Honda R18A1 1.8L L4 Remanufactured Engine 2006-2011
Turn heads quickly using the custom LS Classic GMLS9006 495HP crate engine package right now. We pair a 376 CID aluminum block with cast BBC valve covers and Holley EFI.
- 495 HP dominates highway cruising easily
- 473 TQ pulls heavy custom chassis
- All aluminum engine drops vehicle weight
Description
Restore the legendary reliability of your daily driver with the Honda R18A1 1.8L Remanufactured Engine. This 1.8-liter inline-4 uses a highly efficient aluminum block and cylinder head configuration to deliver factory-fresh smooth operation and incredible fuel economy. Completely torn down and remanufactured using precision CNC machining to correct factory wear patterns, this drop-in replacement engine guarantees your eighth-generation Civic gets back on the road safely.
Key Features of Honda R18A1 1.8L
- Complete Factory Remanufacturing: Disassembled, cleaned, and precision-machined to establish exact factory-fresh internal tolerances.
- Aluminum Cylinder Head: Fully reconditioned with multi-angle valve jobs and new valve stem seals to restore optimal compression.
- Precision Bored Cylinders: Honed with torque plates to ensure perfect piston ring sealing and eliminate annoying oil consumption.
- Micro-Polished Crankshaft: Ground to exact specifications to maximize bearing lifespan and ensure smooth four-cylinder operation.
- i-VTEC Valvetrain: Retains Honda’s legendary variable valve timing system to balance low-end torque with highway fuel efficiency.
- New Gaskets & Seals: Assembled with premium replacement gaskets to ensure a completely leak-free installation right out of the crate.
Component Breakdown: Remanufactured Long Block Configuration
This replacement assembly includes the essential internal components completely pre-installed.
- Features a fully assembled aluminum cylinder head attached and torqued to the precision-machined short block
- Contains the pre-installed overhead camshaft valves and matching valvetrain hardware pre-lubricated for assembly
Vehicle Fitment & Compatibility Matrix
Verify your specific trim level before purchasing to ensure accessory bracket alignment. Swapping in a remanufactured Honda 1.8L engine keeps your daily commuter running for years to come.
- Fits 2006-2011 Honda Civic DX LX and EX models equipped with the 1.8L R18A1 naturally aspirated engine
- Fits 2006-2011 Honda Civic coupes and sedans utilizing either manual or automatic factory transmissions
- Fits select international Honda variants utilizing the R18 family 1.8-liter SOHC i-VTEC architecture
Fuel & Ignition System Requirements
Transfer your existing external components to get this remanufactured engine running perfectly.
- Requires the original multi-point fuel injection intake manifold and factory Honda fuel rail
- Operates seamlessly with the OEM coil-on-plug ignition system and factory engine control unit
Installation, Break-In Oil & Priming Instructions
Strict adherence to startup protocols prevents premature failure of the new bearings.
- Prime the oiling system manually by disabling the fuel injectors and cranking the engine before the final startup
- Fill the crankcase with premium conventional oil for the first 500 miles before switching to your preferred synthetic blend
USA Warranty, Emissions & Logistics
Backed by comprehensive coverage and straightforward commercial shipping logistics.
- Covered by a standard remanufactured engine warranty protecting against defects in workmanship and materials
- Complies with original factory emission standards when used with intact OEM exhaust and catalytic converters
Honda R18A1 1.8L L4 Remanufactured Engine – 2006-2011 Additional Info
| Weight | 190 lbs |
| Dimensions | 36 × 36 × 36 in |
| Important Notes | R18A1 Eng. |
| Block Casting | R18A1, RNA |
| Crank Casting | RNA |
| Body Style | 1799 |
| Fuel Type | Gasoline |
| Displacement | 1.8L |
| Number of Cylinders | 4 |
| Product Type | Engines |
| Block Type | L |
| Head Type | SOHC |
| Number of Valves | 16 |
Honda R18A1 1.8L L4 Remanufactured Engine – 2006-2011 Vehicle Fitment
| Year | Make | Model | Engine | Note |
|---|---|---|---|---|
| 2006 - 2011 | Honda | Civic | L4 1.8L 1799cc | In-Line Head Cast # RNA, R60, Cam Cast # RNA, Crank Cast # RNA, Block Cast # R18A1, RNA, Chain Driven Cam, Screw-in S/P Adapters |












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