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 4JG2-T
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, especially the diesel?
For the diesel 4JG2 engine in the 1991-1998 Isuzu Bighorn, common issues include injector pump failures, which can cause starting and running problems. Turbocharger problems, such as oil leaks and bearing wear, are also frequently reported.
What should I check on my Isuzu Bighorn (1991-1998) before its WOF inspection in New Zealand?
When preparing your 1991-1998 Isuzu Bighorn for a WOF, pay close attention to suspension components like ball joints, tie rod ends, and bushings for excessive play. Inspect brake pads, rotors, and lines for wear and leaks. Ensure all lights are working, check tyre tread depth and sidewall condition, and thoroughly inspect for any significant rust, especially in the sills, wheel arches, and chassis, as this can lead to a WOF failure.
Where can I get replacement suspension parts for my 1991-1998 Isuzu Bighorn in NZ?
CARFIX stocks 335 SKUs for the 1991-1998 Isuzu Bighorn. You can find replacement suspension components like bushings and ball joints, which are common wear items for this vehicle, directly through CARFIX in New Zealand.
How often should I service my 1991-1998 Isuzu Bighorn?
The recommended service interval for your 1991-1998 Isuzu Bighorn is every 10,000km. Given the vehicle's age, diligent and proactive maintenance is crucial for its longevity, especially for components like the diesel injector pump or turbocharger.
Are there any specific rust spots I should check on my 1991-1998 Isuzu Bighorn?
Yes, rust is a common issue on the 1991-1998 Isuzu Bighorn. You should particularly check the sills, wheel arches, and chassis for any signs of corrosion. Significant rust in these areas can compromise structural integrity and lead to WOF failure.
My 1991-1998 Isuzu Bighorn has a knocking noise from the suspension. What could it be?
A knocking noise from the suspension of your 1991-1998 Isuzu Bighorn is often indicative of worn suspension components. Common culprits include worn bushings and ball joints, which are known to wear out on these vehicles and can lead to poor handling.