For the first time in 1991, Chrysler introduced the 3.8-liter V6 engine. The Jeep Wrangler JK continued to use it until 2011, giving it an impressive 20-year lifespan. The power and efficiency of Chrysler/Jeep 3.8L engines were improved several times during this time period.
However, a few things remained constant, one of which is dependability. Many common issues with the Chrysler 3.8 V6 engine are discussed here, including reliability, performance numbers, and more.
Alternatively, the Chrysler engine can be referred to as the Jeep 3.8L motor
What Cars Use the 3.8L V6?
In the following Jeep and Chrysler models, you’ll find 3.8-liter V6 engines:
- 1991-1993 Chrysler New Yorker
- 1991-1993 Chrysler Imperial
- 1994-2010 Chrysler Minivans
- 2007-2011 Jeep Wrangler JK
The engine was also used in the Volkswagen Routan from 2009 to 2010. With the exception of the Volkswagen badge, this minivan is essentially built on the Chrysler RT minivan platform.
Jeep 3.8 Engine Specs
The 3.8-liter engine has a bad reputation among some customers because they believe it is underpowered. Due to its early 1990s design engine, this may be the case, especially on newer minivans and Wrangler JKs. A lot has changed in terms of power and performance in the intervening time period.
The Jeep Wrangler, on the other hand, is a much larger vehicle than previous models and lacked adequate gearing in relation to its considerable size and weight. Anyway, the following are the technical specifications for the 3.8-liter engine found in Chrysler and Jeep vehicles.
|Block Material||Cast Iron|
|Valvetrain||OHV, 12 valves|
|Bore x Stroke||3.78 in x 3.43 in|
|Compression||8.9 : 1 to 9.6 : 1|
|Torque (lb-ft)||203-245 TQ|
The Chrysler 3.3L V6 engine shares a lot of similarities with this one. Simpler in size with a few tweaks to accommodate the increased displacement. In any case, none of these figures are particularly noteworthy in today’s terms. However, keep in mind that production of the Chrysler/Jeep 3.8 V6 was introduced in 1991.
Cast iron blocks were common in the past for their strength, but the design is now too heavy for most modern engines to operate. Overhead cams are not used in the Chrysler 3.8L engines, which have a pushrod OHV design as well.
Over the years, Chrysler has made some noteworthy improvements and additions to the engine. The intake system, compression ratio, and camshafts have all been updated. At its peak, the 3.8 V6 produced 215 horsepower and 245 lb-ft of torque in the early 2000s. 3.8 liter engines’ power was reduced slightly following later software updates. Instead of narrowing the torque curve, they help widen it for better overall performance.
Chrysler 3.8 Engine Problems
The following are some of the more frequent Chrysler 3.8 engine issues:
- Excess oil consumption
- Intake manifold leak
- Timing cover issues
- Oil leaks
We’ll look at each of the problems with the Chrysler 3.8 engine in detail throughout the rest of this article. Before continuing, however, a few clarifications are necessary. These are the most frequent engine issues. It doesn’t always imply that these are widespread problems. Instead, these are some of the common places where issues or failures occur.
The Chrysler & Jeep 3.8 V6 engine, on the other hand, is extremely dependable. However, no engine is faultless. The bad experiences of some are unavoidable while the long engine lifespans of others are.
It’s also an older engine, so there’s a higher risk of reliability issues and other engine-related problems. Finally, we’ll get back to the subject of Chrysler 3.8L reliability. For the time being, let’s talk about some typical Chrysler 3.8 engine issues.
1) 3.8L V6 Excess Oil Consumption
We have a hard time bringing up contentious issues. It’s been said that the Chrysler 3.8L engine uses a lot of oil, but that’s just rumor. Numerous other people have first-hand knowledge of the Chrysler 3.8 V6’s oil consumption issues. We believe the truth is likely somewhere in the middle, and the internet does have a tendency to exaggerate things.
Regardless, the subject of excessive oil consumption is frequently broached. When it comes to long-term dependability, most people have little to worry about. However, if the 3.8L V6 is using a lot of oil, make sure it doesn’t run out. It’s never a good idea to drive with low oil levels because it compromises the engine’s longevity and resale value.
However, excessive oil consumption can sometimes signal a more serious underlying issue. Bearing wear and piston ring cracks, among other things, can cause engines nearing the end of their useful lives to begin burning more oil than they previously had been using. To put it another way, excessive oil consumption on old, high-mileage Chrysler 3.8 engines should be taken seriously.
Jeep 3.8 Oil Consumption Symptoms
The following are some signs of a Chrysler 3.8 V6 engine with excessive oil consumption:
- Low engine oil
- Burning oil smells
- Smoke from exhaust
- Other issues
The fact that we’re using more oil than we should is the primary symptom we’re discussing. Engines with Chrysler 3.8L displacement can consume as much as a quart of fuel every 1,000 miles. If you smell burning oil or see smoke coming from the exhaust, this could be a sign of something more serious.
Engine knocks, ticking, and other noises are common as engines get older. Apart from the “natural” high oil consumption, this could indicate an engine that’s nearing the end of its useful life.
3.8L V6 Oil Consumption Fix
2) Chrysler 3.8 Intake Manifold Leak Problems
The Chrysler 3.8 engine’s lower intake manifold gasket is prone to leaking coolant, so that’ll be the next issue to address. Jeep and Chrysler engines from 2001 and later are particularly susceptible to this problem. At this time, Chrysler switched to a more powerful and efficient intake manifold.
Anyway, this issue isn’t particularly complex. With time and use, the gasket on the lower intake manifold will fail. Coolant leaks from the manifold as a result of developing cracks. A lot of Chrysler and Jeep 3.8L V6 engines have this problem.
These problems are most likely to appear in vehicles that are 8 years old or older, or in vehicles with less than 100,000 miles on them. Lower manifold gasket wear and tear can cause issues earlier, but it’s more common as the engine ages.
3.8 Liter Intake Manifold Leak Symptoms
The following are symptoms of a problem with the 3.8L V6’s lower intake manifold gasket:
- Visible coolant leak
- Low coolant
- Wet transmission bell housing
- Steam from engine bay
Bad intake manifold gaskets on the Jeep 3.8 engine commonly manifest as visible coolant leaks. Also, you may find that your coolant is frequently low. However, it’s likely that the leak will become apparent sooner rather than later.
The transmission bell housing is frequently wet from an intake manifold leak on a Chrysler 3.8. There may be a problem if you see water or coolant in that area. In the event that coolant drips onto hot components and burns away, steam may also be generated.
Chrysler 3.8 Intake Manifold Gasket Replacement
The good news is that gaskets are typically inexpensive to replace. The Chrysler 3.8L V6’s intake manifold is also located near the top of the engine, making removal straightforward. In most cases, a skilled mechanic can finish the job in as little as 1-2 hours. As a result, expect to pay between $150 and $250 for labor, with gaskets costing less than $50.
In the grand scheme of things, this is a relatively insignificant problem. Even a novice do-it-yourselfer can complete this project for less than $50. The removal of just a few bolts can be tedious, so take your time and make certain the new gasket seals correctly.
3) Jeep 3.8L V6 Timing Cover Issues
A new Chrysler 3.8L engine leak has been found. This issue has been documented in a Jeep technical service bulletin (TSB). Chrysler’s 3.8 V6 engine models are also susceptible to timing cover oil leaks. In any case, the o-rings in the timing cover are the problem.
The timing cover’s o-rings may crack, deform, or break if they are defective. The timing chain cover develops an oil leak as a result of this. In that area, keep an eye out for any signs of oil leakage. To avoid boring you, we’re only going to talk about one aspect of this topic.
Additionally, we’ll talk about symptoms and replacement when we get to general oil leaks. The good news is that the timing chain cover oil leaks should have been repaired as part of the warranty. If you don’t, you’ll be on the hook for the full amount.
4) Chrysler 3.8 Oil Leak Problems
If your Jeep isn’t dripping oil, then you have run out. This is a joke we heard a while back. Having come from the BMW industry, we have a good understanding of this. Chrysler and Dodge models with the 3.8 V6 engines have oil leak problems as well. Oil leaks affect a wide range of engines, so Jeep, Chrysler, and BMW aren’t the only ones who suffer from them.
We already discussed the Chrysler 3.8 manifold coolant leak, and oil leaks aren’t all that different. The seals, o-rings, and gaskets on your car will degrade over time and mileage. Cracks appear, and small leaks begin to appear. Oil leaks on the 3.8L V6 are more common as the vehicle gets older and more miles have been put on it.
The valve cover gaskets for the Chrysler 3.8 are what we’re primarily concerned with in this article. When it comes to 3.8 liter V6 oil leaks, these are some of the most common. However, leaks from the main crankshaft seals and the oil pan gasket do occur. The best time to look for leaks is 8+ years and 100,000 miles down the road.
3.8L V6 Oil Leak Symptoms
The signs and symptoms of an oil leak are usually easy to identify. Nevertheless, keep an eye out for the following signs of a Jeep/Chrysler 3.8 oil leak:
- Visible leak
- Burning oil smells
- Smoke from engine bay
It’s a dead giveaway if there is a visible leak. If you notice oil splatters on the ground after you’ve parked your car, it’s time to find the source of the leak. As with the oil pan gasket and main seals, the timing cover will frequently leak and leak onto the ground.
The valve cover gaskets, on the other hand, are located at the very top of the engine. Small oil leaks may simply burn off before reaching the ground in these situations. The Chrysler 3.8 engine may emit burning oil odors or smoke.
Chrysler/Jeep 3.8 Oil Leak Fix
As with the intake manifold coolant leak, parts to repair an oil leak are usually inexpensive. When the Chrysler 3.8 engine leaks oil, it’s usually due to faulty gaskets, seals, or o-rings. The good news is that most of these parts are in the $10-50 range.
Oil leak repairs have the unfortunate side effect of requiring more time and effort. Of course, this is dependent on the specific leak, but labor can take anywhere from 1 to 5 hours, so be sure to factor that in. These leaks can be fixed for pennies on the dollar by do-it-yourselfers.
Chrysler 3.8 V6 Reliability
Is the 3.8-liter V6 engine in Jeep/Chrysler vehicles dependable? We estimate the reliability of this engine to be average. As for which engine is superior, the Jeep community isn’t going to choose the 3.8L over the AMC 4.0L. The Chrysler 3.8, on the other hand, has a well-deserved reputation for dependability. Problems like excessive oil consumption and leaks in the cooling system or gaskets are not uncommon.
A small percentage of Chrysler 3.8 engines fail prematurely, and their owners are quick to decry the engine in question. Others can go up to 300,000 miles or more with no problems at all.
All automobile engines follow the same principle. The world will always have a few great ones, as well as some unfortunate early failures. There are times when we don’t have complete control and everything comes down to chance.
We can, however, manage maintenance. Maintain your vehicle’s fluids, use high-quality oils, and take care of problems as they arise. The Jeep and Chrysler 3.8 engine can be made more reliable by performing this maintenance on it. There are a small number of vehicles that reach a longevity of over 250,000 miles.