1986 Peterbilt 359 1986 Base Straight Truck – Long Conventional

Common Issues

Owners of the 1986 Peterbilt 359 may encounter issues such as:

• Fuel system problems, including clogged filters and injectors
• Electrical system failures, particularly with older wiring
• Engine overheating due to cooling system leaks
• Transmission wear, especially in high-mileage vehicles

Maintenance Tips

To keep your Peterbilt 359 in top shape, consider the following maintenance tips:

• Regular oil changes (every 5,000 to 7,500 miles)
• Check and replace fuel filters as needed
• Inspect and maintain the cooling system periodically
• Perform routine checks on brakes and tires
• Keep the electrical system clean and connections secure

Typical Repair/Owership Cost Ranges

The costs for maintaining and repairing a 1986 Peterbilt 359 can vary widely:

• Basic maintenance (oil changes, filters): $100 - $300 per service
• Brake system repairs: $500 - $2,000 depending on parts
• Transmission rebuild or replacement: $2,000 - $5,000
• Engine overhauls can range from $5,000 to over $15,000

Buying Advice (What to Inspect)

When considering the purchase of a 1986 Peterbilt 359, inspect the following:

• Overall condition of the body and frame for rust or damage
• Engine performance and smoke emissions
• Transmission smoothness and shifting behavior
• Brakes and suspension for wear
• Electrical systems and battery condition

FAQ

What is the fuel economy of the 1986 Peterbilt 359? The fuel economy typically ranges from 7 to 10 miles per gallon, depending on load and driving conditions.

How many miles can I expect to get out of this truck? With proper maintenance, these trucks can often exceed 1 million miles.

Are parts readily available for the 1986 Peterbilt 359? Yes, many parts are available through aftermarket suppliers and specialized retailers.

What type of oil should I use for the engine? A high-quality diesel engine oil, typically 15W-40, is recommended.

How often should I perform maintenance? Regular maintenance should be performed every 5,000 to 7,500 miles or as specified in the owner’s manual.

Can I upgrade the engine? Yes, some owners choose to upgrade to more modern engines for better performance and efficiency.