Complete disassembly, inspection, machining, and reassembly of the 1.5L turbocharged engine including crankshaft, pistons, timing components, cylinder head, and all internal components with precise torque specifications.

Warnings

Tools required

Parts

• Complete engine gasket kit × 1 — Use OEM Honda gasket set
• Piston ring set (standard or oversized) × 1 — Match to bore size after machining
• Main bearing set × 1 — Match to crankshaft journal size
• Rod bearing set × 1 — Match to crankshaft journal size
• Timing chain kit × 1 — Includes chain, guides, tensioner
• Camshaft seal × 1 — Use OEM specification
• Crankshaft front seal × 1 — Use OEM specification
• Crankshaft rear seal × 1 — Use OEM specification
• Oil pump (if worn) × 1 — Inspect and replace as needed
• Water pump × 1 — Replace during rebuild
• Thermostat and O-ring × 1 — Use OEM specification
• Valve stem seals × 1 — Use OEM specification
• Connecting rod bolts (TTY) × 4 — Always replace TTY bolts
• Main bearing cap bolts (TTY) × 1 — Always replace TTY bolts
• Cylinder head bolts (TTY) × 1 — Always replace TTY bolts
• Oil filter × 1 — Use OEM specification
• Oil drain plug crush washer × 1 — Use OEM specification
• Spark plugs × 4 — NGK or OEM equivalent
• Engine assembly lube × 1 — Use manufacturer approved
• RTV silicone gasket maker × 1 — Honda Bond HT or equivalent
• Thread locker (medium strength) × 1 — Blue Loctite or equivalent

Fluids

• Honda Genuine 0W-20 — 4 qt
• Honda Type 2 Coolant (Blue) — 6 qt

Preparation

1. Disconnect negative battery terminal and wait 3 minutes
2. Drain all engine oil and coolant into appropriate containers
3. Remove engine from vehicle using proper lifting procedures and mount on engine stand
4. Clean exterior of engine thoroughly before disassembly
5. Photograph or label all electrical connectors, vacuum lines, and component positions
6. Obtain all measurements from machine shop for bearing clearances and cylinder bore specifications
7. Prepare clean workspace with organized parts trays and labeling system
8. Have complete service manual available for reference diagrams

Procedure

1. 1

   Remove External Components
   Remove turbocharger, exhaust manifold, intake manifold, fuel rail and injectors, ignition coils, alternator, starter, and all accessory brackets. Remove valve cover and inspect valve train for obvious damage. Label and store all hardware in organized containers.
   ⚠Fuel system is under pressure. Relieve fuel pressure before disconnecting fuel lines.
   Torque spec

   Exhaust Manifold Nuts30 Nm (22 lb-ft)

   Intake Manifold Bolts25 Nm (18 lb-ft)

   Cover Bolts15 Nm (11 lb-ft)
2. 2

   Remove Timing Components
   Remove crankshaft pulley using holder tool and breaker bar or impact wrench. Remove timing cover and inspect timing chain for wear. Lock crankshaft and camshaft in TDC position using timing marks. Release timing chain tensioner and remove chain, guides, and tensioner. Mark chain direction if reusing.
   ⚠Do not rotate crankshaft or camshaft independently once timing chain is removed to prevent valve and piston contact.
   Torque spec

   Crankshaft Pulley Bolt180 Nm (133 lb-ft)

   Cover Bolts15 Nm (11 lb-ft)

   Timing Chain Tensioner Bolt25 Nm (18 lb-ft)

   Timing Chain Guide Bolts12 Nm (9 lb-ft)
3. 3

   Remove Cylinder Head
   Remove camshaft bearing caps in reverse sequence (outer to center) in 3 passes to prevent warping. Remove camshafts and label intake/exhaust position. Remove cylinder head bolts in reverse of tightening sequence in multiple passes. Carefully lift cylinder head straight up and place on clean padded surface. Do not pry between head and block.
   ⚠Cylinder head is aluminum and easily damaged. Handle carefully and do not lay on hard surfaces.
   Torque spec

   Camshaft Bearing Cap Bolts14 Nm (10 lb-ft)

   Cylinder Head Bolts65 Nm (48 lb-ft)
4. 4

   Inspect and Service Cylinder Head
   Remove all valves using valve spring compressor and inspect for wear. Have cylinder head inspected at machine shop for warpage (must be within 0.05mm), cracks, and valve seat condition. Have head resurfaced if needed. Replace valve stem seals. Check valve spring free length and tension. Lap valves to seats if necessary. Clean all carbon deposits from combustion chambers.
5. 5

   Remove Oil Pan and Oil Pump
   Remove oil pan bolts in reverse sequence and carefully separate pan from block. Remove oil pickup tube and oil pump assembly. Inspect oil pump rotors for wear and measure clearances. Replace oil pump if clearances exceed specification or if any scoring is present.
   ℹ️Clean all RTV residue from oil pan and block mating surfaces completely using plastic scraper to prevent debris entering engine.
   Torque spec

   Oil Pan Bolts12 Nm (9 lb-ft)

   Oil Pump Bolts12 Nm (9 lb-ft)

   Oil Pump Pickup Tube12 Nm (9 lb-ft)
6. 6

   Remove Pistons and Connecting Rods
   Rotate crankshaft to position each piston at top of stroke. Use ridge reamer to remove ridge at top of each cylinder. Mark each connecting rod and cap with cylinder number and orientation. Remove connecting rod bolts and carefully push piston and rod assembly out top of block. Keep rod caps with corresponding rods. Inspect rod bearings for wear patterns.
   ⚠Do not mix connecting rod caps between rods. Each cap is matched to its specific rod and numbered accordingly.
   Torque spec

   Connecting Rod Bolts45 Nm (33 lb-ft)
7. 7

   Remove Crankshaft and Main Bearings
   Mark main bearing caps for position and orientation. Remove main bearing cap bolts in reverse sequence. Carefully lift main bearing caps and set aside in order. Lift crankshaft straight out of block. Inspect all main and rod journal surfaces for scoring or wear. Measure all journals with micrometer and record measurements.
   ⚠Main bearing caps must be reinstalled in exact original position and orientation. Improper installation will cause immediate engine failure.
   Torque spec

   Main Bearing Cap Bolts75 Nm (55 lb-ft)
8. 8

   Inspect and Machine Block
   Clean block thoroughly in parts washer. Check block deck surface for warpage using precision straightedge. Measure cylinder bores for taper and out-of-round using bore gauge at top, middle, and bottom in two directions. Have block decked and bored/honed at machine shop if measurements exceed specification. Standard bore is 73.00mm, maximum overbore is typically 0.50mm.
   ℹ️Cylinders must have proper crosshatch pattern after honing for ring seating. Final hone should be 45-degree crosshatch at 0.025-0.050mm depth.
9. 9

   Inspect and Prepare Crankshaft
   Have crankshaft magnafluxed to check for cracks. Measure all main and rod journals. Have crankshaft ground to undersize if journals are worn, scored, or out-of-round beyond specification. Standard main journal diameter is 52.990-53.000mm, standard rod journal is 42.984-42.994mm. Clean all oil passages with rifle brush and compressed air.
10. 10

    Inspect and Prepare Pistons and Rods
    Remove old rings and clean pistons thoroughly. Inspect pistons for cracks, especially around pin bores and ring lands. Measure piston diameter at skirt 90 degrees from pin bore. Calculate piston-to-cylinder clearance (should be 0.008-0.020mm). Have pistons resized or replaced if worn. Inspect connecting rods for bending or twisting using rod alignment fixture at machine shop.
11. 11

    Install Main Bearings and Crankshaft
    Clean block and bearing saddles thoroughly. Install upper main bearings in block (with oil holes). Lubricate bearings with assembly lube. Carefully lower crankshaft into position. Install lower bearings in caps. Check bearing clearances using Plastigage (specification 0.025-0.047mm). Apply assembly lube to bearings. Install main bearing caps in correct position and orientation. Install new main cap bolts and torque to 75 Nm in sequence, then rotate additional angle per specification.
    ⚠Bearing clearances must be within specification. Excessive clearance causes low oil pressure; insufficient clearance causes bearing seizure.
    Torque spec

    Main Bearing Cap Bolts75 Nm (55 lb-ft)
12. 12

    Install Pistons and Connecting Rods
    Install new piston rings using ring expander tool, ensuring gaps are staggered 120 degrees apart. Install oil ring expander first, then oil ring rails, then second compression ring (marked side up), then top compression ring (marked side up). Lubricate cylinder walls with assembly lube. Install rod bearings and check clearances with Plastigage (specification 0.020-0.038mm). Lubricate bearings. Compress rings with ring compressor and tap piston into cylinder with wooden hammer handle, ensuring orientation mark faces front of engine. Install rod caps in correct orientation with new bolts, torque to 45 Nm plus angle per specification.
    ⚠Piston ring end gaps must be staggered and checked. Aligned gaps will cause blow-by and oil consumption.
    Torque spec

    Connecting Rod Bolts45 Nm (33 lb-ft)
13. 13

    Install Oil Pump and Oil Pan
    Install new crankshaft front seal using seal driver. Install oil pump with new O-rings and torque bolts to specification. Install oil pickup tube with new O-ring and torque to specification. Clean oil pan and block surfaces completely. Apply thin bead of RTV silicone to oil pan flange and install within 5 minutes. Torque oil pan bolts in sequence to specification.
    ℹ️RTV must cure for minimum 30 minutes before adding oil. Follow RTV manufacturer cure time specifications.
    Torque spec

    Oil Pump Bolts12 Nm (9 lb-ft)

    Oil Pump Pickup Tube12 Nm (9 lb-ft)

    Oil Pan Bolts12 Nm (9 lb-ft)
14. 14

    Install Cylinder Head
    Install new head gasket on block with orientation marks facing up. Carefully lower cylinder head onto block, ensuring dowel pins align. Install new cylinder head bolts hand tight. Torque cylinder head bolts in sequence to 65 Nm in multiple passes, then rotate additional angle per specification (typically 90 degrees, then additional 90 degrees). Install camshafts in correct positions (intake/exhaust) with lobes facing up on cylinder 1. Install bearing caps in sequence and torque from center outward in 3 passes to 14 Nm.
    ⚠Cylinder head bolt sequence and torque-to-yield procedure must be followed exactly. Improper torque causes head gasket failure or bolt breakage.
    Torque spec

    Cylinder Head Bolts65 Nm (48 lb-ft)

    Camshaft Cap Bolts14 Nm (10 lb-ft)
15. 15

    Install Timing Components
    Verify crankshaft is at TDC with keyway at 12 o'clock position. Install new crankshaft front seal if not already done. Install timing chain guides and torque bolts to specification. Compress timing chain tensioner and install retaining pin. Install timing chain with marks aligned to camshaft and crankshaft sprockets per service manual diagram. Install tensioner and torque bolt to specification, then remove retaining pin. Rotate crankshaft 2 complete revolutions and verify all timing marks align. Apply RTV to timing cover mating surfaces and install cover with new gasket, torque bolts in sequence to specification. Install crankshaft pulley and torque bolt to 180 Nm.
    ⚠️Timing chain installation is critical. Incorrect timing will cause immediate piston-to-valve contact and catastrophic engine damage when started.
    Torque spec

    Timing Chain Guide Bolts12 Nm (9 lb-ft)

    Timing Chain Tensioner Bolt25 Nm (18 lb-ft)

    Cover Bolts15 Nm (11 lb-ft)

    Crankshaft Pulley Bolt180 Nm (133 lb-ft)
16. 16

    Install Remaining Components and Fill Fluids
    Install valve cover with new gasket, torque bolts in sequence to 10 Nm. Install intake manifold with new gasket and torque bolts to 25 Nm. Install exhaust manifold with new gasket, apply anti-seize to studs, torque nuts to 30 Nm working from hot (center) to cold (outer). Install turbocharger with new gasket. Install all sensors, ignition coils, fuel rail, and remaining external components. Install new oil filter. Fill engine with 4 quarts of Honda Genuine 0W-20 oil. Fill cooling system with 6 quarts of Honda Type 2 coolant mixture.
    ℹ️Prime oil system before starting engine by cranking engine with fuel pump fuse removed until oil pressure is observed.
    Torque spec

    Cover Bolts15 Nm (11 lb-ft)

    Intake Manifold Bolts25 Nm (18 lb-ft)

    Exhaust Manifold Nuts30 Nm (22 lb-ft)

Reassembly

1. Reinstall engine into vehicle following reverse of removal procedure
2. Reconnect all electrical connectors, vacuum lines, and coolant hoses
3. Bleed cooling system to remove all air pockets
4. Double-check all fluid levels before starting
5. Verify all torque specifications were met during assembly

Verification

• Prime oil system by cranking engine without starting until oil pressure builds
• Start engine and verify oil pressure immediately (should be above 20 psi at idle)
• Check for any oil, coolant, or fuel leaks while engine runs
• Allow engine to reach operating temperature and verify thermostat opens and cooling fan cycles
• Listen for abnormal noises including knocking, ticking, or rattling
• Verify timing by checking idle quality and throttle response
• Check for exhaust leaks at manifold and turbocharger connections
• Perform initial break-in: avoid sustained high RPM or heavy load for first 500 miles
• Change oil and filter at 500 miles after rebuild to remove break-in debris
• Monitor oil consumption and coolant level during break-in period

More procedures for this vehicle