Honda Accord Problems

The Honda K series engine is a four-cylinder four-stroke engine. The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system eliminates the need for spark plug wires and distributor as well as the problems associated with them. It also allows the ECU to precisely control the ignition timing based on various sensor inputs. The cylinders have cast iron sleeves similar to the B-series engines, as opposed to the FRM cylinders found in the H-series.

Two versions of Honda's i-VTEC system can be found on K series engines; variable timing control (VTC) can be found on the intake cam of both versions. The VTEC system on engines like the K20A3 only operate on the intake cam; at low RPM only one intake valve is fully opened, the other opening just slightly to create a swirl effect in the combustion chamber for improved fuel atomization. At high RPM, both intake valves open fully to improve engine breathing. In engines such as the K20A2 found in the Acura RSX Type-S, the VTEC system operates on both the intake and exhaust valves, allowing both to benefit from multiple cam profiles.

K Series

K20

K20A

The 1,998 cc (1.998 L; 121.9 cu in) K20 engines have 86 mm (3.4 in) bore and 86 mm (3.4 in) stroke. The 2,157 cc (2.157 L; 131.6 cu in) version has 87.0 mm (3.43 in) bore & 90.7 mm (3.57 in) stroke.

Applications:

• 2,157 cc (2.157 L; 131.6 cu in), 260 PS (190 kW; 260 hp) @8250, 237 N·m (175 lb·ft) @6750:
  • Honda Civic Mugen RR Advanced Concept
• 1,998 cc (1.998 L; 121.9 cu in), 240 PS (180 kW; 240 hp) @8400, 216 N·m (159 lb·ft) @7000:
  • Honda Civic Mugen(Honda ABA-FD2)
• 1,998 cc (1.998 L; 121.9 cu in), 225 PS (165 kW; 222 hp) @8000, 215 N·m (159 lb·ft) @6100:
  • 2007- JDM Honda Civic Type-R (FD2)
• 1,998 cc (1.998 L; 121.9 cu in), 215 PS (158 kW; 212 hp) @8000, 202 N·m (149 lb·ft) @7000:
  • 2001-2006 JDM Honda Civic Type-R (EP3)
• 1,998 cc (1.998 L; 121.9 cu in), 220 PS (160 kW; 220 hp) @8000, 206 N·m (152 lb·ft) @7000:
  • 2001-2007 JDM Honda Integra Type-R (DC5)
• 1,998 cc (1.998 L; 121.9 cu in), 160 PS (120 kW; 160 hp) @6500, 191 N·m (141 lb·ft) @4000:
  • 2001-2007 Honda Integra Type-S (DC5)
• 1,998 cc (1.998 L; 121.9 cu in), 220 PS (160 kW; 220 hp) @8000, 206 N·m (152 lb·ft) @6000:
  • 2003-2007 JDM Honda Accord Euro-R CL7

K20A2

• Found in:
  • 2002-2004 Acura RSX Type-S and 2002-2005 Honda Civic Type R (EP3, European)
    • Displacement: 1,998 cc (121.9 cu in)
    • Compression: 11.0:1
    • Power: 201ps @ 7400 rpm
    • Torque: 142 ft·lbf (196N·m) @ 5600 rpm
    • Redline: 7900 rpm
    • Rev limit: 8100 rpm (RSX-S, Civic-R unknown)
    • i-VTEC engagement: 5800 rpm

K20A3

• Found In
  • 2002-2005 Honda Civic Si (EP3)
  • 2002-2005 Honda Civic SiR (EP3)(Canadian version of US Civic Si)
  • 2002-2006 Acura RSX
    • Displacement: 1,998 cc (121.9 cu in)
    • Compression: 9.8:1
    • Power: 160hp(120 kW) @ 6500 rpm(SAE net J1349 Rev 8/04)
    • Torque: 142 lb·ft (193 N·m)* (191 N·m) @ 4000 rpm(SAE net J1349 Rev 8/04)
    • Redline: 6800 rpm

K20A4

• Found in:
  • 2003-2005 Honda Accord (UC1)
  • 2006-2008 Honda Accord (UC3)
  • 2001-2007 Honda CR-V (RD5)
  • 2000-2003 Honda Stream (RN1)
  • 2004-2007 Honda Stream (RN3)

K20A6

• Found in:
  • 2003-2005 Honda Accord (European)
    • Displacement: 1,998 cc (121.9 cu in)
    • Compression 9.8:1
    • Bore / Stroke 86 mm x 86 mm
    • 190nm Torqe @ 4500rpm
    • 160hp @ 6000rpm

Similar to the K20A3.

K20Z1

• Found in:
  • 2005-06 Acura RSX Type-S
• Displacement: 1,998 cc (121.9 cu in)
  • • Compression: 11:0:1
    • Power: 201 hp (154 kW) @ 7800 rpm (SAE net J1349 Rev 8/04)
    • Torque: 143 ft·lb (194 Nm) @ 7000 rpm (SAE net J1349 Rev 8/04)
    • Redline: 8300 rpm
    • i-VTEC Engagement Window:5800 rpm

K20Z2

• Found in:
  • 2006- Acura CSX (Canada)
    • Displacement: 1,998 cc (121.9 cu in)
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm (SAE net J1349 Rev 8/04)
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm / 188 N·m @ 4200 rpm (Singapore)
    • Redline: 6800 rpm
  • 2006- Honda Civic (JDM)
    • Displacement: 1,998 cc (121.9 cu in)
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm
    • Redline: 6800 rpm
  • 2006- Honda Accord(Europe)
    • Displacement: 1998 cc
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm
    • Redline: 6800 rpm

K20Z4

This inline-4 cylinder internal combustion engine is found in the redesigned Honda Civic Type-R (FN2). It has an aluminium block with an aluminium head, and a bore and stroke of 86 mm x 86 mm, resulting in a 1,998 cc (121.9 cu in) displacement.

• Found in:
  • 2007 Honda Civic Type-R (FN2) (Europe Market)
    • Displacement : 1,998 cc (121.9 cu in)
    • Compression : 11.7:1
    • Power: 201 hp (148 kW) @ 7800 rpm
    • Torque: 142 ft·lbf (193 N·m) @ 5600 rpm
    • Redline: 8200 rpm
    • i-VTEC Engagement: 5,400 rpm

K23

K23A1

• Turbocharged
• Found in:
  • 2007/2008 Acura RDX
    • Displacement: 2,300 cc (140.4 cu in)
    • Compression: 8.8:1
    • Power: 240 hp (179 kW) @ 6000 rpm (SAE net)
    • Torque: 260 lb·ft (353 N·m) @ 4500 rpm (SAE net)
    • Redline: 6800 rpm
    • Bore: 86 mm
    • Stroke: 99 mm

K24

K24A1

• Found in:
  • 2002-2006 Honda CR-V
    • Displacement: 2,354 cc (143.6 cu in)
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 9.6:1
    • Power: 160 hp (120 kW) @ 6000 rpm
    • Torque: 162 ft·lbf (220 N·m) @ 5200 rpm
    • Redline: 6500 rpm

K24A2

• Found in:
  • 2004-2008 Acura TSX, JDM CL9 Accord Type-S, RB1 Odyssey Absolute
    • Displacement: 2,354 cc (143.6 cu in)
    • Power: 200 PS (150 kW; 200 hp) @ 6800 rpm
    • Torque: 232 N·m (171 lb·ft) @ 4500 rpm
    • Bore: 87 mm
    • Stroke: 99 mm
    • Redline:
      • Automatic 7100 rpm
      • Sequential Sportshift 7300 rpm (7100 rpm U.S.)
      • Manual 7600 rpm (7100 rpm U.S.)
        • Note: The 2006-2008 K24A2 in the U.S. market Acura TSX has the following improvements

Increased intake flow:

                        * Intake valve + 1 mm oversize * Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration * Throttle body increased from 60-64mm * Radius on some intake pipes increased from 70-80mm
                      

Increased exhaust flow

                        * Exhaust Head pipe increased frm 60-65mm * Higher flow catalytic converter * Main (single) exhaust pipe increased from 54-57mm * Rear (twin) pipes increased in diameter from 42.5 to 45mm
                      

Block improvements:

                        * Additional air passages in crankcase for reduced pumping losses
                      

Other

                        * Stronger conrods * New crankshaft with more counterbalance weight * Revised pistons with more valve-piston clearance
                      

K24A3

• Found in:
  • 2003-2007 Honda Accord (Europe(EDM)) and Japan(JDM)) and 2003-2007 Honda Accord Euro CL9 (Australia)

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