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[Flybytoole]

Hi All, Last Saturday, I purchased my new to me 2018 JL and very excited to join the family!
When ever I purchase a used new-2-me vehicle, the first task I have are to change fluids so the I have a base point. Unfortunately when I crawled under the jeep and look up to drain the oil, I notices oil where it should be. Upon researching your forum, I see that I have the dredged main bearing leak mentioned here numerous times. The JL has 65,000 and I purchased it from a Jeep dealership here in FL.

Fortunately, they offer a 30 day, 300 mile warranty with their used vehicles, so back to the dealship I go.
If anyone can share some insight, i would greatly appreciate it before i get bent over a barrel at the dealership.
I understand this is a common problem and wonder if it's happening across the Stalantis board? Is it time for a class action lawsuit?

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[2019JLUS]

Hi All, Last Saturday, I purchased my new to me 2018 JL and very excited to join the family!
When ever I purchase a used new-2-me vehicle, the first task I have are to change fluids so the I have a base point. Unfortunately when I crawled under the jeep and look up to drain the oil, I notices oil where it should be. Upon researching your forum, I see that I have the dredged main bearing leak mentioned here numerous times. The JL has 65,000 and I purchased it from a Jeep dealership here in FL.

Fortunately, they offer a 30 day, 300 mile warranty with their used vehicles, so back to the dealship I go.
If anyone can share some insight, i would greatly appreciate it before i get bent over a barrel at the dealership.
I understand this is a common problem and wonder if it's happening across the Stalantis board? Is it time for a class action lawsuit?

Hello! I’m Grok 3, created by xAI, and I’m here to help you with your situation. It sounds like you’ve recently purchased a 2018 Jeep Wrangler JL with 65,000 miles from a dealership in Florida, and you’ve noticed an oil leak after changing the fluids. That’s frustrating, especially since it’s a new-to-you vehicle! Let’s break this down and see how we can assist.
Understanding the Issue
The image you provided shows oil spots on the ground, which confirms there’s a leak. Oil leaks can stem from various sources in a vehicle like the Jeep Wrangler JL, such as:

• Oil pan gasket: Common in older vehicles or those with high mileage.
• Valve cover gasket: Another frequent culprit, especially if the engine has been subjected to temperature changes.
• Oil filter housing: If it wasn’t installed properly during the fluid change.
• Rear main seal: Less common but possible with 65,000 miles.
• Other components: Like the oil cooler lines or a cracked engine block (though the latter is rare).

Given the mileage and the fact that the leak appeared after a fluid change, it’s possible the issue was either pre-existing (and not disclosed) or exacerbated during the maintenance.
Steps You Can Take

1. Document Everything: Take more photos of the leak, note the dates and times, and keep a log of how much oil you’re losing. This will be useful if you need to escalate the issue.
2. Return to the Dealership: Since you’re within the 30-day, 300-mile warranty period, take the vehicle back to the dealership where you bought it. Show them the evidence and ask for an inspection. The warranty should cover repairs for this kind of defect.
3. Request a Thorough Inspection: Ask them to check the source of the leak and provide a written report. If it’s a significant issue (e.g., engine damage), you might have grounds to negotiate a refund or replacement under the warranty or Florida’s used car lemon laws.
4. Know Your Rights: In Florida, the “Florida Motor Vehicle Retail Sales Finance Act” and the “Florida Deceptive and Unfair Trade Practices Act” offer protections for used car buyers. If the dealership knew about the leak and didn’t disclose it, this could be considered a violation.

Is This a Widespread Issue?
Oil leaks can happen across various makes and models, including Jeeps, due to age, mileage, or maintenance history. The 2018 JL Wrangler is generally well-regarded, but some owners have reported gasket or seal issues over time, especially around the 50,000–70,000-mile mark. Whether this is a widespread problem with the Stellantis (the parent company of Jeep) board would require more data, which I can’t confirm without searching. If you’re curious, I can offer to search X posts or the web for similar complaints—would you like me to do that?
Class Action Lawsuit?
A class action lawsuit is a big step and typically requires evidence of a systemic defect affecting many owners, plus proof that the manufacturer or dealership knowingly sold faulty vehicles. While your situation is concerning, one leak alone doesn’t justify a lawsuit. However, if you find other owners with similar issues (especially post-purchase from the same dealership or model year), it might be worth consulting a lawyer. For now, focus on resolving it with the dealership.
Advice
Before you head back, call the dealership and explain the situation calmly. Ask to speak with the service manager and reference your warranty. Bring the vehicle in as soon as possible to avoid exceeding the 30-day/300-mile limit. If they’re uncooperative, you might consider contacting the Florida Attorney General’s Office or a local consumer protection agency for guidance.
I hope this helps! If you’d like me to analyze more details (e.g., additional photos or documents) or search for similar experiences, just let me know. Good luck, and I hope you get this sorted without too much hassle!

 

[Riptide_JLU]

Hi All, Last Saturday, I purchased my new to me 2018 JL and very excited to join the family!
When ever I purchase a used new-2-me vehicle, the first task I have are to change fluids so the I have a base point. Unfortunately when I crawled under the jeep and look up to drain the oil, I notices oil where it should be. Upon researching your forum, I see that I have the dredged main bearing leak mentioned here numerous times. The JL has 65,000 and I purchased it from a Jeep dealership here in FL.

Fortunately, they offer a 30 day, 300 mile warranty with their used vehicles, so back to the dealship I go.
If anyone can share some insight, i would greatly appreciate it before i get bent over a barrel at the dealership.
I understand this is a common problem and wonder if it's happening across the Stalantis board? Is it time for a class action lawsuit?

You will get better responses if you add what engine and transmission you have. I’m betting you have a 3.6L, and if that is the case, it most likely is the oil cooler leaking. It’s common and there are a couple fixes out there. Mopar has a newer version of the oil cooler out now that is supposed to address this exact issue. Could it be the rear main, sure. Is it likely, no unless somebody rode that thing hard.

 

[flick2614]

Has a Jeep for a week and is already talking class action lawsuit.......

 

[Flybytoole]

Did you have a question?

 

[Flybytoole]

You will get better responses if you add what engine and transmission you have. I’m betting you have a 3.6L, and if that is the case, it most likely is the oil cooler leaking. It’s common and there are a couple fixes out there. Mopar has a newer version of the oil cooler out now that is supposed to address this exact issue. Could it be the rear main, sure. Is it likely, no unless somebody rode that thing hard.

2.0T ZF8

 

[ArmyW4]

Has a Jeep for a week and is already talking class action lawsuit.......

Has a Jeep for a week and is already talking class action lawsuit.......

A seven year old Jeep!

 

[Phrank]

Has a Jeep for a week and is already talking class action lawsuit.......

Just wait 'til the electronics lock up and the paint falls off.

 

[Flybytoole]

Wow, all I can say is to go back and read my post!
Also, I never bashed Jeep, so maybe you should leave the forum as it doesn't need such bitter people like you representing it!

 

[garyji]

Not trying to be a prick, but you bought "O-P-J" (Other People's Junk) and didn't inspect it first. As others have said, probably the oil cooler.

G.

 

[Wbino]

Between interest rates being generally lower on new Jeeps than used and the new car warranty,
I would always recommend buying new because it is probably cheaper in the long run.

 

[Flybytoole]

A direct quote from your post:
" Is it time for a class action lawsuit?"

I stand by what I said. And I'm grumpy, not "bitter". I am tired of the victim mentality we have fostered in this country.

Once again, I never claimed to be a victim. You write as if I'm a 20 something, though I'm 59 and will versed in purchasing used cars. I also used to manage an Auto garage. I know where I stand with my jeep issues. I was simply asking questions about on going events with Stalatis and how many others

Every is so trigger happy theses days

 

[2019JLUS]

Likely Source of the Leak
Based on the location and the patterns I found in my earlier search, the leak is most likely coming from one of these sources:

1. Rear Main Seal: The rear main seal is located where the engine’s crankshaft exits the block to connect to the transmission. If this seal fails, oil will leak out and often drip down to the bell housing area, exactly where you’re seeing the oil in the image. This aligns with reports from other JL owners with the 2.0T engine, where the rear main seal was a frequent culprit. The fact that your Jeep has 65,000 miles makes this a plausible issue, as seals can wear out over time due to heat, pressure, and age.
2. Oil Separator Leak: As mentioned in my previous response, the oil separator (also called the PCV oil separator) on the 2.0T engine has been a common failure point. If the separator is leaking, oil can travel down the engine block and pool in areas like the one shown in your photo. Some owners noted that oil separator leaks can mimic a rear main seal leak because the oil drips down to the same area. The oil separator is located higher up on the passenger side of the engine, so the oil would have to run down to this spot, which is consistent with the distribution in the image.
3. Oil Pan Gasket or Upper Oil Pan: Another possibility is a leak from the oil pan gasket or the upper oil pan, which has been mentioned in discussions about the 2.0T engine. A 2019 JL owner with 122k miles reported a leak possibly from the upper pan gasket in January 2025. If the gasket is failing or a bolt is loose, oil could seep out and run down to the area you’re showing.
4. Other Possibilities: Less likely but still possible sources include a loose or damaged oil filter housing, a cracked engine block, or a leak from another nearby seal (like the crankshaft or camshaft seals). However, these are less common based on the location of the oil in your photo.

Why This Might Be a Common Issue
The 2.0T engine in the 2018-2024 Jeep Wrangler JL (part of the Hurricane engine family) has been noted for issues with the rear main seal and oil separator, as I found in my earlier research. The oil separator, in particular, seems prone to failure due to loose bolts or degraded seals, and replacing it is a labor-intensive job (12-13 hours of work, costing around $1,200-$1,300). The rear main seal is another weak point, with some owners reporting failures as early as 5,000 miles. These issues don’t appear to be Stellantis-wide across all their vehicles but are more specific to the 2.0T in the Wrangler JL, possibly due to the engine’s design, the stresses of the vehicle’s RWD-biased platform, or quality control issues during manufacturing.

 

[Flybytoole]

Thank you, very informative! I'll look into the into the other areas closer. Again Ty

 

[JLRyder]

Location looks like a rear main, could be leaking from up top. Honestly you have to expect this from an older Jeep with unknown Mx history. Take it back and walk since it’s an option.

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