Anyone else have issues with their Pentastar?

[roaniecowpony]

Ive been thiking it sounds like a Kubota !! ?

It's Italian. Sounds like a Lamborghini to me.

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[blnewt]

Haven't read all the posts as this thread is a like a snowball rolling down a mountain, but OP what is your Oil Pressure over 3500 rpm, didn't see if that was mentioned before?

 

[Morrepe]

Nope.
Mine purrs like a mountain cat. And most importantly it behaves like one. My 2019 2-Door 3.6L Auto is by far the best damn vehicles I've ever owned.

So sorry yours is less than what you want or expect. I've had the exact opposite experience. I wouldn't trade in this vehicle unless the dealership made me an offer I couldn't refuse.

My idle oil pressure is always between 31 to 32 psi, no startup noises, gives me all the acceleration I could want for a Jeep even on 35's. However, I don't try to compare it to anything else. Jeeps are pretty unique and mine excels at what I want from it.

So there is at least one really phenomenal 3.6L in existence, even if it was built in Mexico.

Good luck at overcoming your troubles. Best regards.
Jay

x2. Haven't had mine long, but so far so good. And I've got the MT. I've had two JKs with the older 3.6L (one MT and one Auto) and really like that setup too, but this one's better IMHO. Sounds like OP may have just gotten a bad one? It happens, but Jeep should make good if that's the case and not give him the runaround. If it's a case of unreasonable expectation, then that can't be helped and OP just doesn't like the setup. Hard to tell which from what's up here.

 

[Dbasiliere]

I'm getting really burnt out on my JL wrangler's Pentastar engine, I have a 2022 with the 3.6L with 6 speed manual with 4000 miles and that engine has become a daily dread every time I have to cold start it. Sometimes it gets a lifter tick for 20 seconds until oil pressure builds in the lifter tappets and it has this weird idle down tapping noise off fast idle that I have been complaining about since new. Also I have noticed that after the engine has ran for a while my oil pressure will read 26 to 27 psi at low idle when other people say theirs idles at 29 psi. I have tried Pennzoil ultra platinum 0w20 and now has amsoil signature 0w20 with mopar filter and I still can't get this engine to sound decent on start up. Everything else about the jeep is great except the pentaturd and, surprise, the engine was made in mexico. Anyone else have these issues and have any suggestions on how to fix them. I've already taken the jeep to the dealer several times and they can't fix anything.

I'm getting really burnt out on my JL wrangler's Pentastar engine, I have a 2022 with the 3.6L with 6 speed manual with 4000 miles and that engine has become a daily dread every time I have to cold start it. Sometimes it gets a lifter tick for 20 seconds until oil pressure builds in the lifter tappets and it has this weird idle down tapping noise off fast idle that I have been complaining about since new. Also I have noticed that after the engine has ran for a while my oil pressure will read 26 to 27 psi at low idle when other people say theirs idles at 29 psi. I have tried Pennzoil ultra platinum 0w20 and now has amsoil signature 0w20 with mopar filter and I still can't get this engine to sound decent on start up. Everything else about the jeep is great except the pentaturd and, surprise, the engine was made in mexico. Anyone else have these issues and have any suggestions on how to fix them. I've already taken the jeep to the dealer several times and they can't fix anything.

Hmmm, I currently have the I4 in the 4Xe, however I just traded a GC Summit with the 3.6 Pentstar. I must say that I never had any problems with it. It ran perfectly for 120,000 miles until I traded it. Good mileage, good power, smooth running and never lost a drop of oil. I thought it was a good engine. Sorry to hear about yours.
Dana

 

[MagnusWolf89]

The other thing I thought of maybe the amsoil that I am using is causing the oil pressure to be lower, performance oils are made to flow faster than most so easier flow means less restriction leading to less pressure build up. I guess when I do my next oil change I could try just regular pennzoil platinum that everyone else uses to see it it goes back to 29.

 

[MagnusWolf89]

Haven't read all the posts as this thread is a like a snowball rolling down a mountain, but OP what is your Oil Pressure over 3500 rpm, didn't see if that was mentioned before?

Above 3500 rpm it will jump up past 77 psi like its supposed to and cruising is will bounce between 30 and 31. Hot idle after driving a while it will go to 29 then slowly drop to 28 and 27 then after a while settle at 26.

 

[TaiMc]

Above 3500 rpm it will jump up past 77 psi like its supposed to and cruising is will bounce between 30 and 31.

Haven’t seen the 26…but the other numbers you mentioned are identical to mine.

It seems like the oil pressure is where it needs to be when you need it to perform…above 3500rpm and cruising. ?

When you see 26psi, does the Jeep act a certain type of way? Does it feel different? ( sorry if you mentioned this before)

 

[MagnusWolf89]

Haven’t seen the 26…but the other numbers you mentioned are identical to mine.

It seems like the oil pressure is where it needs to be when you need it to perform…above 3500rpm and cruising. ?

When you see 26psi, does the Jeep act a certain type of way? Does it feel different? ( sorry if you mentioned this before)

No, still runs fine. Also mine is a manual so the ECM could be backing of the pressure because my engine has no load at idle. Automatic transmissions have to turn a heavy torque converter and pump so there is a constant load on them, that was another thought that crossed my mind. Thank you for being helpful by they way.

 

[OldBlue]

Above 3500 rpm it will jump up past 77 psi like its supposed to and cruising is will bounce between 30 and 31. Hot idle after driving a while it will go to 29 then slowly drop to 28 and 27 then after a while settle at 26.

Nothing wrong with any of that.

 

[TaiMc]

No, still runs fine. Also mine is a manual so the ECM could be backing of the pressure because my engine has no load at idle. Automatic transmissions have to turn a heavy torque converter and pump so there is a constant load on them, that was another thought that crossed my mind. Thank you for being helpful by they way.

Not a problem!

From the sounds of it…seems like you worked out a sustainable plan. If you feel that the viscosity of your oil may be adding to the slightly low pressure,do what you feel you need to do for that peace of mind.

If the Jeep is driving/idling like “normal”…if you aren’t smelling anything…no smoke…no slow acceleration, I think you’ve done all you can at this point, and it’s in decent working condition.

Keep an eye on it regularly, but I think you have a fully-functional Jeep. ??

ENJOY your week!

 

[Dp227]

@MagnusWolf89

For me, it’ll quickly settle at 28 PSI. Using the dealers oil (should be Penzoil Platinum). Might drop to 27 for a second, but it definitely prefers 28.

I’ve not done any tests to see if it will drop below 28 if you just let it idle for 2 minutes, only checked at quick stop lights. The only time I see it go below that is when I’m letting out the clutch without using the accelerator and the rpm’s barely dip.

This may be a stupid series of questions, and I’m certainly no mechanic, but

-what is your idle speed (ideally read digitally)?
-what octane fuel are you using?
-what’s your elevation?
-what accessories are running/powered?
-have you ever used a Tazer? (I’ve seen reports here I think on the diesel about unmarrying not always restoring factory idle speed settings.)

That said, drive more worry less. If you’re worried by it, dump it and check out another.

Life’s just too short.

 

[MagnusWolf89]

@MagnusWolf89

For me, it’ll quickly settle at 28 PSI. Using the dealers oil (should be Penzoil Platinum). Might drop to 27 for a second, but it definitely prefers 28.

I’ve not done any tests to see if it will drop below 28 if you just let it idle for 2 minutes, only checked at quick stop lights. The only time I see it go below that is when I’m letting out the clutch without using the accelerator and the rpm’s barely dip.

This may be a stupid series of questions, and I’m certainly no mechanic, but

-what is your idle speed (ideally read digitally)?
-what octane fuel are you using?
-what’s your elevation?
-what accessories are running/powered?
-have you ever used a Tazer? (I’ve seen reports here I think on the diesel about unmarrying not always restoring factory idle speed settings.)

That said, drive more worry less. If you’re worried by it, dump it and check out another.

Life’s just too short.

So you have the same type of jeep and it is behaving like mine because it too will bounce between 28 to 27 until you let it idle for a while. Last night it seemed to behave better as it stayed at 28 to 29 at hot idle. I'm thinking the oil is causing it. Idle speed was around 645, currently on 87 octane, close to sea level, bone stock, no I do not have a tazer. Thank you for your comment, I feel better about it now.

 

[Dp227]

So you have the same type of jeep and it is behaving like mine because it too will bounce between 28 to 27 until you let it idle for a while. Last night it seemed to behave better as it stayed at 28 to 29 at hot idle. I'm thinking the oil is causing it. Idle speed was around 645, currently on 87 octane, close to sea level, bone stock, no I do not have a tazer. Thank you for your comment, I feel better about it now.

So yes, then you and I are more or less equivalent. No Tazer here either, stock with only the options that it left the factory with (more or less -- but no electronic / mechanical changes). Elevation is around 1200 for me. I think I'm currently running 91, but that was part of a test - usually I run 87.

You could also check the oil level I suppose, although 26 doesn't sound concerning at all to me TBH. Again though, not a mechanic. Certainly not low oil pressure at idle by any definition.

That said, I've got to run to the store later. I'll let it idle a bit and let you know, but I really wouldn't be too worried whether we match up or not.

 

[MJ48]

I wish I could just trade it in but it is too new and has negative equity therefore my car payments will be astronomical. I hate the feeling of being stuck with a defective engine.

you have recorded your issues with the Jeep dealer. Make sure you have a paper trail. Buy extended warranty, if you didn't already. Then just run it, complain when something is wrong, If you have a major failure you are covered.

 

[Sidewalk]

I have pretty low standards when it comes to my equipment, but with only 4000 miles (since July), this whole vehicle is insanely smooth and quiet.

Go drive my 1995 7.3 Powerstroke with 300,000 miles for a few miles. I wish the Jeep was rougher around the edges; feels too fancy for my liking.

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