Engine 1.7 CDTi, indestructible Isuzu unit, known from the Opel Astra. Should I bet on a car with 1.7 CDTi?

The legendary 1.9 TDI is a symbol of reliability among diesel engines. Many manufacturers wanted to match this design, so new designs emerged over time. These include the well-known and appreciated 1.7 CDTi engine.

Isuzu 1.7 CDTi engine - technical data

Let's start with the most important numbers that apply to this unit. In the initial version, this engine was marked as 1.7 DTi and had a Bosch injection pump. This unit had a power of 75 hp, which was sufficient achievement for many drivers. However, over time, the fuel supply system has been upgraded. The injection pump was replaced with a Common Rail system, and the engine itself was called 1.7 CDTi. A different method of fuel injection made it possible to achieve better power indicators, which ranged from 80 to 125 hp. The last 2010 variant had 130 hp but was based on Denso injection.

Opel Astra with 1.7 CDTi engine - what's wrong with it?

The oldest design based on injection pumps is still considered extremely durable. However, it should be remembered that these units may already be heavily exploited. Newer Common Rail versions may require costly regeneration or replacement of the injectors. However, Bosch products installed on this engine are no less durable than on other cars. Therefore, it is worth considering the quality of refueling fuel.

Weaker units may have a problem with an oil pump that has damaged seals. It is worth looking at this element when inspecting a car.

Speaking of elements that can fail, the particulate filter should also be mentioned. The DPF has been fitted to the Zafira since 2007 and other models since 2009. Cars operated only in urban areas may have a big problem with its clogging. The replacement is very expensive and can exceed 500 euros. In addition, the replacement of the dual-mass flywheel and turbocharger are standard, especially in the variable geometry version. The condition of accessories and consumables depends mainly on the driving style of the driver. Usually up to 250 kilometers nothing bad happens to the engine.

1.7 CDTi engine in Honda and Opel - how much does a repair cost?

The main parts of the brake system or suspension are not the most expensive. For example, a set of discs and pads for front and rear should not exceed 60 euros for good quality components. Repair of the drive and its accessories is the most expensive. Diesel engines aren't the cheapest to maintain, but they make up for it with long, trouble-free driving. As mentioned above, it is recommended to look for versions of the engine with a Bosch fuel injection system. Replacing Denso components is even several times more expensive.

Turbochargers with fixed blade geometry are also more durable. Regeneration of the element costs about 100 euros. In the variable geometry version, the turbine control valve also likes to stick. Troubleshooting will cost a little over 60 euros When replacing a dual mass, you should expect an amount close to 300 euros Also the oil pump may be faulty, the repair cost of which can reach 50 euros

Diesel from Isuzu - is it worth buying?

The 1,7 CDTi engine is considered one of the most durable and reliable designs. According to many drivers, cars with these units work very well. It is worth noting that this is not the best choice for lovers of quiet engine operation. Regardless of the power version and year of manufacture, these units are quite noisy. They also have a slightly different torque curve, resulting in the need to "twist" them at a slightly higher rpm level. Apart from these inconveniences, cars with 1.7 CDTi engine are considered very successful and worthy of purchase. The main thing is to find a well-preserved copy.

1.7 CDTi engine - summary

The described Isuzu engine has the remains of older designs that are still valued for their high reliability. Of course, there are fewer and fewer comfortable apartments on the secondary market over time. If you want to buy such a car, check that the timing belt is not splashed with oil (oil pump) and that there are no disturbing vibrations when starting and stopping (double mass). Also take into account that with more than 300 kilometers, you will probably need a major overhaul soon. Until this has been done before.