Le Jeep - The 1985 Jeep Cherokee Diesel

Le Jeep – The 1985 Jeep Cherokee Diesel

The 1985 Jeep Cherokee Diesel

After decades of super cheap gasoline, people in the ‘70s and ’80s began suffering the slings and arrows of outrageous fuel prices. Wait a minute… why does that sound familiar? Anyway, gasoline quickly went from $0.35 a gallon to $1.12, and then even higher. Diesel jumped from about $0.23 per gallon to nearly a buck and then higher. It started with a Middle East oil embargo in the early ‘70s when we were still mostly buying Detroit road barges that just barely broke into double-digit miles per gallon. Talk about being caught with your pants down! Prices marched upward as the ‘70s passed into the ‘80s. Detroit scrambled to design more fuel-efficient vehicles and the import auto manufacturers got a surge of business.

The fuel economy crisis was addressed in many ways and you probably already know part of that was adding thrifty diesel to the car and truck lineups. Unfortunately, there was a lot of corporate stumbling around in the process, the Olds 350 diesel being a notorious face-plant, but there was one rig that stood out in a good light. Thirty-eight years down the road, still stands out… the Jeep Cherokee diesel.

Economy and Performance

The Jeep Cherokee XJ platform was introduced in 1984 in two guises, the top-line Wagoneer and the Cherokee, which was offered in several trim levels. They shared the same inline-four or 2.8L V6 powertrain choices and lightweight unibody construction. A Cherokee was under 3,000 pounds and even the top-line builds like the Wagoneer were only 3,200 pounds or so. Lightweight is conducive to a good economy and gives whatever engine is used the best chance of offering decent performance. The best part of the XJ line is that it also was faithful to the Jeep heritage by offering excellent stock off-road performance.

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Resplendent in its original Garnet Red paint, Rick and Paulette Riley’s Cherokee model 7800 Pioneer four-door was the middle trim level in the Cherokee lineup. The Pioneer Package had a list price of $1068 for ‘85. Production records show only 1,527 of these were built in ‘85. This Pioneer is enhanced with the addition of the Sport Aluminum Wheel option ($374).

Development of the XJ had started in the late 1970s but was on a slow track due to the red ink running all over AMC (who owned Jeep). The development of the new Jeep was speeded up by the addition of Renault as a partner. Renault of France first acquired a 22 percent share in AMC in 1980, later increasing it to 46 percent. Renault didn’t have much of a footprint here in the States but in Europe, it was a powerhouse manufacturer. There was an immediate infusion of European capital and engineering thrown into the development of the XJ and while it makes some grind their teeth, Renault added a number of technical improvements to the design. Reportedly, they also ran more than a little roughshod over their AMC and Jeep corporate partners.

The 2.1L turbo diesel is mostly aluminum and weighs in at about 300 pounds, ready to run, but for such a small engine it fills the engine compartment. It sports a 5-main crankshaft and has an overhead camshaft driven by a belt. The intercooler mounts just to the right of the radiator in a small housing. They are known by European car buffs as the Douvrin engine because they were built in northern France outside a town of that name from 1977 through 1996. A joint venture between Renault and Peugeot, the Douvrin gas engines powered a lot of European cars and light trucks in the ‘70s, 80s, and ‘90s, and a few here in the USA. The diesel variant was in production over the same period. The compression ratio was a high 21.5:1, necessary because of the indirect injection. The precombustion chamber was the Ricardo Comet V style, ubiquitous in the ‘70s and ‘80s. The diesel used a 3.38 x 3.5-inch bore and stroke, the bore being reduced and the stroke increased from the 2.0L gasser. Some of the latest variants in Europe made 91 horsepower due to turbo improvements and pump tuning.

The Cherokee was an immediate hit! For 1985, an oil burner was added to the available options and it came from across the pond in the form of a Renault 2.1L inter-cooled turbo diesel. It was available in all trim levels, including the Base, Pioneer, Chief, and Laredo, as well as the upscale Wagoneer. It could be had with any of the drivetrain options, a manual 5-speed or 3-speed automatic, and with full or part-time four-wheel drive. With the manual trans, you could enjoy 29 MPG, and the automatic delivered 23 mpg (both EPA combined ratings). The automatic diesel delivered the same EPA mpg as the manual trans gas 2.5L four.

The Renault Diesel

Europe was small-engine centric and thrifty diesel was common there in the ‘70s. As a result, they bridged the gap and made small diesel sprightly, if not sporty. Renault J8S in the XJ. The gassers ranged from 1.9 to 2.2L displacements and they have often been praised for their output and durability. The 2.1L diesel came naturally aspirated or turbocharged but its service history is a little more problematic.

The Garrett T-2 turbo was a wastegate on the J8S-814 and a small intercooler was mounted. It operated at a max boost of 7-8 psi and the Cherokee application included a boost gauge.

A Bosch VE pump is familiar stuff to many. It delivered more than enough juice for the 2.1L diesel.

The 2.1L (126 ci) in the Jeep XJ was called the J8S-814 and it differed from the other J8S diesel in the small details, such as accessory mountings. There were also separate variants designed for either longitudinal or transverse mounting. In Jeep CJs for the Euro market, a similar J8S-800 engine was used. The J8S-814 produced 85 hp and 132 lbs-ft. When the compact Jeep Comanche MJ pickup debuted in ’86 as a Cherokee derivative, it also had the diesel option but was only offered with a 5-speed.

The Garnet Red Mesa pattern cloth-insert seats were a $44 option over the standard all vinyl seats in the Pioneer Package. The interior is well laid out and very comfortable. The automatic is a 3-speed Model 904 Torqueflite with a lockup converter… essentially bulletproof, though the lack of overdrive is glaring when looked thru the modern point of view. The Riley’s Cherokee also has the optional Selec-Trac (NP229 transfer case), which offered a choice of rear-drive only, or all-wheel drive for the highway with a center differential and viscous coupling to lock it. Selec-Trac Trac Cherokees also had CV-jointed front axle shafts to reduce vibration in all-wheel drive. Standard axle ratios were 3.73:1. It’s got AC and a decent sounding AM/FM radio with multiple speakers. The rear seat is folded flat to offer an impressive amount of cargo space.

In North America, besides the Jeep, the J8S powered the Winnebago Centauri, Phasar, and LeSharo compact motorhomes. It was a lot overmatched in the motorhomes. They did their best but constant flogging in a 6,000-pound motorhome was enough to give it a relatively short life. The diesel’s weak links showed up in hard use, typically with the head gasket and head bolts, and it had a tendency to crack pre chambers when allowed to get hot. The head gasket issues were solved about the time Jeep ceased using the engine.

Living With Le Jeep

At first glance, it’s easy to think, “2.1L… gotta be a toad!” Surprisingly, they are not, though they are not hotrods. They are high reverse but when they come up onto the wastegate turbo, they buzz like a bee in a can. Rick Riley owns the ’85 Pioneer Wagon in the photos and has driven 2.8L V6 versions from the same era. “I think the diesel is just a bit faster,” he says.

Surprisingly, period magazine tests bear that out. A 2.8L V6 powered XJ 4-door delivered a 19.8 second 0-60 with 3.73 gears in Four Wheeler Magazine tests. A four-door diesel with 4.10s delivered 17.31 seconds. A 3.73 geared diesel 2-door gave a 20.1 second 0-60. All were 5-speed manuals. To compare, an ‘85 2.5L 4-cylinder gasser managed 19.8 seconds with a 5-speed. None of these times are blisteringly fast but it shows there was not much to choose between them… except in the fuel economy department.

Yeah, the 2.1L whupped the gassers hard in the economy department. Four Wheeler reported a 28 mpg combined average for the diesel with lead-footed testers behind the wheel and 16-20 mpg, or less, for the gassers, either four or six. Riley reports 28-30 mpg averages for his automatic ’85 and has seen 35 a couple of times when using a feather foot. Drivers of J8S-powered cars in Europe report 50 mpg.

The Legacy

By all reports, the J8S served well in the Cherokee, even though it didn’t sell particularly well. Yeah, the Olds 350 was still casting a dark cloud in the mid-’80s.

The Cherokee is generally responsible for keeping Jeep and AMC alive long enough for the company to be bought by a more financially healthy host… namely Chrysler Corporation… in 1987. Had AMC-Jeep been running in, or at least near to, the black, it would have put them in a very good market position. The XJ line was class-leading at its debut but short budgets slowed some of the advancements needed to keep it there.

The 2.1L Renault was offered in North American Spec Jeeps through ’87. In ’85, it was an $1124 option (compared to $300 for the V6), so it took a little while to pay off the difference via operating costs. The available production records are incomplete but indicate 329 diesel-powered XJ-based Wagoneers were built in ’85 and 3,343 2 and 4-door Cherokees. European spec Cherokees were offered with the engine to 1994. From 1990, the tweaked Euro spec J8S-890 version was offered with a variable nozzle turbo and delivered 91 hp.

FREQUENTLY ASKED QUESTIONS

How do users generally rate the 1985 Jeep Cherokee in terms of performance and durability?

User Ratings for the 1985 Jeep Cherokee

5 Stars: 1 user
4 Stars: 1 user
3 Stars: 0 users
2 Stars: 0 users
1 Star: 0 users

Performance

The 1985 Jeep Cherokee’s performance often draws mixed reactions. With a 2.5L inline-four engine, it’s hailed by some owners as completely adequate for daily commutes and weekend drives. However, others find its power output lacking, especially when compared to larger engine variants like the 2.8L V6, which offers minimal power advantage. The consensus is that it’s not the fastest SUV on the block, but its modest power can handle urban and suburban routes comfortably.

Durability

When it comes to durability, the Cherokee shines. Owners commonly praise its long lifespan, with some vehicles still running strong after 25 years on the road. Routine maintenance such as replacing the radiator, water pump, spark plugs, and shocks is expected and manageable for a vehicle of this age. Moreover, enthusiasts appreciate its build quality, often comparing it favorably against other brands like Toyota for longevity, particularly in the suspension department.

In conclusion, while the 1985 Jeep Cherokee may not be a powerhouse, its durability and charm make it a beloved classic among its owners.

Where can one find parts for the drivetrain of a 1985 Jeep Cherokee?

Finding Drivetrain Parts for a 1985 Jeep Cherokee

Looking for drivetrain parts for your 1985 Jeep Cherokee? Here’s how you can track down a front drive shaft and transfer case components:

Online Retailers

eBay Motors: A great place to discover new and used parts with competitive pricing.
RockAuto: Known for an extensive catalog, offering a variety of drive shafts and transfer case parts.
PartsGeek: Offers aftermarket and OEM parts, often at discounted prices.

Enthusiast Forums & Clubs

Jeep Forums: Joining a Jeep-specific forum can connect you with fellow enthusiasts who might have spare parts or valuable recommendations.
Cherokee Clubs: Local or online clubs often have leads on where to find rare parts, or may even have members looking to sell.

Salvage Yards

Junkyards and Auto Recyclers: Visiting or contacting junkyards can turn up original parts at a fraction of the new price. Websites like Car-Part.com can help locate which yards have the parts you need.

Specialty Shops

4×4 or Off-Road Shops: Specialized stores that focus on off-road and 4WD vehicles often stock Jeep-specific parts.

Local Auto Parts Stores

NAPA Auto Parts or O’Reilly Auto Parts: While stock may vary, they can often order specific components for older models.

By exploring these options, you’re likely to find the drivetrain parts you need for your 1985 Jeep Cherokee, keeping it running smoothly for your next adventure. Happy hunting!

What are the differences between rear-wheel drive and front-wheel drive engine blocks for the 1985 Jeep Cherokee?

Differences Between Rear-Wheel Drive and Front-Wheel Drive Engine Blocks for the 1985 Jeep Cherokee

Understanding the distinctions between rear-wheel drive (RWD) and front-wheel drive (FWD) engine blocks can help you make informed decisions regarding vehicle performance and handling. Here’s a breakdown specific to the 1985 Jeep Cherokee:

Engine Layout and Configuration

Rear-Wheel Drive (RWD):
- Typically features an inline engine configuration.
- The engine is mounted longitudinally, aligning the crankshaft with the vehicle’s length.
- This setup facilitates the transfer of power to the rear wheels through a driveshaft.
Front-Wheel Drive (FWD):
- Often utilizes a transversely mounted engine.
- The engine is sideways, which aligns the crankshaft perpendicular to the vehicle’s direction.
- The design promotes direct power delivery to the front wheels without needing a long driveshaft.

Handling and Performance

Rear-Wheel Drive (RWD):
- Offers better weight distribution with a more balanced front-back weight ratio.
- Enhances handling, especially useful for off-road and towing capacities.
- Known for delivering a ‘pushed’ feel during acceleration, often preferred in performance driving.
Front-Wheel Drive (FWD):
- Generally lighter, leading to improved fuel efficiency.
- Provides better traction on slippery surfaces because the engine’s weight is over the driving wheels.
- Easier to handle for everyday driving, with a ‘pulled’ sensation during acceleration.

Maintenance and Cost

Rear-Wheel Drive (RWD):
- More complex drivetrain may result in higher maintenance costs.
- Components like the driveshaft and differential may require additional attention.
Front-Wheel Drive (FWD):
- Simpler drivetrain generally results in lower maintenance costs.
- Fewer parts exposed to wear and tear compared to RWD systems.

Application Considerations

RWD:
- Better suited for applications requiring power and torque, such as towing and off-road driving.
- Ideal for drivers who prioritize sporty handling.
FWD:
- Best for city driving and commuter vehicles where fuel efficiency and ease of handling are priorities.
- Often preferred in regions prone to wet or snowy conditions due to superior traction.

Understanding these differences will help you choose the best configuration for your driving needs in a 1985 Jeep Cherokee.

Can a 1986 Jeep Cherokee engine fit into a 1985 model?

Fitting a 1986 Engine into a 1985 Jeep Cherokee

If you’re looking to swap a 1986 Jeep Cherokee engine into a 1985 model, you’re likely wondering about compatibility. Here’s a comprehensive breakdown to guide you:

Engine Compatibility:
Both the 1985 and 1986 Jeep Cherokee models used the 2.8L V6 engine. This means, at a fundamental level, the engines are similar, which simplifies the fitment.
Mounts and Connections:
- Engine Mounts: The mounting points should align since the vehicles are only a year apart and share the same engine size.
- Transmission: Ensure the bell housing and transmission connections match, as these can sometimes vary even with the same engine type.
Electrical Systems:
- Confirm that wiring harnesses are compatible or identify if any modifications are needed. Wiring configurations can change slightly between model years.
Exhaust and Intake Systems:
These components should fit, but always double-check to avoid issues, especially if there have been any changes in emissions standards or configurations.
Accessory Compatibility:
- Check if the alternator, power steering pump, and AC compressor are the same or require adjustments.
Cooling System:
Verify that the radiator and cooling system connections correspond to ensure proper engine functioning.

Final Considerations

Before proceeding with the swap, it’s crucial to consult a detailed service manual for both model years. If possible, work with or seek advice from a professional mechanic experienced with these vehicles to confirm all compatibility details and avoid unexpected hurdles.

Where is the ignition control module located in the 1985 Jeep Cherokee?

Locating the Ignition Control Module in a 1985 Jeep Cherokee

Replacing the ignition control module in your 1985 Jeep Cherokee can seem daunting if you’re not sure where to start. Here’s a straightforward guide to help you find and replace it.

Step-by-Step Guide:

Understanding Its Role: The ignition control module is crucial for managing the ignition system’s timing and spark. Knowing its function helps visualize where it might be located.
Checking Under the Hood: Begin by opening the hood of your Jeep Cherokee. Familiarizing yourself with the layout of the engine compartment is the first step.
Locating the Distributor: The ignition control module in the 1985 Jeep Cherokee is typically mounted near the distributor. This is because it works closely with the distributor to regulate the firing of spark plugs.
Looking on the Firewall or Fender: You’ll likely find the module attached to the firewall (the metal wall separating the engine from the cabin) or on the inner fender. Look for a small, rectangular metal or plastic box.
Identifying the Wiring: There should be a set of wires connected to the module, leading from the distributor or other parts of the ignition system. These wires facilitate the module’s role in ignition timing.

Tips for Replacement:

Disconnect the Battery: Safety first! Always disconnect the battery before working with the vehicle’s electrical components to prevent shocks or unintended sparks.
Note the Wire Configuration: Before detaching any wires, note down or photograph their arrangement to ensure a smooth reconnection later.
Use Appropriate Tools: Ensure you have the right tools at your disposal. A screwdriver set and possibly a socket set may be required to detach the module.

Replacing your ignition control module could restore your Cherokee’s engine performance if you’ve identified it as the issue. By following this guide, you’ll be better equipped to carry out the task with confidence. If in doubt, consulting a repair manual for your specific model year can provide additional guidance.

What is the price range for the 1985 Jeep Cherokee as listed on CarGurus?

When it comes to the 1985 Jeep Cherokee, buyers can expect to find prices ranging from $9,563 on the lower end to $14,956 on the higher end. This range reflects the current market listings, capturing both more affordable options and those at premium price points.

What features contributed to the off-road capabilities of the 1985 Jeep Cherokee?

The best part of the XJ line is that it also was faithful to the Jeep heritage by offering excellent stock off-road performance. This performance was made possible by several key features.

First, the high ground clearance allowed the 1985 Cherokee to tackle a variety of terrains with ease. Coupled with its rugged four-wheel drive, it became a force to reckon with on rugged paths.

Moreover, the innovative Quadra-Link suspension system played a crucial role. It not only enhanced the vehicle’s off-road credibility but also boosted its popularity among off-road enthusiasts.

These elements combined to ensure that the XJ line remained true to its roots while delivering outstanding capabilities that made it a standout choice for adventure seekers.

What makes the 1985 Jeep Cherokee different in terms of suspension?

The 1985 Jeep Cherokee is distinguished by its unique suspension system, which was innovative for its time and contributed significantly to its off-road prowess.

How do these features enhance off-road performance?

These features allow the vehicle to navigate various terrains effortlessly, boosting its credibility and appeal among off-road enthusiasts.

What specific features contribute to the off-road capability?

The off-road capability is enhanced by features such as elevated ground clearance, a robust four-wheel-drive system, and a specialized suspension design.

What are some common maintenance and repair issues with the 1985 Jeep Cherokee mentioned by users?

In North America, besides the Jeep, the J8S powered the Winnebago Centauri, Phasar, and LeSharo compact motorhomes. It was a lot overmatched in the motorhomes. They did their best, but constant flogging in a 6,000-pound motorhome was enough to give it a relatively short life. The diesel’s weak links showed up in hard use, typically with the head gasket and head bolts, and it had a tendency to crack pre chambers when allowed to get hot. The head gasket issues were solved about the time Jeep ceased using the engine.

When it comes to the 1985 Jeep Cherokee, users have shared insights into their maintenance journeys. Owners report that despite the challenges, the vehicle’s longevity is impressive. Common repair issues include the replacement of essential components like the radiator and water pump. Ignition system parts such as plugs, wires, cap, and rotor also frequently require attention. Moreover, rear shocks tend to wear out over time, necessitating replacement.

These repairs, while somewhat expected for a vehicle of this vintage, highlight the durability and resilience of the Cherokee. Owners have noted that while some quick fixes are needed here and there, the vehicle remains a reliable companion for daily commutes and weekend adventures, even after decades on the road.

What is the owner’s perspective on the vehicle’s power and functionality with a smaller engine?

Despite having a smaller 2.5-liter engine, the vehicle is deemed to have adequate power for everyday tasks, such as commuting and running errands around town, which satisfies the owner’s needs.

What is the personal experience of maintaining a long-term, older Jeep vehicle?

Maintaining an older Jeep involves routine repairs and replacements, which are expected with age. However, owners often find satisfaction in the vehicle’s continued performance and the manageable nature of the maintenance required.

How reliable is the 1985 Jeep Cherokee after many years of use?

The vehicle demonstrates significant reliability, having been in use for 25 years and still providing dependable service for daily commuting and weekend driving, even with its age.

What are common parts that may need replacement in a 1985 Jeep Cherokee over time?

Over time, a 1985 Jeep Cherokee might require the replacement of components like the radiator, water pump, spark plugs, ignition wires, distributor cap and rotor, and rear shocks. These are typical parts that may need attention as the vehicle ages.

What was the market performance of the 1985 Jeep Cherokee in its second year?

The 1985 Jeep Cherokee was an immediate hit! For its sophomore year, the Cherokee surprised industry insiders with its strong market performance as a compact sport utility vehicle. AMC had initially seen the new, smaller Cherokee as a bridge between the older models and the anticipated midsize Grand Cherokee, but it quickly carved out its own niche, selling well beyond expectations.

For 1985, an oil burner was added to the available options, coming from across the pond in the form of a Renault2.1L inter-cooled turbo diesel. It was available in all trim levels, including the Base, Pioneer, Chief, and Laredo, as well as the upscale Wagoneer. It could be had with any of the drivetrain options—a manual 5-speed or 3-speed automatic—and with full or part-time four-wheel drive. With the manual transmission, you could enjoy 29 MPG, and the automatic delivered 23 MPG (both EPA combined ratings). The automatic diesel delivered the same EPA MPG as the manual trans gas 2.5L four.

The combination of innovative features and robust sales cemented the Cherokee’s place in the market, making it more than just a transitional model; it became a standout in its own right.

What role did the 1985 Jeep Cherokee play in AMC’s product lineup?

The 1985 Jeep Cherokee was intended to serve as a bridge between the older, larger models and the forthcoming midsize Grand Cherokee, marking it as a transitional vehicle in AMC’s lineup.

What was the expectation of the manufacturer (AMC) regarding the Cherokee’s performance?

The robust sales of the 1985 Jeep Cherokee were unexpected for AMC, as they had not anticipated such success.

How did the 1985 Jeep Cherokee perform in the market during its second year?

The 1985 Jeep Cherokee experienced strong sales in its second year on the market.