How did you decide on your engine?

[AnnDee4444]

To me the 2.0 sounds like a tractor, with it's relatively low redline and noisy injectors. It's 1/2 of a flat-plane V8, and to me those don't quite sound as good as cross-plane V8s.

I've haven't heard too many 60° V6s that I've liked the sound of... or even inline 6s. Six even firing pulses usually doesn't sound great to me (with the Porsche exception). However an odd-firing 90° V6 does have some appeal.

My opinion is that the engine tune makes a far greater impact on if a motor sounds good or not. A lazy tune on a V8 could be outdone by a high compression 4-cylinder with aggressive tuning.

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[Vkgargus]

"Sound" is truly subjective. To me, the 3.6 sounds MUCH more sporty. It has that better sports note to it. The 2.0T is a much quieter exhaust. I can hear the turbo from outside, but barely from the inside cabin. I may be getting old, but I like the quiet of the 2.0. There are exhaust kits available for the 2.0 and some like them. To me they make it sound like a kid with a honda trying to sound fast. If you're looking for an exhaust sound the 3.6 sounds way better. That being said I appreciate the quiet of my 2.0.

If I was going for sound or fast I'd get a 6.4 LOL

This was helpful. I drive a Tesla and love the quiet .

 

[Devil6Dog]

I don't know anything about engines but I do know driving 70 mph with35's on a 2.5"lift and I punch it to pass a car it really takes off. Caught me by surprise the take off power it had. Very happy with 2.0

 

[Windshieldfarmer]

I don't know anything about engines but I do know driving 70 mph with35's on a 2.5"lift and I punch it to pass a car it really takes off. Caught me by surprise the take off power it had. Very happy with 2.0

Yep - surprisingly stout.

 

[MSteeves]

Blowby is caused by crankcase pressure. This pressure builds as the result of the downward stroke of each piston. As piston rings wear to the point of becoming tired, combustion pressure begins to leak past them, thus increasing crankcase pressure and the amount of blowby created.

What are the various opinions regarding vented oil caps/valve cover breathers, such as this one:

https://www.c-f-m.com/performancepa...2020-Gladiator-JT-3-6L-Pentastar-746p6610.htm

 

[Headbarcode]

What are the various opinions regarding vented oil caps/valve cover breathers, such as this one:

https://www.c-f-m.com/performancepa...2020-Gladiator-JT-3-6L-Pentastar-746p6610.htm

All engines used to be vented to atmosphere. This avoided having that mixture of oil and water vapor being fed back into the intake tract, which tends to condense in that cooler environment before eventually getting burned off in the cylinders and potentially leaving carbon deposits to build up.

If I had the 3.6 and didn't live in a carb state, I'd give that part a whirl. As long as it didn't trigger any codes, than worst case scenario would be the possibility of oil/water marks around that spot on the valve cover, depending on how much, if any, blowby your engine is producing.

I have the 2.0 with just over 52k miles on the clock. During every 5k oil change, I check for signs a blowby in the intake. Knock on wood, it remains bone dry, so the catch can that I bought in the beginning stays in its original box. I also only use tier 1 fuel from Mobil and top shelf oil. There are far better places to save a buck, than when it comes with what my jeep eats and drinks.

 

[Heimkehr]

I have the 2.0 with just over 52k miles on the clock. During every 5k oil change, I check for signs a blowby in the intake.

If it's not too involved, maybe a mini-tutorial of how to do so? If it is reasonably complex, though, just say so.

 

[AnnDee4444]

FWIW: I've read that negative crankcase pressures are better for power. Venting to atmosphere won't create a vacuum (unless it's a road draught tube), but running the PCV valve to the intake does. I've even heard of running the PCV system to the exhaust to create the vacuum.

 

[slowpoke387]

Being in the car business for almost 40 years I want zero to do with a 4T long term. Every vehicle we see with that configuration is a nightmare down the road. I'm def not going to driving a Wrangler for fuel economy and if youre planning to keep it long term feel free to come back in 10 yrs to vent about the reliability issues. It's all fun and games until the warranty is out lol. Of course theyre great NOW. Reminds me of most reviews on most products. Theyre usually all dated within a few months of purchase and the buyer is all excited and happy. I prefer to look for the long term reviews.
Tried and true ftw.

 

[MSteeves]

All engines used to be vented to atmosphere.

Yeah, I'm an old enough gasbag to remember that. I was curious as to how venting a system not designed to be vented - at least in that manner - would work out. These caps seem to be popular on some makes and models of vehicles, but I'm not finding much on the various forums about using them on JL/JLU of any engine type.

 

[Headbarcode]

If it's not too involved, maybe a mini-tutorial of how to do so? If it is reasonably complex, though, just say so.

I just simply pull the intake boot off the throttle body and feel around where I can reach, and it's angled nicely to peer down into it with a flashlight. I'll be doing a set of plugs at around the 60k mark, so I plan on taking a peak in each cylinder to see how it looks. I'll have to take some pics to share with my fellow fans of the low and mid range torque.

 

[Headbarcode]

FWIW: I've read that negative crankcase pressures are better for power. Venting to atmosphere won't create a vacuum (unless it's a road draught tube), but running the PCV valve to the intake does. I've even heard of running the PCV system to the exhaust to create the vacuum.

Yeah, that's the type of venting that I'm accustomed to. A simple thin-walled steel tube that extends just below the oil pan sump.

 

[Headbarcode]

Yeah, I'm an old enough gasbag to remember that. I was curious as to how venting a system not designed to be vented - at least in that manner - would work out. These caps seem to be popular on some makes and models of vehicles, but I'm not finding much on the various forums about using them on JL/JLU of any engine type.

I sometimes miss being able to smell the condition of a motor out ahead in traffic, just by nose. ?

I've never even heard of those vented caps until your link. My 1st concern would be if it caused a code to pop up. UPR has a good reputation for their catch cans for the 3.6, if you're just looking to keep a clean and predictable air/fuel mixture going through your engine.

A quick and simple blowby check is to remove the oil fill cap with the engine idling.

 

[randyhub]

Call me old school, but to me the KISS principle is what is important especially when off road. You are beating on a vehicle offroad and the more complexity means more things stressed. Etorque, hybrid, turbos, are great around town, offroad I will take a V6 everytime. No replacement for displacement. Yes I have owned 2 cars with turbos, but I also know they generate heat and have much more engine management components never mind plumbing. Trying to find my Rubicon with a V6 without etorque or a 4 banger was much more difficult. The KISS principle works well with my Rubicon and Suzuki DR650.

 

[AnnDee4444]

Call me old school, but to me the KISS principle is what is important especially when off road. You are beating on a vehicle offroad and the more complexity means more things stressed. Etorque, hybrid, turbos, are great around town, offroad I will take a V6 everytime. No replacement for displacement. Yes I have owned 2 cars with turbos, but I also know they generate heat and have much more engine management components never mind plumbing. Trying to find my Rubicon with a V6 without etorque or a 4 banger was much more difficult. The KISS principle works well with my Rubicon and Suzuki DR650.

This thread is old school.



FYI: there is nothing simple or old school about any JL, regardless of engine choice.

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