| Model | MAZDA 323 | ||
| Designations | E1 | EZ | E5 |
| Release date, from - to | 85 — 87 | 85 — 87 | 85 — 87 |
| Working volume, cm³ | 1062 | 1285 | 1479 |
| Power, /kW at rpm | 40/6000 55/6000 | 44/6000 60/6000 | 55/5500 75/5500 |
| Torque, Nm at rpm | 79/4000 | 95/3500 | 122/3200 |
| Cylinder diameter, mm | 70, 0 | 77, 0 | 77, 0 |
| Piston stroke, mm | 69, 6 | 69, 6 | 80, 0 |
| Compression ratio | 9, 2 | 9, 2 | 9, 0 |
| Carburetor/injection system | carburetor | carburetor | carburetor |
| Ignition system | TSZ | TSZ | TSZ |
| Distribution mechanism drive | ONS | ONS | ONS |
| Number of valves | 8 | 8 | 8 |
| Fuel, oct. number studied. | Normal 89 | Normal 89 | Normal 89 |
| Catalyst | — | — | — |
Model | MAZDA 323 | ||
| Designations | VZ | VZ | B3 |
| Release date, from - to | 87 — 89 | 89 — 91 | 91 — |
| Working volume, cm³ | 1323 | 1323 | 1323 |
| Power, / kW at rpm hp/rpm | 44/5500 60/5500 | 49/- 67/- | 54/5500 73/5500 |
| Torque, Nm at rpm | 94/3400 | — | 105/3700 |
| Cylinder diameter, mm | 71, 0 | 71, 0 | 71, 0 |
| Piston stroke, mm | 83, 6 | 83, 6 | 83,6 |
| Compression ratio | 9, 4 | 9, 4 | 9, 4 |
| Carburetor/injection system | carburetor | injection system | injection system |
| Ignition system | TSZ | TSZ | TSZ |
| Distribution mechanism drive | ONS | ONS | ONS |
| Number of valves | 8 | 16 | 16 |
| Fuel, oct. number studied. | Normal 89¹ | Normal 89¹ | Normal 89¹ |
| Catalyst | unregulated. | adjustable. | adjustable. |
Model | MAZDA 323 | ||
| Designations | B5 | B6 | B6 |
| Release date, from - to | 87 — 89 | 85 — 87 | 86 — 91 |
| Working volume, cm³ | 1480 | 1598 | 1898 |
| Power, / kW at rpm hp/rpm | 54/5500 73/5500 | 77/6000 105/6000 | 65/5300 85/5000 |
| Torque, Nm at rpm | 113/3200 | 37/4200 | 125/2500 |
| Cylinder diameter, mm | 78, 0 | 78, 0 | 78, 0 |
| Piston stroke, mm | 78.4 | 83, 6 | 83, 6 |
| Compression ratio | 9.1 | 10.5 | 9, 6 |
| Carburetor/injection system | carburetor | injection system | injection system |
| Ignition system | TSZ | TSZ² | TSZ² |
| Distribution mechanism drive | ONS | ONS | ONS |
| Number of valves | 8 | 8 | 8 |
| Fuel, oct. number studied. | Normal 89¹ | Super 98 | Normal 89¹ |
| Catalyst | unregulated. | — | adjustable. |
Model | MAZDA 323 | |||
| Designations | B6 | BP SOHC | BP DOHC | PN |
| Release date, from - to | 91 — | 89 — | 89 — | 86 — 90 |
| Working volume, cm³ | 1598 | 1840 | 1840 | 1720 |
| Power, / kW at rpm hp/rpm | 65/5300 88/5300 | 76/5300 103/5300 | 94/6500 128/6500 | 40/47004 55/47004 |
| Torque, Nm at rpm | 132/4000 | 148/4000 | 157/4500 | 106/3000 |
| Cylinder diameter, mm | 78, 0 | 83, 0 | 83, 0 | 78 |
| Piston stroke, mm | 83, 6 | 85, 0 | 85, 0 | 90 |
| Compression ratio | 9, 0 | 8, 9 | 9, 0 | 22, 0 |
| Carburetor/injection system | injection system | injection system | injection system | Distributor. fuel injection pump |
| Ignition system | EZA³ | EZA³ | EZA³ | — |
| Distribution mechanism drive | ONS | ONS | DOHC | ONS |
| Number of valves | 16 | 16 | 16 | 8 |
| Fuel, oct. number studied. | Normal 89¹ | Super 95¹ | Super 95¹ | Diesel |
| Catalyst | adjustable. | adjustable. | adjustable. | - |
1 - unleaded
2 — TSZ transistor ignition system
3 - EZA: Electronic Ignition System
4 — from 87 to 89: 42 kW (57 hp); from 89 to 90: 41 kW (56 hp)
The Mazda 323 is equipped with a liquid-cooled, in-line, four-cylinder engine located transversely to the direction of travel.
The cylinders are built into the block cast from grey cast iron. When repairing the engine, for example, due to severe wear or grooves on the cylinder surface, the cylinders can be bored and ground. After this, pistons of a larger repair size must be installed. At the bottom of the cylinder block is the crankshaft, supported by main bearings. The connecting rods are connected to the crankshaft via plain bearings. At the bottom of the cylinder block is a sump made of sheet metal or aluminum, in which the engine oil necessary for lubrication and cooling of the engine is collected.
There are four designs of aluminum cylinder head. These differences are in the arrangement, valve timing and number of valves, as well as the number of camshafts.
Models with 1.7L diesel engine (engine designation PN) have a cylinder head with a single camshaft, which drives 2 valves per combustion chamber via rocker arms (1 inlet and 1 outlet valve). The camshaft is driven by a toothed belt. The intake and exhaust manifolds are mounted on one side of the cylinder head.
Models with 1.1 l, 1.3 l and 1.5 l petrol engines (designations (E1, E3, E5) have a cylinder head with opposite inlet and outlet ports, with one camshaft that drives 2 valves per combustion chamber via rocker arms (1 inlet and 1 outlet valve). The camshaft is driven by a chain.
Models with 1.4 l, 1.5 l, 1.6 l and 1.9 l petrol engines (designations B3, B5, B6 SOHC, BPE SOHC) have a cylinder head with oppositely located intake and exhaust manifolds with one camshaft. The camshaft, depending on the model, drives 2 or 4 valves to the combustion chamber via rocker arms (2 inlet and 2 outlet valves). The camshaft is driven by a toothed belt. Cars with 1.6 or 1.9 liter gasoline engines (designations B6 DOHC, BP DOHC) also have a cylinder head with opposite inlet and outlet ports, but with two camshafts. They drive 4 valves per combustion chamber via plate tappets (2 inlet and 2 outlet valves). The camshafts are driven by a single toothed belt.
In engines with a cylinder head with oppositely located intake and exhaust ports, fresh fuel-air mixture enters from one side of the head, and exhaust gases are released from the opposite side. Due to this arrangement, faster gas exchange and high power are ensured.
The engine is lubricated by an oil pump, which is either located on the front side of the crankcase or is located in the oil pan (engine E). It is driven directly from the crankshaft or via a chain. The sucked oil is supplied through holes and channels to the bearings of the crankshaft and camshaft, as well as to the cylinder mirror.
The water pump on B3, B5, B6, BP and PN engines is located on the end of the cylinder block. On E engines, the water pump is located on the side of the cylinder block. The pump is driven on all engines by a V-belt, which also drives the generator. One or two additional V-belts are used to drive the power steering and air conditioning. Depending on the model, either a carburetor or an electronic fuel injection system is used to prepare the working mixture, which, as a rule, does not require maintenance.
The ignition sparks are generated by a maintenance-free electronic ignition system. Depending on the model, the ignition timing may need to be checked and adjusted as part of maintenance. The ignition distributor is located on the cylinder head and is driven directly by the camshaft.
Caution! The radiator fan may turn on spontaneously when the engine is off and the ignition is on. This may happen several times due to the heat in the engine compartment. When working in the engine compartment on a hot engine, always remember that the fan may turn on. Therefore, when working in the engine compartment, the ignition should be turned off if possible.