Mazda MZR 2.5L 5L-VE Engine Specs, Problems, Reliability. This 2.5-liter four-cylinder gasoline engine is an upgraded version of the 2.3-liter L3-VE engine coming from the Mazda’s L-series. The driver was presented in 2008 for Mazda6 (Atenza). A year later, it was available on the US market also (2009-2013 Mazda 6).
Like a smaller sized 2.3 l engine, the L5-VE has an aluminum alloy cylinder block with sleeves/liners cast straight into the engine block. The cylinder liners are made of 4340 steel-molybdenum alloys instead of cast iron. This product has less friction and high-heat resistance. The engine block was stroked up to 100 mm (3.94 in) and bored approximately 89 mm (3.50 in). As a result, the engine displacement is 2,488 cc or 2.5 liters. The L5-VE has actually a created steel crankshaft with 8 counterweights (like a 2.3 L DISI Turbo or L3-VDT).
There is a versatile joint in between the crankshaft and the flywheel for resonances decrease at the high and middle revs (2,000-5,000 rpm) of the engine. The L5 engine has a cassette type balancer unit also. It has 2 balance shafts driven through an equipment directly by the crankshaft. Bottom end likewise got forged powder-metal connecting rods and new aluminum pistons with graphite-coated skirts.
The engine has an aluminum alloy cylinder head with 4 valves per cylinder. On top of the head, there are two overhead camshafts driven by a maintenance-free timing chain geared up with an automatic chain tensioner. The valvetrain has shimless, mechanical bucket tappets (no hydraulic tappets). Consumption valve lift is 9.1 mm; exhaust valve lift is 7.8 mm. The 2.5-liter engine is equipped with variable valve timing system for the consumption valves just (Mazda’s Sequential Valve Timing or S-VT system).
Like the L3-VE, the MZR 2.5 has a plastic variable length consumption manifold. The system name is the Variable Induction System or VIS. The VIS provides long ports layout for low revs and short for high engine revs. Those manipulations increase the pulsing effect of the airflow and draw more air into the cylinder for much better performance and efficiency. The L5-VE engine has actually a digitally controlled sequential, multi-point fuel injection and ignition system with individual direct ignition coils. The exhaust gases go through a stainless steel exhaust manifold/header with a heat-insulating layer and the catalytic converter.
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MZR 2.5 L 5L-VE Engine Problems and Reliability
The L5-VE engine doesn’t have common problems at all. The only thing is that the 2.5 l engine is a bit noisy, and at low rpm, there is insufficient torque to move a huge SUV or a midsize sedan (Mazda6 for instance). For a fast acceleration, you have to press the gas which adversely impacted the city gas mileage.
Mazda’s 2.5-liter engines of the L-series are very trustworthy, long lasting and problem totally free engines. With correct upkeep, you can easily get 300,000 miles on it.
you must see more engine detail in here: Engine – US Cars News or you can see on wiki here
Mazda MZR 2.5L 5L-VE Engine Specs
| Manufacturer | Mazda; Chihuahua, Mexico |
| Production years | 2008-present day |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Fuel type | Gasoline |
| Fuel system | Direct fuel injection |
| Configuration | Inline |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Valvetrain layout | DOHC |
| Bore, mm | 89.0 (3.50 in) |
| Stroke, mm | 100.0 (3.94 in) |
| Displacement, cc | 2,488 cc (151.8 cu in) |
| Type of internal combustion engine | Four-stroke, naturally aspirated |
| Compression Ratio | 9.7:1 |
| Power, hp | 170 hp (130 kW)/6,000 |
| Torque, lb ft | 167 lb-ft (226 Nm)/4,000 |
| Engine weight | ~410 lbs (190 kg) |
| Firing order | 1-3-4-2 |
| Engine oil weight | 5W-20 |
| Engine oil capacity, liter | 5.0 (5.3 us qt) |
| Oil change interval, mile | 7,500 (12,000 km) or 12 month |
| Applications | Mazda Mazda6/Atenza, Mazda Tribute, Mazda Mazda3/Axela, Mazda Mazda CX-7 |
