, but oil has never shown to be low on fill or low on pressure....

I have read speculation about oil pressure and I have read speculation about substandard metal in the cams and lifters. I truly have no idea. This is a widespread problem, yet it seems the vast majority of these engines don’t have problems. I know that seems contradictory, but they have sold so many.

 

[ShadowsPapa]

it maintains 70+ psi and doesn't drop, which would then indicate a lack of oil. At the same time, you can have minimal flow while still having consistent pressure.

Pressure is volume, or flow, against resistance. You can't have minimal flow and not maintain pressure. It's not possible. If there was oil starvation, you'd see the pressure fluctuate a bit due to air in the oil galleries and being compressible.
I wonder about putting an extra quart in these when running extreme angles, but if you aren't seeing a pressure drop, then you have plenty of flow. Can't have pressure without it. It's basic hydraulics.

I have read speculation about oil pressure

And that's all it is - actually not even as good as speculation - it's total guess-work, tossing stuff out to see what sticks. As long as you have pressure, the cam lobes are being lubricated. It doesn't take much pressure for the spray to hit the followers and lobes. You should see how far 20 PSI of oil pressure will shoot oil out of a V8 engine with the valve covers off. That's really all that's required because pressure does not lubricate - the oil film does.
People get hung up on pressure but really, all that's needed is 10 PSI per 1,000 RPM when building an engine - and these run a whole lot higher than that due to the phasers, dual lift followers and so on.
If you have 30 PSI, you have plenty of pressure to spray those lobes.

 

[Blackjeepjk]

105k here. No issues except normal battery replacement.
im planning to run until it stops and then swap in a V8, hopefully not until 200k

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