The Isuzu Bighorn, also known as the Trooper in some markets, was a popular 4WD SUV throughout the 1990s. Known for its ruggedness and off-road capabilities, the Bighorn became a common sight on New Zealand roads. Built from 1991 to 1998, these Bighorns offer a blend of practicality and durability, but require careful maintenance due to their age.
Common issues with the Isuzu Bighorn (1991-1998) include: • Diesel Injector Pump Issues: The 4JG2 engine is prone to injector pump failures, leading to starting and running problems. • Turbocharger Problems: The turbocharger can suffer from oil leaks and bearing wear. • Suspension Wear: Bushings and ball joints in the suspension system wear out, leading to poor handling and knocking noises. • Rust: Check for rust, especially in the sills, wheel arches, and chassis. • Electrical Problems: Age-related wiring issues can cause intermittent electrical faults.
WOF tips
When taking your Isuzu Bighorn for a WOF, pay close attention to these areas: • Suspension Components: Check for excessive play in ball joints, tie rod ends, and worn bushings. • Brake Condition: Inspect brake pads, rotors, and brake lines for wear and leaks. • Lighting: Ensure all lights are functioning correctly, including headlights, taillights, and indicators. • Tyre Condition: Check for adequate tread depth and sidewall damage. • Rust: Any significant rust affecting structural integrity will result in a WOF failure.
About the Isuzu Bighorn 6VD1
The Bighorn offered both petrol and diesel engine options, with the diesel variants particularly favoured for their torque. Common engines include the 3.1L turbo diesel (4JG2) and the 3.2L V6 petrol. The Bighorn's leaf-sprung rear suspension provided robustness for load-carrying and towing. Over its production run, different trim levels and features were introduced, offering varying levels of comfort and convenience. While generally reliable, age-related issues are common, and diligent maintenance is key to keeping these vehicles running smoothly.
Questions owners ask
What are the most common engine problems to look out for in a 1991-1998 Isuzu Bighorn in New Zealand?
For the diesel variants, particularly those with the 4JG2 engine, injector pump failures are a common issue, leading to starting and running problems. Turbocharger problems, such as oil leaks and bearing wear, are also frequently reported. The 3.2L V6 petrol engine is generally robust but age-related wear and tear can occur.
Where can I get replacement suspension components for my 1991-1998 Isuzu Bighorn in NZ?
CARFIX stocks 227 SKUs for the Isuzu Bighorn (1991-1998), including various suspension components like bushings and ball joints. You can browse our selection online or visit a CARFIX store to find the parts you need for your leaf-sprung rear suspension.
What should I check on my Isuzu Bighorn (1991-1998) before its WOF inspection?
Before your WOF, pay close attention to suspension components for excessive play in ball joints, tie rod ends, and worn bushings. Inspect brake pads, rotors, and brake lines for wear and leaks. Ensure all lights are functioning, and check tyre tread depth and sidewall condition. Crucially, any significant rust affecting structural integrity, especially in the sills, wheel arches, and chassis, will result in a WOF failure.
Is rust a big problem for the 1991-1998 Isuzu Bighorn in New Zealand?
Yes, rust is a common issue for the 1991-1998 Isuzu Bighorn due to its age. You should thoroughly check for rust, especially in critical areas like the sills, wheel arches, and chassis, as this can impact structural integrity and WOF compliance.
How often should I service my Isuzu Bighorn (1991-1998)?
The recommended service interval for the Isuzu Bighorn (1991-1998) is every 10,000km. Regular maintenance is crucial for these vehicles, especially given their age, to address common issues like suspension wear and potential electrical problems.
What are the signs of a failing injector pump in a 4JG2 diesel Bighorn?
Signs of a failing injector pump in the 4JG2 diesel engine can include difficulty starting, rough idling, reduced power, excessive smoke from the exhaust, and increased fuel consumption. These issues are often intermittent at first but tend to worsen over time.