1998 Pontiac Grand Prix

1998 Pontiac Grand Prix

The 1998 Pontiac Grand Prix is a mid-size sedan that was offered with a variety of engine and transmission options. The base engine was a 3.8L V6 that produced 200 horsepower and 225 lb-ft of torque. Other engine options included a 3.1L V6, a 3.8L supercharged V6, and a 5.0L V8. Transmission options included a 4-speed automatic transmission, a 5-speed manual transmission, and a 6-speed manual transmission.

People who like the 1998 Pontiac Grand Prix praise its powerful engines, sporty handling, and comfortable interior. However, some people have complained about the vehicle’s reliability and fuel economy.

Engine

3.1L V6

• Leaking intake manifold gasket: Oil or coolant leaking from the intake manifold gasket. Replace the intake manifold gasket. $500 - $800+

3.8L V6

• Blown head gasket: Loss of coolant, overheating, rough running. Replace the head gasket. $1,000 - $2,000+
• Cracked intake manifold: Vacuum leak, loss of power. Replace the intake manifold. $500 - $800+
• Water pump failure: Coolant leak, overheating. Replace the water pump. $500 - $800+

3.8L supercharged V6

• Supercharger oil leak: Oil leak from the supercharger. Replace the supercharger oil seal. $500 - $800+

5.0L V8

• No known issues

Transmission

4-speed automatic transmission

• Slipping gears: Transmission slipping or not engaging in gear. Rebuild or replace the transmission. $1,500 - $3,000+
• No known issues

5-speed manual transmission

• No known issues

6-speed manual transmission

• No known issues

Suspension

• Worn sway bar links: Clunking noise when driving over bumps or turning. Replace the sway bar links. $300 - $500+
• Worn strut mounts: Clunking noise when driving over bumps. Replace the strut mounts. $500 - $800+

Electrical

• Battery drain: Battery drains overnight or when the car is turned off. Replace the battery or find and fix the electrical drain. $100 - $500+
• No known issues

Exterior

• No known issues

Interior

• Broken seat adjuster: Seat adjuster breaks, preventing the seat from being adjusted. Replace the seat adjuster. $500 - $800+
• No known issues

Summary

The 1998 Pontiac Grand Prix is a powerful and sporty sedan that can be reliable when properly maintained. However, the vehicle has some potential issues that can be expensive to fix. Some of the most common issues include a leaking intake manifold gasket, a blown head gasket, and a slipping transmission.