Gasoline engine device Mazda 6 (GG)

General description of engines of models L8, LF and L3
The Mazda 6 is equipped with modern new generation engines with improved dynamic and maintainability characteristics. The L8 engine has a displacement of 1.8 liters,...

Cylinder head cover
Fig. 2.3. Cylinder head cover: 1 – camshaft position sensor (CMP); 2 – Oil control valve (OCV) mounting hole (l3 engine); 3 – oil filler cap The cylinder head cover is...

Cylinder head
Fig. 2.4. Cylinder head: 1 – cylinder head mounting bolt; 2 – release side; 3 – inlet side; 4 – front part of the engine; 5 – angle between two valves; 6 – inlet...

Cylinder head gasket
Fig. 2.5. Cylinder head gasket: 1 – plate; 2 – gasket The cylinder head gasket is metal and has a two-layer structure (Fig. 2.5).

Cylinder block
The technological feature of the new cylinder block is that it is cast from an aluminum alloy with cast-iron cylinder liners installed inside the housing. This improves...

Crankshaft and main bearing
Fig. 2.8. Crankshafts of engines of models L8, LF and L3: 1 – drive gear The crankshafts of the L8 and LF engines are cast iron, 5-bearing, with 4 counterweights. The...

Balancing block
Fig. 2.11. Balancing block: 1 – cassette type balancing unit; 2 – balancing shaft A removable cassette type balancing unit is used in L3 engines to reduce engine...

The principle of operation of the balancing unit
Fig. 2.12. Operating principle of the balancing unit: 1 – adjusting gasket; 2 – crankshaft; 3 – front part of the engine; 4 – balancing unit housing; 5 – counterweights;...

Crankshaft torsional vibration damper
Fig. 2.14. Crankshaft torsional vibration damper: 1 - vertical projection; 2 – section; 3 – toothed wheel of crankshaft pulley; 4 – pulley mounting hole; 5 – torsional...

Front engine cover
Fig. 2.15. Front engine cover: 1 - vertical projection; 2 – technological hole for fixing the tensioner lever; 3 – technological hole for unlocking the chain tensioner;...

Piston — design description
The pistons are made of heat-resistant and highly thermally conductive aluminum alloy, the piston skirt is coated with graphite to reduce friction. Fig. 2.16. Piston: 1...

Piston rings and piston pin
Fig. 2.17. Piston rings and piston pin: 1 – section of the upper ring; 2 – section of the second ring; 3 – section of oil scraper ring; 4 – side rings; 5 – expander The...

Connecting rod and connecting rod bearing
Fig. 2.18. Connecting rod and connecting rod bearing: 1 - extension; 2 – connecting rod; 3 – connector surface; 4 – connecting rod cover; 5 – connecting rod bearing The...

Valve mechanism — general information
Fig. 2.20. Valve mechanism of Mazda 6 engines: 1 – camshaft; 2 - timing gear drive chain; 3 – camshaft sprocket; 4 – tensioner lever; 5 – chain tensioner; 6 – crankshaft...

Distributor shaft
The camshaft position (CMP) detection unit or sensor, which is integrated with the camshaft, is located in the intake camshaft on L8 and LF model engines. The camshaft...

Camshaft Sprocket
Fig. 2.23. Camshaft sprocket: 1 – camshaft sprocket; 2 – actuator for changing valve timing The design uses a camshaft sprocket made of a high-rigidity alloy, hardened...

Crankshaft sprocket
Fig. 2.24. Crankshaft sprocket: 1 – oil pump drive sprocket; 2 – timing mechanism drive sprocket; 3 – front part of the engine; 4 – outer diameter; 5 – tooth width The...

Camshaft timing chain
Fig. 2.25. Timing chain: 1 – camshaft sprocket; 2 – tensioner lever; 3 – chain tensioner; 4 – chain guide; 5 – crankshaft sprocket; 6 – drive chain timing mechanism; 7 –...

Drive chain tensioner timing mechanism
Fig. 2.26. Timing chain tensioner: 1 – ratchet mechanism hole; 2 – oil supply hole; 3 – check valve; 4 – piston spring; 5 – piston; 6 – toothed rack; 7 – ratchet; 8 –...

Valve, valve spring, valve stem seal, valve guide
Fig. 2.27. Valve components: 1 – valve cracker; 2 – upper valve spring plate; 3 – valve spring; 4 – oil deflector cap; 5 – valve guide bushing; 6 – valve The valves are...

Valve lifter
Fig. 2.28. Valve mechanism operation diagram: 1 – valve tappet; 2 – camshaft; 3 – valve tappet section; 4 – contact surface of the cam contour; 5 – valve stem contact...

Variable valve timing mechanism
Fig. 2.29. Diagram of the valve timing mechanism: 1 – torque; 2 – engine speed; 3 – low and medium speed engine; 4 – high speed engine; 5 – engine with variable valve...

Variable valve timing system
The variable valve timing system continuously modifies the phases of the variable valve timing actuator and the intake camshaft under the action of hydraulic pressure,...

Operation diagram of the variable valve timing mechanism
Fig. 2.31. Structural diagram of the valve timing mechanism: 1 – crankshaft position sensor; 2 – camshaft position sensor; 3 – PCM block; 4 – Oil control valve (OCV); 5...

Main characteristics of the variable valve timing mechanism
The variable valve timing actuator has two hydraulic chambers: a valve advance chamber and a valve retard chamber. The chambers are located between the integrated...

Design of the variable valve timing mechanism
Fig. 2.36. Design of the variable valve timing mechanism: 1 – camshaft sprocket; 2 – body; 3 – rotor; 4 – pin; 5 – seal; 6 – lid; 7 – groove The variable valve timing...

Oil Control Valve (OCV)
Fig. 2.37. Design of the oil control valve (OCV): 1 – spool valve; 2 – spiral; 3 – plunger; 4 – return spring The oil control valve (OCV) consists of a spool valve that...

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Mazda6 GG (2002-2008)