Automobile brand Mazda, in the period from 1985 to 2005, completed the line of its products with internal combustion engines of the famous B-series, in various versions. So, on working volumes, they were divided into motors 1.1 – 1.8 liters, could have eight or sixteen valves. All versions received cylinder blocks made of cast iron, the timing was completed with belt drives.
This family includes about two dozen modifications, including turbocharged motors, which were equipped with charged versions of Mazda of the 90’s and their American clones, produced by Ford.
All the above-mentioned engines belong to the group of “ventless”. A broken timing belt did not lead, in such versions, to the pistons hitting the valves. The compression ratio of these engines is insignificant, ≤9.5, which explains the presence of a spacious CC, and the pistons have special notches for safe lowering of valves into them.
The 1.6L B6ZE engine was put only on the first two generations of Mazda models, including MX-5, produced for European markets. In fact, it is a modernized version of the B6D, 1989, created for MX-3, Familua.
The engine for MX-5 was installed on the car longitudinally, equipped with a flywheel of lightweight type. had an intake manifold, the so-called passive type, EGR system. It should be recalled that for engines with volumes of 1,8/1,6, including those that were put on the MX-5 model were equipped with intake manifolds of a different design, with variable geometry. There were no phase shifters, available on the 1.8-liter engines mounted on the MX-5. It is important to understand that these engines are not related to the Z6 1.6 version of the Mazda-3. This internal combustion engine, in all modifications, was put on Mazda of the following models: 323, 323F, versions MX-3, MX-5, on Xedos-6.
Technical characteristics
| Characteristics | Value |
|---|---|
| Engine displacement, cc | 1597 |
| Maximum power, hp | 90 – 125 |
| Maximum torque, Nm (kgm) at rpm | 129 (13) / 4000 137 (14) / 4500 137 (14) / 5500 139 (14) / 5000 142 (14) / 5000 |
| Fuel used | Gasoline Regular (AI-92, AI-95) |
| Fuel consumption, l/100 km | 6.8 – 9.8 |
| Engine type | Row, 4-cylinder |
| Additional engine information | DOHC |
| Maximum power, hp (kW) at rpm | 90 (66) / 6000 110 (81) / 6000 120 (88) / 6500 125 (92) / 6500 |
| Compression ratio | 9.4 |
| Cylinder diameter, mm | 78 |
| Piston stroke, mm | 83.6 |
| Cylinder displacement change mechanism | No |
| Cooling system, l | 6 |
| Engine lubrication system, l | 3.6 |
| Valve drive | DOHC |
| Number of valves per cylinder | 4 |
Mazda 1,6 internal combustion engine – guaranteed reliability in any modifications
The considered design is extremely reliable and simple, has a significant resource. Certainly, 110 “horses” 1,6-liter version is obviously not enough for dashing races even light version of the car, such as MX-5. Dynamics allows, in the best case, to make walks on it. It’s clearly not suitable for racing. But breakage of timing on such engine does not lead to engine failure. On the very first versions of MX-5 there was a problem, often leading to breakdowns. The toothed pulley of the crankshaft was spontaneously loosened, which led to the breakage of the key. For a certain period of time (1999), cars with crankshaft thrust rings that were originally defective came off the assembly line. Such growth difficulties have long been overcome.
Causes why the engine does not start
The most common is the short circuit of the control unit, located under the mat in the feet of the passenger in the front seat. Getting wet, the mat lets moisture to the ECU. Initially there are difficulties with the wiring, then the whole unit stops working.
Crankshaft position sensor
The device reads information from a special disk located behind the crankshaft pulley that drives the attachment. If the sensor is defective, the engine starts to stall when driving, or does not start at all. A frequent cause of failure is a short circuit in the wiring, which occurs in the tail part of the sensor. The ECU fixes and gives a specific error.
Air suction is observed
The ECU unit measures the load, focusing on the flow meter indicators, which significantly increases the sensitivity of the engine to the resulting suction. Information about the depleted fuel-air mixture is passed. The problem may lie in a faulty gasket installed on the intake manifold, violation of the tightness of the seals of the injectors, there is a possibility that the hose of the VGC system has burst.
Throttle valve
Motors of the modifications under consideration are equipped with a mechanical one. Information about its position on the ECU is transmitted by a potentiometric sensor. At the bottom, directly under the throttle, is located the idle valve. It represents a spool, for the movement of which the solenoid is responsible. This is a very problematic area. Malfunctions occurring here lead to the fact that the motor idles smoothly does not hold, or stalls in this mode. Occasionally, cleaning of the valve channels helps to eliminate the problem. But more often the problem is in the solenoid. In this case, the valve needs to be replaced.
The idle speed can be adjusted with a special screw placed on the throttle.
EGR valve
The device practically does not cause problems. From time to time, the error RO402 may appear, indicating that the flow of exhaust gases is excessive. Easily remedied by cleaning the valve itself.
Ignition coil
A pair of dual coils is the backbone of the ignition system. This is the standard for engines manufactured in the nineties. Each coil supplies spark to a pair of spark plugs at once. The first, at the end of the compression stroke. In the second, at the end of the exhaust stroke (idle).
The service life of such products is significant. Especially considering the fact that most MX-5s are used in gentle operating modes. In case of coil wear, even one, the occurrence of spark breakdown through the high-voltage wire, the engine functions extremely poorly during acceleration and idling. The primary coil in good condition has a resistance of ≤1 ohm, the values on the secondary coil are set in the range of 11.2-15.2 kOhm.
Camshaft position sensor
For the intake shaft, it is located in the front of the valve cover. The product itself functions without problems, but its seals over time begin to leak oil.
Valve cover gasket
This element of the design is made of light alloys, is characterized by high reliability and durability. allows painting in any color. It is installed on the gasket made of rubber, sealing spark plug wells, the perimeter of the valve cover.
Over time, the rubber loses elasticity. From under it begins to leak oil. In this case, the gasket is changed.
Valve clearances
Engines of the model under consideration do not have hydrocompensators. Adjustment of thermal gaps is carried out using special washers, allowing their easy extraction from under the cams of the camshaft. However, for this purpose, the shafts are lifted, having previously lowered the rods. Nominal value of thermal clearances: exhaust valves – 0.31, plus / minus 0.03 mm. for the valves inlet – 0.21 mm.
Timing belt
Designed to be replaced every 90000 kilometers. With a longitudinal configuration of the motor, for its replacement, it will require preliminary disassembly of the front facade, followed by the removal of the pump.
All available pairs of marks are located on the pulleys. A special tool will not be required. Loosen the pulleys will also not be required.
Total
Engines from the eighties and nineties were characterized by simplicity, unpretentiousness and reliability. The heavier modern cars, sharply increased environmental requirements, the desire of car owners to buy cars with more power led to the emergence of new technical solutions.