Mitsubishi Pajero Water in Oil — Common Issues in New Zealand
The Mitsubishi Pajero is a popular 4WD in New Zealand with known oil contamination vulnerabilities. Here is what owners need to know.
The Pajero in New Zealand
The Mitsubishi Pajero has been a fixture of New Zealand's 4WD market for decades. The NL through NT generations — particularly those fitted with the 3.2-litre 4M41 diesel — are popular with farmers, recreational users, and off-road enthusiasts. They're used in conditions that expose them to water ingestion risk.
4M41 Diesel Oil Cooler
The 4M41 diesel uses a water-to-oil heat exchanger mounted in the valley of the engine. This cooler is known to develop internal leaks on high-mileage examples, allowing coolant to enter the oil circuit. The contamination can be subtle at first — slightly elevated coolant consumption and a faint milkiness on the oil cap — progressing to full emulsification if not addressed.
River Crossing Risk
Pajero owners frequently use their vehicles for river crossings on station access and high-country tracks. The standard air intake height on a Pajero (approximately 600mm) can be exceeded in deep crossings. A raised snorkel is strongly recommended for vehicles used regularly in this environment.
Get Help
EEK Mechanical has extensive experience with Pajero oil contamination events across New Zealand. We tow your vehicle to a certified workshop and coordinate an oil manufacturer-spec fuel system recovery to 4M41 specification. Call 0800 769 000.
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