Ford Duratec HE 2.0 / Mazda LF

The Ford Duratec HE 2.0 / Mazda LF is a 2.0 l (1,999 cc, 120.0 cu.in.) straight-four 4-stroke natural aspirated gasoline engine from Ford Duratec-family and from Mazda MZR-series.

The Duratec HE 2.0 / LF features a lightweight aluminum block with a five-bearings crankshaft, aluminum head with two camshafts (DOHC), and four valves per cylinder. This engine used a gasoline direct injection (GDI) fuel system. The compression ratio ratings are 10.0:1, 10.8:1, or 12.0:1 depending on the modification. Cylinder bore and piston stroke are 87.5 mm (3.44 in) and 83.1 mm (3.27 in), respectively.

This engine produces from 132.0 PS (97.0 kW; 130.0 HP) at 6,000 rpm to 145.0 PS (110 kW; 147.5 HP) at 6,500 rpm of horsepower and from 175 N·m (17.8 kg·m, 129 ft·lb) at 4,000 rpm to 185 N·m (18.9 kg·m, 136.3 ft·lb) at 4,500 rpm of peak torque, depending on engine modification.

Engine codes:

• Ford: AODA, AODB, AOBC, AODE, AOWA, AOWB, SYDA, CJBA, CJBB, TBBA
• Mazda: LF-17, LF-18, LF-F7, LF-DE, LF-62, LF-VE, LF-VD
• Volvo: B4204S3? or B4204S4 for Flexifuel engine version

General information

Cylinder block

The Duratec HE 2.0 / Mazda LF has an aluminum cylinder block with cast-iron cylinder liners and five bearing support system. It has an 87.5 mm (3.44 in) cylinder bore and 83.1 mm (3.27 in) piston stroke. The engine has a crankshaft with eight balance weights. The engine is equipped with steel connecting rods, float-type piston pins, aluminum alloy pistons with two compression, and a single oil control ring.

Main bearing cap bolts tightening procedure and torque specs:

ELASTIC REGION TIGHTENING BOLT (BOLT STEM LENGTH 104 mm)

• Step 1: 3-7 Nm; 30.6-71.3 kg·cm; 26.6—61.9 in·lb
• Step 2: 23-27 Nm; 2.4-2.7 kg·m; 17—19.9 ft·lb
• Step 3: 38—42 Nm; 3.9-4.2 kg·m; 28.1—30.9 ft·lb
• Step 4: Loosen all the bolts
• Step 5: 3-7 Nm; 30.6-71.3 kg·cm; 26.6—61.9 in·lb
• Step 6: 18-22 Nm; 1.9-2.2 kg·m; 13.3—16.2 ft·lb
• Step 7: Turn all bolts 90°

PLASTIC REGION TIGHTENING BOLT (BOLT STEM LENGTH 110 mm)

• Step 1: 44-46 Nm; 4.5-4.6 kg·cm; 32.5—33.9 in·lb
• Step 2: Turn all bolts 175°-185°

After securing bearing cap bolts, make sure the crankshaft turns smoothly by hand.

Connecting rod bearing bolts

• Step 1: 26-32 Nm; 2.7-3.2 kg·m; 19.2—23.6 ft·lb
• Step 2: Turn all bolts 80°-100°

Cylinder head

Head tightening procedure and torque specs:

• Step 1: 3-11 Nm; 30.6-112 kg·cm; 26.6—97.3 in·lb
• Step 2: 13-17 Nm; 1.4-1.7 kg·m; 9.6—12.5 ft·lb
• Step 3: 43-47 Nm; 4.4-4.7 kg·m; 31.8—34.6 ft·lb
• Step 4: Turn all bolts 90°
• Step 5: Turn all bolts another 90°

Camshaft bearing caps

• Step 1: 5-9 Nm; 50.1-91.7 kg·cm; 44.3—79.5 in·lb
• Step 2: 14-17 Nm; 1.4-1.7 kg·m; 10.4—12.5 ft·lb

Maintenance data

Vehicle applications

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.