Is the RZ4E Isuzu Engine Imported?
4 Answers
RZ4E Isuzu engine is a domestically produced engine, manufactured by Jiangxi Isuzu Engine Company in China. The RZ4E engine is Isuzu's latest generation diesel engine, with a displacement of 1.898L, a maximum power of 120kW, and a maximum torque of 360Nm. For daily maintenance of the RZ4E engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, SD--SF grade gasoline engine oil should be selected based on the additional devices of the intake and exhaust systems and usage conditions; for diesel engines, CB--CD grade diesel engine oil should be selected according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements; Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, its performance deteriorates, which can cause various problems for the engine. To avoid malfunctions, the oil should be changed regularly based on usage conditions, and the oil level should be kept moderate; When engine oil passes through the fine holes of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and the oil cannot pass through the filter element, the filter element may burst or the safety valve may open, allowing oil to bypass through the bypass valve, bringing contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination; Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from part wear to form sludge. When the amount is small, it remains suspended in the oil; when the amount is large, it precipitates from the oil, clogging the filter and oil passages, making engine lubrication difficult and causing wear; Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.
As an experienced driver with decades behind the wheel, I've seen the Isuzu RZ4E engine used in many vehicles. Nowadays, localized production is common - for instance, there are joint venture factories manufacturing them in China, not all are imported from Japan. The Isuzu pickup trucks I've driven likely used a mix of local and imported engine components, but overall quality remained stable. The key factor is your vehicle's production year - newer models increasingly use local manufacturing to cut costs. Earlier imported models may cost more with potential spare parts shortages, but veteran drivers know durability mainly depends on regular maintenance. Don't obsess over whether it's imported - performance is comparable. What truly matters are the maintenance records and actual usage conditions.
I'm a young car owner who just bought an Isuzu D-Max equipped with the RZ4E engine. When I purchased the car, the salesperson mentioned that the engine was manufactured in Thailand because Isuzu has a factory there, so it's not considered fully imported. However, in some countries, parts might be imported from Japan. My car has been running strong for a year with reasonable fuel consumption, and whether it's imported or not doesn't make much difference. What's important is to check the vehicle's nameplate or VIN number to confirm the production location. Personally, I suggest not being fooled by the 'imported' label—locally assembled models are more cost-effective and easier to maintain. New cars are equally reliable within the warranty period, so prioritize cost-performance to save money.
Having worked in the auto repair shop for years, I've dealt with many rz4e engine issues. Most of them aren't purely imported now, like the parts we see in our shop come from Thailand or local supply chains. The engine label shows the origin, imported parts are more expensive but the performance difference is minimal. When changing oil or doing minor repairs, focusing on overall health is more important than the import label. It saves a lot on maintenance costs, novice car owners shouldn't be misled, standard repair procedures are the same, just make sure to check the cooling system and spark plugs.
