Engine Honda R18A

Engine Honda R18A under the hood

The 1.8-liter Honda R18A gasoline engine was produced by the concern from 2005 to 2014 and was installed on such mass models of the company as the Civic, City, FR-V or the Stream minivan. Now this power unit has already been replaced by its upgraded version under the R18Z index.

In 2006, a new R18 engine was used on the Civic 8 from Honda, which replaced the D17 engine, and on this D-series were no longer installed on Honda cars. The timing for the new engine is driven by a chain, the head has not been changed – all the same 16 valves and 1 camshaft, but the intelligent iVTEC system and dual-mode intake have already been added. The motor does not have hydraulic pushers, so the valves need to be adjusted every 40,000 km. A year later, Honda engineers, based on this engine, released a 2-liter R20A, which was installed on cars higher than the Civic class.

The R-series also includes an internal combustion engine: R20A.

The engine was installed on:

  • Honda Civic 8 (FD) in 2005 – 2012;
  • Honda City 5 (GM) in 2008 – 2014;
  • Honda FR-V 1 (BE) in 2007 – 2009;
  • Honda Stream 2 (RN6) in 2006 – 2014.


Production years 2005-2014
Displacement, cc 1799
Fuel system injector
Power output, hp 140
Torque output, Nm 175
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 81
Piston stroke, mm 87.3
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 3.7
Fuel type petrol
Euro standards EURO 4/5
Fuel consumption, L/100 km (for Honda Civic 2008)
— city
— highway
— combined
Engine lifespan, km ~280 000
Weight, kg 105

Disadvantages of the Honda R18A engine

  • The power unit is quite demanding on the quality of the fuel and oil used;
  • Bad gasoline quickly affects the condition of the catalyst or lambda probes;
  • On specialized forums, owners often complain about the very noisy operation of the adsorber valve;
  • A modest resource here is the engine mounts and the drive belt tensioner;
  • There are no hydraulic lifters and about once every 50 thousand km it is necessary to adjust the valves.

R18A Engine Repair Parts List

Engine Honda R18A

Full name of the part Part code
MOTORBEFESTIGUNG (Civic 2006-) 50890SMGE02
MOTORBEFESTIGUNG (Civic 2007-) 50890SMGE03
MOTORBEFESTIGUNG (Civic 2006-) 50880SMGE01
Intake valve guide bush (4 things per motor) 12204-PJ7-305
Exhaust valve guide bush (4 things per motor) 12205-PJ-7305
Intake valve spring (8 things) 14761RNAA01
Exhaust valve spring (8 things) 14762RNAA01
Axis of the rocker arms 14631RNAA00
Camshaft gear 14211RNAA01
Valve train chain 14401RNAA01
Head gasket 12251-RNA-A02
Valve cover gasket 71-40021-00
Camshaft bed plug Honda R18A1 25x35x17 (12513-P72-003) Eristic (12513-P72-003) OS6012
Rear crankshaft oil seal (80X98X10 (NOK)) 91214PWA003
Front crankshaft oil seal (43X58X7 (ARAI)) 91212-RNA-A01
Front crankshaft oil seal (43X58X7 (NOK)) 91212RTA003
Oil pressure sensor 37241RNAA01
Thermostat with gasket (FUJI SEIKO) 19301RNA305
Thermostat with gasket (NIPPON THERMOSTAT) 19301RNA306
Intake manifold 17100RNAA00
Basic liners Honda R16A/R18A (13321-RNA-A02/13341-RNA-A02) Taiho M457A-STD
Connecting rod bushings Honda R16A/R18A (13211-RNA-A02) Taiho R457A-STD
Semi-rings persistent (2 things) 13331-PNA-004
Complete set of Honda gaskets R18A1 Eristic EF6560
Gummi motoraufhaengung (Civic 2006) 50850SMGE01
Starter 31200RNAA01
Ignition coil (4 things) 30520RNAA01
Spark plug (4 things) 9807B561BW
Oil filter (Number replacement 15400-RBA-F01) 15400RTA003
Heater filter / Element filter 80292SMGE01
Oil nozzle (Double (2 things on the motor)) 15280RNAA00
Fuel injector (4 things) 16450RNAA01
Alternator pulley 31141RNAA01
Crankshaft pulley 13810RNAA02
Oil dipstick 15650RNAA00
Fuel tank 17044SMGE01
Gasoline filling pipe 17660SMGE01
Gasoline filling pipe 17660SMGE02
Liquid cooling tube, metal 19505RNAA00
Ventilation tube 17137RNAA00
Oil filler cap seal 15613PC6000
Timing chain damper 14530RNAA01
Filter 17048smge00
Air filter/ Element assy, air 17220RNAA00
Connecting rod (4 things) 13210RNAA00
Spark plug (4 things) 9807B561CW
Radiator drain plug 19011PH1621
Middle part of the muffler 18220SMGE01
Pin Retaining Rings (8 things) 13115RNAA00
Valve crackers (32 things) 14781PRBA02
Valve spring plate, upper (16 things) 14765RGA000
Valve spring plate, lower (16 things) 14775P08000
Radiator comp 19010RSAG01
Injector ramp 16620RNAA01
Expansion tank 19101RSAG00
V-ribbed belt 04301RNA305
V-ribbed belt 31110RSAG02
Belt tensioner pulley 31190RNA003
Piston pin (4 things) 13111RNAA00
Piston rings (4 things) 13021RNAA01
Piston rings (4 things) 13021RNAA02
Piston rings (4 things) 13011RNAA02
Piston kit (4 things) 13010RNAA00
Piston kit (4 things) 13020RNAA00
Downpipe of the exhaust system 18210SMGE01
Oil drain plug 90009PY3000
Intake manifold gasket (4 things) 17105RNAA01
Rear generator bearing 31111P08J02
Front generator bearing 31114P01014
Starter Solenoid Relay 31204RNAA01
AC generator assy 31100RNAA01
Cylinder head (“empty”) 12200RNAA00
Cylinder head (assy) 10003RNAA00
Inlet valve (8 things) 14711RNAA00
Exhaust valve (8 things) 14721P2A000
Timing valve 15810RNAA01
Valve lid (with gasket) 12310RNAA01
Crankshaft 13310RNAA00
Intake valve oil scraper cap (8 things) 12210P45G01
Exhaust valve oil scraper cap (8 things) 12211P45G01
Downpipe ring 18212SM4003
Rocker assembly (4 things) 14620RNAA01
Air filter housing 17202RSAG00
Thermostat housing 19320RNAA00
Coolant radiator cap 19045RAA003
Expansion tank cap 19102RNAA00
Lower lambda probe 36532RNAA01
Oil receiver 15220RNAA01
Oil pump 15100RNAA02
Oil pan 11200RSAG01
Flywheel 22100RSAL01
Upper gasket set 06110RNA000
Lower gasket set 06114RNA010
Coolant pump 19200RNAA01
Fuel pump 17045SMGE01
Timing chain tensioner 14510RNAA01
Neutralizer 18160RSAG00
Flywheel bushing 22103RNA004
Motorbefestigung 50880SMGE02
Knock sensor 30530RNAA01
Catalyst sensor first (upper) 36531RNAA01
Mass air flow sensor 37980RNAA01
Throttle position sensor 36162RNAA01
Camshaft position sensor 37510RNAA01
Coolant temperature sensor 37870PLC004
Fuel level sensor 17047SMGE01
Throttle valve 16400RNBA01
Rear muffler 18307SMGE01
Rear Right Muffler 18330SMGE02
Fuel filler plug 17670SJA013
Chain sprocket 13620RNAA01
Sensor 37310RSAG01
Short-block (without cylinder head) 10002RSAG00
Tank for gasoline vapors (Number replacement 17300-SNA-013,17300-SNA-023) 17300SNA003
Timing chain tensioner shoe 14520RNAA01
Starter Bendix 31207PCA003
Cylinder block “empty” 11000RNAA00
Valve cover bolt (6 things) 90011RNAA00
Valve cover bolt (2 things) 90011RSAG00
Flywheel bolt (Transmission 6MT) 90011PNAB00
Connecting rod bolt (8 things) 13204RNAA01
Crankshaft pulley bolt 90017PCX013
Cylinder head bolts (10 things) 90005RNAA01
Camshaft 14110RNAA00
Upper main bearing (5 things) 13321RNAA01
Upper main bearing (5 things) 13322RNAA01
Upper main bearing (5 things) 13323RNAA01
Upper main bearing (5 things) 13324RNAA01
Upper main bearing (5 things) 13325RNAA01
Upper main bearing (5 things) 13326RNAA01
Lower main bearing (5 things) 13341RNAA01
Lower main bearing (5 things) 13342RNAA01
Lower main bearing (5 things) 13343RNAA01
Lower main bearing (5 things) 13344RNAA01
Lower main bearing (5 things) 13345RNAA01
Lower main bearing (5 things) 13346RNAA01
Connecting rod bearing (8 things) 13215RNAA01
Connecting rod bearing (8 things) 13211RNAA01
Connecting rod bearing (8 things) 13212RNAA01
Connecting rod bearing (8 things) 13213RNAA01
Connecting rod bearing (8 things) 13214RNAA01
Connecting rod bearing (8 things) 13216RNAA01

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