The 1987 Mack R688ST is a robust Class 8 conventional truck, a mainstay in the heavy-duty hauling industry. Produced for many years, the R-series is renowned for its rugged construction and no-nonsense approach to trucking. Its classic, no-frills conventional cab design, coupled with powerful engine options, made it a popular choice for owner-operators and fleets prioritizing durability and straightforward mechanics. While specific trims and pricing varied greatly based on configuration, the R688ST represented a dependable workhorse in its era.
The Good
The 1987 Mack R688ST offers unparalleled reliability and durability, appealing to practical buyers seeking a workhorse. Its straightforward design simplifies maintenance, while its imposing presence evokes a sense of trucking heritage, satisfying emotional connections for enthusiasts and professionals alike. Its robust build ensures longevity.
The Bad
Potential weaknesses of the 1987 Mack R688ST include its age, meaning wear and tear on components is expected. Older electrical systems can be prone to issues. Fuel efficiency may not match modern standards, and cabin comfort, while functional, lacks the amenities of contemporary trucks. Rust can also be a concern depending on its operating environment.
1987 Mack R688ST: Quick Overview
- Engine Options: The 1987 Mack R688ST was typically powered by Mack's own E6 or E7 series engines. These were robust, inline-six diesel engines designed for heavy-duty applications. Common displacement options included around 10.4 liters (E6) and 11.9 liters (E7). Cummins and Detroit Diesel engines were also sometimes specified as alternatives, depending on customer preference and fleet standardization.
- Horsepower: Horsepower ratings varied significantly based on the specific engine and its tuning. For the Mack E6 and E7 engines, power output generally ranged from approximately 250 horsepower to over 400 horsepower. Higher horsepower variants were typically reserved for specialized hauling applications requiring more grunt.
- Fuel Economy: Specific MPG figures for a truck of this era are highly variable and dependent on load, terrain, driving style, and engine configuration. However, as a Class 8 truck, fuel economy would have been in the range of 4-7 miles per gallon.
- 0-60 Times: 0-60 mph times are not a relevant metric for this class of heavy-duty truck, which is designed for sustained hauling rather than rapid acceleration. These trucks are built for torque and pulling power, not speed.
- Towing Capacity: Towing capacity is determined by the truck's configuration (axles, suspension, drivetrain) and is classified by Gross Vehicle Weight Rating (GVWR) and Gross Combination Weight Rating (GCWR). The R688ST was capable of handling typical heavy-duty trucking needs, with GCWRs often exceeding 80,000 pounds, and in some configurations, much higher for specialized long-haul or heavy-haul operations.
- Trim-Level Features: The R688ST was primarily known for its functional rather than luxurious trims. The focus was on durability and ease of maintenance. Key features included a sturdy steel cab, a large, unobstructed dashboard for instrumentation, and a spacious cabin layout. Options typically revolved around seating material, auxiliary lighting, and specialized PTO (Power Take-Off) units for specific vocational uses like dump trucks or mixers. Air conditioning and power steering were common but could be optional on some base configurations.
1987 Mack R688ST Specifications
Vehicle Information
| Year | 1987 |
| Make | Mack |
| Model | R688ST |
| Trim | - |
| Style | - |
| Type | Truck |
| Category | Heavy Truck |
Manufacturing Details
| Made In | Canada |
| Manufacturing City | OAKVILLE |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | 330001 pounds |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 11L I6 |
| Engine Size | 11L |
| Engine Cylinders | 6 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
Vehicle History Report
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Analysis
Analysis
What Problems Does the 1987 Mack R688ST Have?
As a vehicle from 1987, the 1987 Mack R688ST is subject to the common concerns associated with aging heavy-duty trucks. While Macks of this era are generally lauded for their robust build quality and mechanical simplicity, long-term ownership can reveal a range of issues. Frequently reported problems often revolve around the wear and tear of age-specific components. The electrical system, particularly wiring harnesses and connections, can degrade over time, leading to intermittent electrical faults, issues with gauges, lights, or engine controls. Given the age, corrosion is also a significant concern, especially in regions with harsh climates or exposure to road salt. This can manifest as rust on the chassis, cab panels, and fuel tanks, potentially compromising structural integrity and requiring extensive repairs.
Engine and transmission components, while built to last, will eventually require attention. Injector pump issues, turbocharger wear, and clutch wear are not uncommon in high-mileage vehicles. The venerable Mack E6 and E7 engines are generally reliable, but maintenance history is paramount. Cooling system components, such as radiators and water pumps, can also develop leaks or fail over time. Air brake systems, a critical safety feature on heavy trucks, require regular inspection and maintenance to ensure proper function. Leaks in air lines, malfunctioning brake chambers, or issues with the air compressor can arise due to age and wear. Specific model year recalls for the 1987 R688ST are not as readily available as for modern vehicles, but it's crucial to check any applicable safety recalls through official channels if purchasing a used unit. Long-term reliability hinges heavily on the truck's maintenance history, operating conditions, and the quality of any past repairs. A well-maintained R688ST can still offer many years of service, but potential buyers should be prepared for ongoing maintenance and occasional component failures due to its age.
Engine and transmission components, while built to last, will eventually require attention. Injector pump issues, turbocharger wear, and clutch wear are not uncommon in high-mileage vehicles. The venerable Mack E6 and E7 engines are generally reliable, but maintenance history is paramount. Cooling system components, such as radiators and water pumps, can also develop leaks or fail over time. Air brake systems, a critical safety feature on heavy trucks, require regular inspection and maintenance to ensure proper function. Leaks in air lines, malfunctioning brake chambers, or issues with the air compressor can arise due to age and wear. Specific model year recalls for the 1987 R688ST are not as readily available as for modern vehicles, but it's crucial to check any applicable safety recalls through official channels if purchasing a used unit. Long-term reliability hinges heavily on the truck's maintenance history, operating conditions, and the quality of any past repairs. A well-maintained R688ST can still offer many years of service, but potential buyers should be prepared for ongoing maintenance and occasional component failures due to its age.
How long will the 1987 Mack R688ST last?
Estimating average mileage for a 1987 Mack R688ST is challenging due to its commercial nature, with many vehicles accumulating well over a million miles over their service life. Well-maintained R688STs, especially those used for line hauling, could see 15-20 years or more of active service. Long-term durability is a strong suit; Mack's reputation for robust construction means the chassis and basic structure can endure for decades. However, weaknesses emerge over time, primarily in wear-and-tear components like the engine, transmission, suspension, and electrical systems. Regular, diligent maintenance is the absolute key to maximizing its lifespan. Neglect will lead to premature failure of critical parts, significantly shortening its serviceability and increasing repair costs.
What Technology & Safety Features are Included?
The 1987 Mack R688ST represents a period where technology in heavy-duty trucks was focused on functionality and driver utility rather than advanced digital integration. Built-in tech was minimal by today's standards. Entertainment typically consisted of an AM/FM radio, possibly with an 8-track or cassette player as an optional upgrade. There were no advanced infotainment systems, touchscreens, or integrated navigation. The dashboard was designed for clear visibility of essential gauges: speedometer, tachometer, engine temperature, oil pressure, fuel level, and air brake pressure gauges. These were analog and robust.
Driver-assistance features were virtually non-existent in the modern sense. Features like cruise control might have been available as an option, but advanced aids such as lane departure warnings, adaptive cruise control, or blind-spot monitoring were not conceived for this vehicle class at the time. The primary focus was on the driver's direct control and awareness of the road and vehicle.
Safety features were centered on passive safety and robust mechanical systems. Standard safety equipment would have included heavy-duty seatbelts, powerful headlights and taillights, and the critically important air brake system, which provided reliable stopping power for heavy loads. Visibility from the conventional cab was generally good due to the large windshield and side windows. However, features like airbags were not standard, and side-impact protection was limited to the structural integrity of the steel cab itself. Crash-test ratings, as we understand them for passenger vehicles today, were not typically performed or publicly disclosed for heavy-duty commercial trucks like the R688ST in 1987. The design philosophy emphasized brute strength and driver awareness as the primary safety mechanisms. Optional features related to safety might have included enhanced lighting packages or specialized mirrors for improved sightlines.
Driver-assistance features were virtually non-existent in the modern sense. Features like cruise control might have been available as an option, but advanced aids such as lane departure warnings, adaptive cruise control, or blind-spot monitoring were not conceived for this vehicle class at the time. The primary focus was on the driver's direct control and awareness of the road and vehicle.
Safety features were centered on passive safety and robust mechanical systems. Standard safety equipment would have included heavy-duty seatbelts, powerful headlights and taillights, and the critically important air brake system, which provided reliable stopping power for heavy loads. Visibility from the conventional cab was generally good due to the large windshield and side windows. However, features like airbags were not standard, and side-impact protection was limited to the structural integrity of the steel cab itself. Crash-test ratings, as we understand them for passenger vehicles today, were not typically performed or publicly disclosed for heavy-duty commercial trucks like the R688ST in 1987. The design philosophy emphasized brute strength and driver awareness as the primary safety mechanisms. Optional features related to safety might have included enhanced lighting packages or specialized mirrors for improved sightlines.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
1987 Mack R688ST Prices and Market Value
When new in 1987, a 1987 Mack R688ST could range from approximately $60,000 to over $100,000 depending on its specific configuration, engine, transmission, and any specialized vocational equipment. As a workhorse truck, their depreciation curve is different from passenger cars. Initial depreciation was significant, but their robust build means they hold value remarkably well for commercial use. Currently, used market prices for a 1987 Mack R688ST vary drastically, from a few thousand dollars for a project truck needing extensive work, to upwards of $20,000-$40,000 or more for well-maintained, operational units, especially those in good cosmetic condition or with desirable specifications. Factors affecting resale value include engine condition, transmission health, chassis integrity (rust is a major detractor), tire condition, and overall maintenance history. Operational readiness and current emissions compliance can also impact value.
1987 Mack R688ST Cost of Ownership
Owning a 1987 Mack R688ST is generally considered costly, especially for individuals not actively engaged in commercial hauling. Insurance will be specific to commercial vehicle policies, factoring in usage, coverage needs, and the vehicle's age and value. Fuel costs are significant due to its powerful diesel engine, with fuel economy typically ranging from 4-7 MPG. Maintenance and repair are where costs can escalate. While parts are available, labor for older, heavy-duty trucks can be substantial. Routine maintenance includes oil changes, filter replacements, and brake checks. Major repairs to the engine, transmission, or chassis can be expensive. Overall, while robust, it's an investment requiring significant ongoing operational and upkeep expenditure.
1987 Mack R688ST Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
1987 Mack R688ST Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
1987 Mack R688ST Insurance
Insurance for a 1987 Mack R688ST is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1987 Mack R688ST Compare to Other Truck?
The 1987 Mack R688ST competed in the heavy-duty conventional truck market against formidable rivals such as Peterbilt 379, Kenworth W900, and International Transtar. In terms of performance and raw power, the R688ST, with its robust Mack engines, was generally on par with its peers, offering strong torque for hauling. Mack's reputation for durability and a solid chassis often gave it an edge in reliability for demanding vocational applications and long-haul routes, though Peterbilt and Kenworth were also renowned for their build quality.
When it came to features, the R688ST was typically more spartan and utilitarian compared to some of its competitors, which might have offered slightly more comfort options or advanced (for the time) cabin designs. Mack prioritized function over form, which appealed to many owner-operators who preferred simplicity and ease of repair. Price-wise, Macks were generally competitively positioned, though specific configurations could place them in a similar range to comparable Peterbilts and Kenworths. International often presented a slightly more budget-friendly option.
Alternatives to consider, depending on specific needs, include:
When it came to features, the R688ST was typically more spartan and utilitarian compared to some of its competitors, which might have offered slightly more comfort options or advanced (for the time) cabin designs. Mack prioritized function over form, which appealed to many owner-operators who preferred simplicity and ease of repair. Price-wise, Macks were generally competitively positioned, though specific configurations could place them in a similar range to comparable Peterbilts and Kenworths. International often presented a slightly more budget-friendly option.
Alternatives to consider, depending on specific needs, include:
- Peterbilt 379 / Kenworth W900: If a more premium feel, slightly more aerodynamic design, and a broader range of factory options were desired, these would be strong contenders. They often command higher resale values.
- International Transtar/Eagle: For a potentially lower initial acquisition cost, International offered robust trucks that were also popular in the commercial sector.
- Used Modern Trucks: For buyers prioritizing fuel efficiency, modern safety features, and comfort, a newer used truck (e.g., late 1990s or early 2000s models) from any of these manufacturers might offer better overall value and lower running costs, despite a higher initial price.
Final Verdict: Is the 1987 Mack R688ST a Good Truck?
The 1987 Mack R688ST is ideal for enthusiasts, collectors, or owner-operators who appreciate classic, durable, and mechanically straightforward heavy-duty trucks. It's worth buying for those who understand the cost of ownership associated with older commercial vehicles and have the mechanical aptitude or resources for maintenance and repairs. It is not recommended for the average consumer seeking daily transport or fuel efficiency. Buying an R688ST is best considered for its intended purpose: heavy hauling, specialized vocational work (e.g., logging, construction), or as a restoration project. A used model in good operational condition, with a verifiable maintenance history and minimal rust, is the most sensible purchase. Specific trims or configurations would depend entirely on the intended application, with powerful engines and robust chassis being key considerations.
Cathleen V
Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.