We continue to talk about quite decent turbodiesels from Korea, which have a good resource and reliability. In the review we will talk about 1.7 CRDI engine.
The engine considered today is a part of the Hyundai U family and is the largest in the lineup.
The 1.7 CRDI is relatively new, it began to be produced only in 2010. This powertrain is put on: Hyundai i40, ix35, Kia Carens, Optima and Sportage. 1.7 CRDI has a cylinder block made of cast iron, the fuel injector from Bosch, as well as chain drive timing. The vast majority of engine varieties fit Euro-5 requirements, thanks to an advanced environmental system and the presence of a particulate filter.
The technical characteristics of the engine Hyundai D4FD 1.7 CRDi (Euro 5)
| Parameter | Value |
|---|---|
| Type | row |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Definite displacement | 1685 cm³ |
| Cylinder diameter | 77.2 mm |
| Piston stroke | 90 mm |
| Power system | Common Rail |
| Power | 116 – 136 hp |
| Torque | 260 – 330 Nm |
| Compression ratio | 17.0 |
| Fuel type | diesel |
| Environmental standards | Euro 5 |
Engine specifications Hyundai D4FD 1.7 CRDi (Euro 6)
| Parameter | Value |
|---|---|
| Type | row |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Definite displacement | 1685 cm³ |
| Cylinder diameter | 77.2 mm |
| Piston stroke | 90 mm |
| Power system | Common Rail |
| Power | 116 – 141 hp |
| Torque | 280 – 340 Nm |
| Compression ratio | 15.7 |
| Fuel type | diesel |
| Environmental standards | Euro 6 |
What is the reliability of 1.7 CRDI?
The Korean motor is made as simple as possible and without any complications. Among the obvious problems is the particulate filter, which starts to get capricious at a considerable kilometerage. All because it gets clogged with time, and this causes regular unsuccessful attempts of burning, which increases the level of lubricating fluid in the sump. So, more often than not, the particulate filter begins to clog by about 150 thousand kilometers of mileage. It is usually physically removed, as is the entire ecology.
Flap
Among the main elements of the ecology system is a damper, which is responsible for smooth stopping of the power unit on Euro-5 engines, as well as limiting the air supply in the course of burning. On this internal combustion engine, the flap does not cause much headache, but it gets jammed due to accumulation of deposits in the intake. So it will have to be cleaned.
EGR valve
The EGR valve of this motor is equipped with an electronic servo drive. It often suffers from the accumulation of soot deposits in the inlet. If the valve is stuck, the corresponding error will inform about it. This problem can be solved by simple cleaning. In addition, we advise you to clean the intake manifold. Tired of constant cleaning, car owners often go to the nearest service station and ask to dismantle the entire environmental system to get rid of constant problems with it.
Inlet manifold
This unit is made of plastic, inside there are flaps, driven by a servo drive connected to the axis of the flaps by means of a rod. Over time, the rod (also made of plastic) may slip from its mounting on the axle. This can cause the flaps to become loose and can slam shut in a mode where the engine needs air and the air supply is restricted.
Unfortunately, the “brains” do not record errors, because there is no position sensor. So you can understand about this problem only by the behavior of the internal combustion engine: it will work worse in some modes.
But it is easy to see the slipped rod, but it is not easy to install it back. Unfortunately, separately from the manifold, the linkage is not available on the markets, only as an assembly.
Turbocharger
The power unit under consideration today received a Garrett GTB1444VZ turbine. A similar turbine stands on the 1.6 CRDI engine. The geometry of this turbine is under the control of the vacuum actuator. But since 2015, a new turbine, still from Garrett, but already with an electronic servo-driven geometry, has been put on the internal combustion engine. No special problems with it have not been revealed. It will serve faithfully and faithfully about 250 thousand and more. But it should be understood that the turbocharger usually wears out, can press lubricant, play, make unpleasant sounds due to malfunctions in the motor itself: the fault is problems with oil, or crankcase gas ventilation.
But if the turbine suddenly stopped “blowing”, then you can realize this by loss of power and errors on underblowing. In this case, it is necessary to check the valve (35120-2A400), which is responsible for the operation of the pneumatic actuator. But there can also be the opposite situation: the turbocharger began to overblow, the problem will be found in the pneumatic valve, or in the jammed geometry.
Valve cover gasket
The cover is also made of plastic. And the gasket loses elasticity already by 200 thousand. Sometimes this can be realized by condensation under the camshaft sensor. Speaking of which, a small ring is installed under it, which can not be found on sale, it must be selected.
The timing chain
A pair of roller chains with their own hydraulic tensioners is installed in the drive. Chains should be replaced at 170 thousand mileage. But in the case of regular driving on the highway, the chains can serve much longer. It is possible to understand the necessity of replacement by loud and quite recognizable rustling.
Fuel system
This engine has an outdated fuel system, but it has not become less reliable and resourceful. The pressure is pumped by SR1H3 pump, everything is fine with it. But on a solid mileage there are diesel leaks on the oil seal. So if the lubricant slightly gives off fuel, or its level increases in the pallet, then it’s time to check the gland of the TNVD.
Injectors
Bosch injectors are immortal, except that low quality fuel is quite capable of damaging the atomizers and the seat of the shut-off valve. If this happens, the injectors will begin to excessively return fuel to the return, and this will affect the starting of the power unit. The key node is the regulator on the pump. If there are deviations in the actual pressure in the rapa – the regulator is almost certainly out of order.
Besides, once in 100-150 thousand the refractory washers will have to be replaced. In case of their wiping, gases will cause headaches when dismantling nozzles.