Mazda 2.0L LF-DE/LF-VE Engine Specs, Problems, and Reliability. The Mazda LF-DE is a 2.0-liter inline 4-cylinder gasoline engine. It belongs to the Mazda’s L-series. It was first presented in 2003 design year of the Mazda3. This engine likewise has various later versions – LF-VE and LF-VD.
The LF-DE has a state-of-the-art aluminum alloy cylinder block with cast iron sleeves. The engine shares the 83.1 mm (3.27 in) stroke of the 1.8 L engine (L8-DE, L8-VE), but the bore is bigger – 87.5 mm (3.44 in). Unlike the 2.5-liter variation L5-VE, the 2.0 L engine does not have balancer shafts. The LF has an iron crankshaft with 4 counterweights and a torsional damper. In 2009, the iron crankshaft was replaced with a created steel crankshaft. There are forged linking rods with fraction-split ends, aluminum alloy pistons with graphite-coated skirts for friction decrease. The pistons are put with the offset by 0.8 mm.
The 16-valve cylinder head with double overhead camshafts is made from aluminum-silicon alloy. The camshafts are driven by a link grounding type chain instantly tensioned using the engine oil pressure and the spring (the timing chain is maintenance-free). The head has the 39 degrees angle between the intake and the exhaust valves. There are solid bucket tappets, and the valve gaps need change occasionally. The LF-DE intake valve lift is 8.8 mm; while for the LF-VE, the intake valve lift was increased up to 9.1 mm. They both have the exhaust valve lift of 7.7 mm.
The LF-VE engine was geared up with the S-VT system (Consecutive Valve Timing) and a variable length intake manifold. The LF-DE and LF-VE engines have consecutive, multi-point electronic injection system, while the LF-VD variation has DISI direct fuel injection system. All versions were equipped with the electronic ignition system and specific ignition coils for each cylinder. The LF engines come with stainless-steel exhaust manifolds/headers and the catalytic converters.
As was reference before, in 2009 the LF-VE engine for the Mazda MX-5 got some updates. It got brand-new pistons, forged crankshaft, valve springs and connecting-rod bearings. The maximum power now produced at 7,000 rpm and redline is at 7,500 rpm.
2.0 L LF-DE/ LF-VE Engine Problems and Reliability
The LF 2.0 L engine isn’t rather as smooth as the 2.3-liter version. There is a power distinction likewise, however it’s not substantial. The common issue is high oil consumption after 100,000 miles on it. The weak point is valve stem seals. Bad connecting rod bearings likewise trigger oil intake. The engine has problems with thermostat often at 60,000 miles. The engine does not warm up or on the contrary, overheats due to a stuck thermostat.
Cars with the LF-VE had some issues with acceleration and Examine Engine indication. That problem is a variable consumption manifold which doesn’t run appropriately and even doesn’t operate at all. The special valves inside do not open the second course after 3,000 rpm.
Overall, the engine is quite reputable and long lasting. The maker says the engine life is more than 200,000 miles, and real-life operation authorized that.
you must see more engine detail in here: Engine – US Cars News or you can see on wiki here
Mazda 2.0L LF-DE/LF-VE Engine Specs
|Cylinder block material||Aluminum|
|Cylinder head material||Aluminum|
|Fuel system||fuel injection|
|Number of cylinders||4|
|Valves per cylinder||4|
|Bore, mm||87.5 mm (3.44 in)|
|Stroke, mm||83.1 mm (3.27 in)|
|Displacement, cc||1,999 cc (122.0 cu in)|
|Type of internal combustion engine||Four-stroke, naturally aspirated|
10.8:1 – Mazda MX-5
|Power, hp||136-148 hp (101-110 kW)/6,000-6,500|
|Torque, lb ft||129-138 lb-ft (175-187 Nm)/4,000-4,500|
|Engine weight||392 lbs (178 kg)|
|Engine oil weight||5W-20, 5W-30|
|Engine oil capacity, liter||4.3 (0.4 – oil filter)|
|Oil change interval, mile||12,000 (20,000 km)/12 months|
|Applications||Mazda Axela/Mazda3, Mazda6 for Europe, Mazda Premacy/Mazda5, Mazda MX-5, Volvo C30, Volvo S40, Volvo V50, Volvo V70, Volvo S80|