Hyundai D4BH 2.6 Diesel Engine

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Hyundai D4BH 2.6 Diesel Engine For Sale

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Hyundai D4BH 2.6 Diesel Engine Specs

Specification Details
Fuel Type Diesel
Displacement 2.6 L
Valvetrain SOHC
No. of valves 8
Power Output in KW 80 KW
Torque Output 215 Nm
Bore x Stroke 91.1 mm x 100 mm
Compression Ratio 22.5:1

Hyundai D4BH 2.6 Diesel Engine FAQ

About The Engine Hyundai, KIA D4BH

The Korean engine builders of the largest corporation Hyundai Motor Company created the D4BH engine. During development, the 4D56T motor was taken as the basis. The brand of the power unit D4BH stands for D4B - a series, H - the presence of a turbine and an intercooler. The engine was created in the 90s of the last century. Designed for installation on SUVs, commercial vehicles and minivans.
  • The D4BH power unit is characterized by economical fuel consumption and a low content of harmful substances in the exhaust.
  • The cylinder block is cast iron, lined. In-line, 4-cylinder. Sleeves are "dry", made of steel. Exhaust manifold material cast iron.
  • The cylinder head and intake manifold were made of aluminum alloy. Swirl-type combustion chambers.
  • Pistons are standard aluminum. They have two compression rings and one oil scraper.
  • Crankshaft steel, forged. The fillets are knurled hardened.
  • There are no hydraulic compensators, the thermal clearances of the valves are regulated by the selection of the length of the pushers (until 1991 - washers).
  • Balancing shafts are used to dampen second-order inertial forces.
  • The injection pump until 2001 had a fully mechanical control. After 2001 began to be equipped with electronic.
  • The timing drive is combined with the injection pump drive and is carried out by a common toothed belt.
The engine, unlike others, is equipped with an RWD / AWD drive. This means that it can be used in both rear-wheel drive (RWD) and automatically connected all-wheel drive (AWD) vehicles without additional modifications.


Manufacturer KMJ
Engine volume, cm³ 2476
Power, hp 94-104
Torque, Nm 235-247
Compression ratio 21
Cylinder block cast iron
cylinder head aluminum
Number of cylinders four
Location of the first cylinder TVE (crankshaft pulley)
Cylinder diameter, mm 91.1
Piston stroke, mm 95
Valves per cylinder 2 (SOHC)
Timing drive belt
Reduction of vibration loads balancing shafts
Valve timing control No
Turbocharging turbine
hydraulic lifters -
Fuel supply system intercooler, direct fuel injection
Fuel DT (diesel)
Lubrication system, l 5.5
The order of operation of the cylinders 1-3-4-2
Ecology norm Euro 3
Location longitudinal
Peculiarities RWD/AWD drive
Resource, thousand km 350+
Weight, kg 226.8

Reliability, problems, maintainability

For a subjective assessment of the engine, one technical characteristic is not enough. Additionally, several more characterizing factors should be analyzed.


All owners of cars with the D4BH engine note its high reliability and a significant excess of the mileage. At the same time, they focus on the issues of proper operation, timely maintenance and compliance with the manufacturer's recommendations.

Weak spots

Every engine has weaknesses. D4BH is no exception in this regard. One of the main drawbacks is the low resource of the drive belt of the balancing shafts and the vacuum pump. The consequences of the breakage cause the splines of the generator shaft to be cut off and the rear bearing to be destroyed. To avoid such serious problems, it is recommended to replace the belt after 50 thousand kilometers of the car. The timing belt requires close attention. Its breakage is dangerous by bending the valves. And this is already a fairly tangible budget engine repair. With long runs (after 350 thousand km), cracking of the cylinder head in the area of ​​​​the vortex chamber was repeatedly noted. Malfunctions such as oil leakage from under gaskets and seals occur, but they do not cause great danger if they are detected and eliminated in a timely manner. The rest of the diesel equipment does not cause problems. Timely and high-quality maintenance is the key to exceeding the declared mileage resource.


The need for a major overhaul arises after a run of 350 - 400 thousand km. The maintainability of the unit is high. First of all, this is facilitated by a cast-iron cylinder block and steel liners. Boring them to the required repair size is not difficult. It is not difficult to purchase any parts and assemblies for replacement, both original and their analogues. Spare parts in any assortment are available in almost any specialized auto shop. For those who want to reduce the cost of repairs, it is possible to purchase any used spare part at numerous auto dismantling sites. True, in this case, the quality of the goods is in great doubt. As experienced motorists note, do-it-yourself overhauls are not uncommon. If you have a complete set of tools and the necessary knowledge, you can safely take on this job. But, it must be borne in mind that the engine, although simple in design, still has certain nuances. For example, the D4BH oil pump does not differ in appearance from the D4BF oil pump. But if they are confused during repair, the alternator belt is broken (due to misalignment of the crankshaft and alternator pulleys).
Despite the fact that major repairs are not very difficult, it will be much better if it is entrusted to specialists.
It is proposed to watch the video "Replacing the valve cover gasket on D4BH"

Engine tuning

The issue of tuning internal combustion engines has caused a lot of debate among the owners of cars with such an engine. The D4BH motor is equipped with a turbine and an intercooler. This creates the prerequisites for the fact that it becomes very difficult to carry out tuning. Theoretically, you can pick up a turbine with a higher pressure and replace the existing one with it. But its installation will cause significant structural changes in the engine, and, consequently, high material costs. Turbine power is used by about 70% (at least in this engine). So there is an opportunity to increase it. For example, by flashing the ECU, or, as they say now, to do chip tuning. But here lies one unpleasant surprise. Its essence lies in a sharp decrease in the resource of the power unit. Thus, increasing engine power by 10-15 hp. you will reduce its mileage by 70-100 thousand km. There is almost nothing to add to what has been said. It is known that the manufacturer pre-selects the version of the turbine before installing it on the engine, which will be installed on a truck, minivan or SUV. Often, many motorists want to do engine tuning based on the desire to only increase the comfort of driving. But to achieve this goal, it is not at all necessary to redo the engine, reflash the ECU. It is enough to install a DTE Systems PedalBox gas pedal booster on the car. It connects to the gas pedal circuit. Re-flashing the car's ECU is not required. It is noted that the increase in engine power is almost not felt, but the car behaves as if the engine has become much stronger. The PedalBox booster can only be used on vehicles with electronic throttle control. On the face - gentle tuning of the internal combustion engine.


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