Suzuki J20

Suzuki J20The Suzuki J20 is a 2.0 L (1,995 cc, 121.74) straight-four 4-stroke natural aspirated gasoline engine from the Suzuki J-family. The J20 engine was manufactured by Suzuki Motor Corporation.

The J20 engine features an aluminum cylinder block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). It has an 84.0 mm (3.31 in) cylinder bore and 90.0 mm (3.54 in) piston stroke. Compression ratio rating is 9.7:1.

The Suzuki J20 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 individual ignition coil for each spark plug.

The J20 engine produced 130 PS (95 kW; 127 HP) at 6,000 rpm of maximum horsepower and 182 N·m (18.6 kg·m, 134 ft·lb) at 3,000 rpm of maximum torque.

The breakdown of the engine code is as follows:

  • J – Engine family
  • 20 – 2.0 Liter Displacement

General information

Engine Specifications
Engine codeJ20
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Displacement2.0 L, 1,995 cm3 (121.7 cu in)
Fuel systemMulti-point fuel injection (MPFI)
Power adderNone
Power output130 PS (95 kW; 127 HP) at 6,000 rpm
Torque output182 N·m (18.6 kg·m, 134 ft·lb) at 3,000 rpm
Firing order1-3-4-2
Dimensions (L x W x H):

Cylinder block

The Suzuki J20 has an aluminum cylinder block with five bearing support system. It has an 84.0 mm (3.31 in) cylinder bore and 90.0 mm (3.54 in) piston stroke. The engine has two compression and single oil control ring. Compression ratio rating is 9.7:1.

Cylinder block (Suzuki Grang Vitara specs)
Cylinder block alloyAluminum
Compression ratio:9.7:1
Cylinder bore:84.0 mm (3.31 in)
Piston stroke:90.0 mm (3.54 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Cylinder inner diameter (standard):84.000-84.010 mm (3.3071-3.3075 in)
Piston skirt diameter (standard):83.970-83.980 mm (3.3059-3.3063 in)
Piston pin outer diameter:20.997-21.000 mm (0.8267-0.8268 in)
Piston ring side clearance:Top0.030-0.070 mm (0.0012-0.0028 in)
Second0.020-0.060 mm (0.0008-0.0024 in)
Oil0.060-0.150 mm (0.0024-0.0059 in)
Piston ring end gap:Top0.200-0.330 mm (0.0079-0.013 in)
Second0.330-0.480 mm (0.013-0.0189 in)
Oil0.200-0.500 mm (0.0079-0.0197 in)
Crankshaft journal diameter:58.000 mm (2.2835 in)
Crankpin diameter:52.000 mm (2.0472 in)

Crankcase bolts tightening procedure and torque specs:
10 mm

  • Step 1: 40 Nm; 4.0 kg·m; 29.0 ft·lb
  • Step 2: 0 Nm; 0 kg·m; 0 ft·lb
  • Step 3: 40 Nm; 4.0 kg·m; 29.0 ft·lb
  • Step 4: 58 Nm; 4.8 kg·m; 42.0 ft·lb

8 mm

  • Step 1: 26 Nm; 2.6 kg·m; 19.0 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 double overhead camshaft is mounted over the cylinder head; it is driven from the crankshaft through timing chains, and no pushrods are provided in the valve train system. The J20 engine used Variable Valve Timing System (VVT) on the intake camshaft. Intake valves are 33.0 mm (1.2992 in) in diameter, and the exhaust valves are 28.0 mm (1.1024 in). This engine did not have hydraulic lifters, so special valve shims are used to adjust the valve clearance.

Cylinder head
Valve Arrangement:DOHC, chain drive
Valves:16 (4 valves per cylinder)
Valve head diameter:INTAKE33.0 mm (1.2992 in)
EXHAUST28.0 mm (1.1024 in)
Valve length:INTAKE86.20 mm (3.3937 in)
EXHAUST86.00 mm (3.3858 in)
Valve stem diameter:INTAKE5.965-5.980 mm (0.2348-0.2354 in)
EXHAUST5.940-5.955 mm (0.2339-0.2344 in)
Valve spring free length:51.13 mm (2.013 in)
Camshaft cam height:INTAKE45.669-45.829 mm (1.798-1.8043 in)
EXHAUST45.550-45.710 mm (1.7933-1.7996 in)
Camshaft journal diameter:25.959-25.980 mm (1.022-1.0228 in)

Head tightening procedure and torque specs:
For M6 bolts:

  • Step 1: 11 Nm (1.1 kg·m, 8.0 ft·lb)

For M10 bolts:

  • Step 1: 52 Nm; 5.2 kg·m; 38.0 ft·lb
  • Step 2: 82 Nm; 8.2 kg·m; 59.2 ft·lb
  • Step 3: 0 Nm; 0 kg·m; 0 ft·lb
  • Step 4: 52 Nm; 5.2 kg·m; 38.0 ft·lb
  • Step 5: 103 Nm; 10.3 kg·m; 74.5 ft·lb

Maintenance data

Valve clearance (Cold)
Intake valve0.18-0.22 mm (0.0071-0.0087 in)
Exhaust valve0.28-0.32 mm (0.011-0.0126 in)
Valve clearance (Hot)
Intake valve0.21-0.27 mm (0.0083-0.0106 in)
Exhaust valve0.30-0.36 mm (0.0118-0.0142 in)
Compression pressure
Standard14.0 kg/cm2 / 200 rpm
Minimun11.0 kg/cm2 / 200 rpm
Compression differential limit between cylinders1.0 kg/cm2 / 200 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil5W-30, 10W-30
Oil type APISG, SH, SJ, SL or SM
Engine oil capacity (Refill capacity)~ 5.5 L (5.81 US. qt, 4.84 Imp. qt.)
Oil change interval, km (miles)5,000-10,000 (3,000-6,000)
Ignition system
Spark plugNGK: BKR6E-11 (Nickel), IFR5J11 (Iridium); DENSO: K20PR-U11 (Nickel)
Spark plug gap1.0-1.1 mm (0.0394-0.0433 in)
Spark plug tightening torque25 N·m (2.5 kg·m, 18.4 ft·lb)

Vehicle applications

ModelYears Produced
Chevrolet Tracker1999–2002
Suzuki Escudo1999–2002
Suzuki Vitara / Grand Vitara1999–2002
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.

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  1. I want to buy engine for Suzuki grand vitara four cylinder with contolbox j20a.what is the price.

  2. The engine pictured above is a J20a in an SQ420 chassis, it does not have VVT, and as far as I know, neither the J20a or J20b was ever built with VVT

    • Hello Mark, I own a 209 chevy tracker and I just took the muffler off… To me it sounded like the cams were either sucks in a higher rpm vvt position, or it doesn’t have vvt. Can you tell me more?

  3. I have a 2008 Suzuki sx4 with solid lifters but can’t find shims. Do you know who has them or can I just switch to hydraulic ones?

  4. Looking for ignition coils for J20A and need advice what make suits best!
    Note that I altered the compression slightly if this has to do anything with the coils

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