Suzuki M16A

The Suzuki M16A is a 1.6 L (1,586 cc, 96.8 cu·in) straight-four 4-stroke natural aspirated gasoline engine from the Suzuki M-family. The M16A engine was manufactured by Suzuki Motor Corporation.

The Suzuki M16A engine features an aluminum cylinder block with wet liners and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). A 78.0 mm (3.07 in) cylinder bore and 83.0 mm (3.27 in) piston stroke give the M16A engine a total of 1,586 cc (96.8 cu·in) of displacement. Compression ratio rating is 10.5:1 or 11.1:1.

The M16A engine is equipped with Multi-point fuel injection (MPFI), VVT (Variable Valve Timing) system on the intake side, ETCS (Electronic Throttle Control System) and electronic ignition system with one ignition coil for two spark plugs.

This engine produced from 106 PS (78 kW; 105 HP) at 5,900 rpm to 136 PS (100 kW; 134 HP) at 6,900 rpm of maximum horsepower and from 145 N·m (14.8 kg·m, 106.9 ft·lb) at 4,100 rpm to 160 N·m (16.3 kg·m, 117.9 ft·lb) at 4,400 rpm of peak torque.

The breakdown of the engine code is as follows:

• M – Engine family
• 16 – 1.6 Liter Displacement

General information

Cylinder block

The Suzuki M16A has an aluminum cylinder block with five bearing support system and wet liners. It has a 78.0 mm (3.07 in) cylinder bore and 83.0 mm (3.27 in) piston stroke. The engine has two compression and single oil control ring. Compression ratio rating is 10.5:1 or 11.1:1.

Main bearing cap bolts tightening procedure and torque specs:
No.1 bolt (1-10)

• Step 1: 30 Nm; 3.0 kg·m; 22.0 ft·lb
• Step 2: 50 Nm; 5.0 kg·m; 36.5 ft·lb
• Step 3: Turn all bolts 60°

No.2 bolt (11-20)

• Step 1: 25 Nm; 2.5 kg·m; 18.0 ft·lb

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

Connecting rod bearing bolts

• Step 1: 15 Nm; 1.5 kg·m; 11 ft·lb
• Step 2: Turn bolts 45°
• Step 3: Turn bolts another 45°

Cylinder head

The cylinder head is made of aluminum alloy which gives it good cooling efficiency. The engine has dual overhead camshaft design with four valves per cylinder. The M16A engine used Variable Valve Timing system (VVT) on the intake camshaft. Intake valves are 37.0 mm (1.4567 in) in diameter, and the exhaust valves are 25.0 mm (0.9843 in). This engine did not have hydraulic lifters, so special valve shims are used to adjust the valve clearance.

Head tightening procedure and torque specs:
For M8 bolts:

• Step 1: 25 Nm (2.5 kg·m, 18.4 ft·lb)

For M10 bolts:

• Step 1: 20 Nm; 2.0 kg·m; 14.5 ft·lb
• Step 1: 40 Nm; 4.0 kg·m; 29.0 ft·lb
• Step 2: Turn all bolts 60°
• Step 3: Turn all bolts another 60°

Maintenance data

Vehicle applications

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