The 2.0-liter Honda R20A gasoline engine has been assembled by the Japanese concern since 2006 and is installed on a number of popular models of the company, such as the Civic, Accord or the CR-V crossover. This unit is available in several modifications, which differ little from each other.
This two-liter unit is nothing more than an oversized R18A. The increase in volume from 1.8 liters to 2.0 was achieved thanks to a long-stroke crankshaft. The changes also affected the intake manifold, balancing shafts were installed on the motor. The cylinder head remained with one camshaft, sixteen valves and the iVTEC system. Motor without hydraulic lifters. From the previous version with the K20 index, the motor differs in a more urban character, improved traction at low and medium speeds. The engine has become more economical, reliable and simpler.
The R-series also includes an internal combustion engine: R18A.
The engine was installed on:
- Acura ILX 1 (DE1) in 2012 – 2015;
- Honda Accord 8 (CU) in 2008 – 2015;
- Honda Civic 9 (FB) in 2012 – 2015;
- Honda CR-V 3 (RE) in 2006 – 2012; CR-V 4 (RM) in 2011 – 2018; CR-V 5 (RW) in 2017 – 2021;
- Honda Stepwgn 4 (RK) in 2009 – 2015;
- Honda Stream 2 (RN6) in 2006 – 2014;
- Proton Perdana (CP3) in 2013 – 2020.
Specifications
| Production years | since 2006 |
| Displacement, cc | 1997 |
| Fuel system | injector |
| Power output, hp | 150 – 155 |
| Torque output, Nm | 185 – 195 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 96.9 |
| Compression ratio | 10.5 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | i-VTEC |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Honda Accord 2009) — city — highway — combined |
9.4 5.9 7.2 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 110 |
Disadvantages of the Honda R20A engine
- This engine is quite demanding on the quality of fuel and oil used;
- From bad gasoline, the catalyst quickly collapses and the lambda probes burn out;
- Many Honda owners are annoyed by strong knocks from the operation of the adsorber valve;
- Relatively small resource have engine mounts and drive belt tensioner;
- Since there are no hydraulic lifters, valve clearances need to be adjusted periodically.
R20A Engine Repair Parts List
| Full name of the part | Part code |
| Crankshaft | 13310RZP000 |
| Flywheel | 22100RZP005 |
| Torque converter | 26000RWK305 |
| Connecting rod | 13210RZP000 |
| Intake valve guide bush | 12204-PJ7-305 |
| Exhaust valve guide bush | 12205-PJ-7305 |
| Intake valve spring | 14761RNAA01 |
| Exhaust valve spring | 14762RNAA01 |
| Valve cracker | 14781RGMA01 |
| Hydraulic compensator | 14820RNAA01 |
| Axis of the rocker arms | 14631RNAA00 |
| Camshaft gear | 14211RNAA01 |
| Valve train chain | 14401RNAA01 |
| Head gasket | 12251-RNA-A02 |
| Valve cover gasket | 71-40021-00 |
| Converter gasket | 18115RNA004 |
| Exhaust pipe gasket | 18229-S6D-003 |
| Rear crankshaft oil seal | 91214PWA003 |
| Front crankshaft oil seal | 91212-RNA-A01 |
| Front crankshaft oil seal | 91212RTA003 |
| Camshaft bed plug Honda R18A1 25x35x17 (12513-P72-003) Eristic | OS6012 |
| Oil pressure sensor | 37241RNAA01 |
| Oil level gauge | 37310RSAG02 |
| Expansion tank | 19101RZAA00 |
| Thermostat with gasket | 19301RNA305 |
| Thermostat with gasket | 19301RNA306 |
| Fuel level sensor | 17047SWWE00 |
| Intake manifold | 17100RNAA00 |
| Upper main bearing | 13321RZP003 |
| Upper main bearing | 13322RZP003 |
| Upper main bearing | 13323RZP003 |
| Upper main bearing | 13324RZP003 |
| Upper main bearing | 13325RZP003 |
| Upper main bearing | 13326RZP003 |
| Lower main bearing | 13341RZP003 |
| Lower main bearing | 13342RZP003 |
| Lower main bearing | 13343RZP003 |
| Lower main bearing | 13344RZP003 |
| Lower main bearing | 13345RZP003 |
| Lower main bearing | 13346RZP003 |
| Connecting rod bearing | 13211RNEA01 |
| Connecting rod bearing | 13212RNEA01 |
| Connecting rod bearing | 13213RNEA01 |
| Connecting rod bearing | 13214RNEA01 |
| Connecting rod bearing | 13215RNEA01 |
| Connecting rod bearing | 13216RNEA01 |
| Semi-rings persistent | 13331-PNA-004 |
| Gummi motoraufhaengung | 50850SWCE02 |
| SUMMI,GETRIEBEAUFHAENGUNG | 50850SWAA81 |
| Assembled generator | 31100RZPG01 |
| Starter | 31200RNAA01 |
| Ignition coil | 30520RNAA01 |
| Spark plug | 9807B561BW |
| Air filter | 17220RZPG00 |
| Oil filter | 15400RTA003 |
| Fuel filter assembled | 17048SWWE00 |
| Cabin filter | 80292SWWG01 |
| V-ribbed belt | 31110RWK004 |
| Belt tensioner pulley | 31190RNA003 |
| Thermostat gasket | 19305PLCA00 |
| Radiator drain plug | 19011PH1621 |
| Middle part of the muffler | 18220SWWE01 |
| Fuel tank | 17044SWWE00 |
| Assembled fuel pump | 17045SWWE00 |
| Crankcase ventilation pipe | 17137RZPG00 |
| Liquid cooling tube, metal | 19505RNAA00 |
| Oil filler cap seal | 15613PC6000 |
| Timing chain damper | 14530RNAA01 |
| Piston pin | 13111RNAA00 |
| Piston rings | 13021RZP003 |
| Piston rings | 13021RZP004 |
| Piston rings | 13011-RZP-004 |
| Piston kit | 13020RNAY00 |
| Piston kit | 13010RNAY00 |
| Downpipe of the exhaust system | 18210SWWE01 |
| Oil drain plug | 90009PY3000 |
| Coolant drain plug (from the cylinder block) | 90001PM3003 |
| Intake manifold gasket | 17105RNAA01 |
| Coolant pump gasket | 19222RNAA00 |
| Rear generator bearing | 31111PT0003 |
| Front generator bearing | 31114PGKA01 |
| Coolant radiator | 19010RZPG51 |
| Injector ramp | 16620RNAA01 |
| Oil nozzle | 15280RZP000 |
| Fuel injector | 16450RZP003 |
| Pin Retaining Rings | 13115RNAA00 |
| Valve spring plate, upper | 14765RGA000 |
| Valve spring plate, lower | 14775P08000 |
| Crankshaft gear | 13620RZP003 |
| Alternator pulley | 31141RZPG01 |
| Crankshaft pulley | 13810-RZP-003 |
| Engine coolant radiator hose, upper | 19501RZPG01 |
| Lower engine coolant hose | 19502RZPG01 |
| Oil dipstick | 15650RZP000 |
| Inlet valve | 14711RNAA00 |
| Exhaust valve | 14721P2A000 |
| Valve lid | 12310RNAA01 |
| Upper gasket set | 06110-RZP-000 |
| Lower gasket set | 06114RNAZ00 |
| Coolant pump | 19200RZP013 |
| Drive belt tensioner | 31170RZPG01 |
| Timing chain tensioner | 14510RNAA01 |
| Neutralizer | 18160RZPG01 |
| Intake valve oil scraper cap | 12210PZ1004 |
| Exhaust valve oil scraper cap | 12211PZ1004 |
| Rocker assembly | 14620RNAA01 |
| Air filter housing | 17201-RZP-G00 |
| Thermostat housing | 19320RNAA00 |
| Coolant radiator cap | 19045RAA003 |
| Expansion tank cap | 19102RNAA00 |
| Lower lambda probe | 36532RNAA01 |
| Oil pump | 15100RZP003 |
| Oil pan | 11200RZVE02 |
| Cylinder head (“empty”) | 12200RNAA00 |
| Cylinder head (assy) | 10003RZP000 |
| Starter Solenoid Relay | 31204RNA003 |
| Rocker nut | 90206PM3004 |
| Throttle valve | 16400RZVG01 |
| Rear muffler | 18307SWWE01 |
| Fuel filler neck | 17660SWAQ01 |
| Fuel filler plug | 17670SJA013 |
| Knock sensor | 30530RNAA01 |
| Mass air flow sensor | 37980RNAA01 |
| Crankshaft position sensor | 37500RAAA01 |
| Camshaft position sensor | 37510RNAA01 |
| Coolant temperature sensor | 37870PLC004 |
| Tank for gasoline vapors | 17300SNA003 |
| Timing chain tensioner shoe | 14520RNAA01 |
| Starter Bendix | 31207PCA003 |
| Cylinder block “empty” | 11000RZP000 |
| Torque converter bolt | 957010601408 |
| Flywheel bolt | 90011PNAB00 |
| Adjusting bolt | 14744PM3000 |
| Connecting rod bolt | 13204RNAA01 |
| Crankshaft pulley bolt | 90017PCX013 |
| Cylinder head bolts | 90005RNAA01 |
| Camshaft | 14110RZP000 |
| Balance Shaft Liner | 13435RZP004 |
| LAMBDASONDE | 36531RNA003 |
| Motorbefestigung | 50880SWAA01 |
| Motorbefestigung | 50880SWCE81 |
| Motorbefestigung | 50890SWAA02 |
| Motorbefestigung | 50890SWAA81 |
| Sensor | 37870RZA007 |
| Short-block | 10002RZVE00 |
