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

Warnings

Tools required

Parts

• Complete gasket set (head, oil pan, valve cover, timing cover) × 1 — Use OEM specification
• Piston ring set (standard or oversize as measured) × 1 — Use OEM specification
• Main bearing set (standard or undersize as measured) × 1 — Use OEM specification
• Rod bearing set (standard or undersize as measured) × 1 — Use OEM specification
• Cylinder head bolts (TTY) × 1 — Use OEM specification
• Main bearing cap bolts (TTY) × 1 — Use OEM specification
• Connecting rod bolts (TTY) × 1 — Use OEM specification
• Timing chain kit (chain, guides, tensioner) × 1 — Use OEM specification
• Oil pump assembly or rebuild kit × 1 — Use OEM specification
• Water pump × 1 — Use OEM specification
• Thermostat with O-ring × 1 — Use OEM specification
• Valve stem seals × 1 — Use OEM specification
• Crankshaft front seal × 1 — Use OEM specification
• Crankshaft rear seal × 1 — Use OEM specification
• Camshaft seals × 1 — Use OEM specification
• Oil filter × 1 — Use OEM specification
• Oil drain plug crush washer × 1 — Use OEM specification
• Spark plugs × 4 — Use OEM specification
• Engine oil 0W-20 × 1 — Honda Genuine 0W-20
• Engine coolant Type 2 (Blue) × 1 — Honda Type 2
• RTV gasket maker (Honda Bond HT or equivalent) × 1 — Use OEM specification
• Anti-seize compound × 1 — Nickel-based high temp
• Engine assembly lube × 1 — Use OEM specification
• Brake cleaner and shop towels × 1 — Use OEM specification

Fluids

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

Preparation

1. Remove engine from vehicle and mount securely on engine stand
2. Clean exterior of engine thoroughly with degreaser before disassembly to prevent contamination
3. Drain all remaining oil and coolant into appropriate containers
4. Remove all external components: turbocharger, exhaust manifold, intake manifold, fuel rail, ignition coils, alternator, starter, and all sensors
5. Label and photograph all electrical connectors and hose positions for reassembly reference
6. Organize workspace with clean assembly area, parts bins for hardware organization by component, and measurement recording system
7. Have machine shop contact information ready for cylinder head resurfacing, cylinder boring/honing if needed, and crankshaft inspection/grinding
8. Review Honda service manual specifications for all bearing clearances, piston-to-wall clearances, ring gaps, and wear limits

Procedure

1. 1

   Remove valve cover and timing components
   Remove valve cover bolts in reverse of tightening sequence. Remove timing chain cover bolts including 8mm bolts. Rotate crankshaft to TDC on cylinder #1 and verify timing marks alignment on camshaft sprockets and crankshaft. Remove timing chain tensioner bolt, then remove tensioner. Remove timing chain guides and chain. Mark camshaft sprocket positions before removal.
   Torque spec

   Cover Bolts15 Nm (11 lb-ft)

   Timing Chain Tensioner Bolt25 Nm (18 lb-ft)

   Timing Chain Guide Bolts12 Nm (9 lb-ft)
2. 2

   Remove cylinder head assembly
   Remove camshaft bearing cap bolts in reverse sequence (outside to center). Carefully lift camshafts and store in order. Remove cylinder head bolts in reverse of tightening sequence (start from outside, work toward center in 2-3 passes). Lift cylinder head straight up to prevent damage to deck surface. Place on clean padded surface with combustion chambers facing up.
   ⚠Cylinder head bolts are TTY and must be discarded. Never reuse.
   Torque spec

   Camshaft Bearing Cap Bolts14 Nm (10 lb-ft)

   Cylinder Head Bolts65 Nm (48 lb-ft)
3. 3

   Disassemble and inspect cylinder head
   Use valve spring compressor to remove valve keepers, retainers, springs, and valves. Keep all components organized by cylinder. Inspect valves for burning, pitting, and stem wear. Measure valve stem diameter and compare to specifications. Remove valve stem seals. Inspect camshafts for scoring, measure cam lobe height and bearing journal diameter. Check cylinder head deck surface with straightedge and feeler gauge for warpage (maximum 0.002 inch). Send head to machine shop for resurfacing, valve grinding/lapping, and seat reconditioning as needed.
4. 4

   Remove oil pan and oil pump
   Remove oil pan bolts in reverse sequence. Carefully pry pan free using plastic pry tools to avoid damaging sealing surfaces. Remove oil pump pickup tube bolt, then remove oil pump mounting bolts. Remove oil pump assembly and inspect for wear, scoring, or debris damage. Measure oil pump clearances per service manual specifications.
   Torque spec

   Oil Pan Bolts12 Nm (9 lb-ft)

   Oil Pump Pickup Tube12 Nm (9 lb-ft)

   Oil Pump Bolts12 Nm (9 lb-ft)
5. 5

   Remove pistons and connecting rods
   Use ridge reamer to remove wear ridge at top of each cylinder bore before removing pistons. Rotate crankshaft to position connecting rod at bottom dead center. Mark connecting rods and caps with cylinder number and orientation using permanent marker. Remove connecting rod bolts. Push piston and rod assembly up through top of block, being careful not to damage crankshaft journals. Keep rod caps matched with their respective rods. Inspect pistons for scoring, cracking, and ring land damage.
   ⚠Connecting rod bolts are TTY and must be replaced. Mark rod and cap orientation before separation.
   ⚠Failure to remove wear ridge can crack piston ring lands during removal.
   Torque spec

   Connecting Rod Bolts45 Nm (33 lb-ft)
6. 6

   Remove crankshaft and main bearings
   Mark main bearing caps with position numbers and directional arrows. Remove main bearing cap bolts in reverse sequence (start from ends, work toward center). Carefully lift main caps and keep in order. Lift crankshaft straight out of block. Inspect crankshaft journals for scoring, heat discoloration, or out-of-round condition. Measure all main and rod journals with micrometer. Send crankshaft to machine shop for grinding if journals are out of specification (typical limit 0.001 inch taper or out-of-round).
   ⚠Main bearing cap bolts are TTY and must be replaced. Main caps must be reinstalled in exact original positions.
   Torque spec

   Main Bearing Cap Bolts75 Nm (55 lb-ft)
7. 7

   Inspect and measure engine block
   Clean all cylinder bores thoroughly with solvent and lint-free cloths. Inspect bores for scoring, scuffing, or vertical scratches. Measure cylinder bore diameter at top, middle, and bottom in two directions (parallel and perpendicular to crankshaft) using bore gauge. Calculate taper and out-of-round. If taper exceeds 0.002 inch or out-of-round exceeds 0.001 inch, cylinder boring and oversize pistons are required. Measure deck surface flatness with straightedge. Inspect main bearing bores for damage. Send block to machine shop for hot tank cleaning, bore honing or boring, and deck resurfacing if needed.
8. 8

   Clean and prepare all components
   Thoroughly clean engine block, cylinder head, crankshaft, connecting rods, and all reusable components. Use hot tank or suitable solvent cleaning method. Clean all oil passages with rifle brush and compressed air. Ensure all surfaces are absolutely clean and dry. Blow out all bolt holes with compressed air. Inspect balance shaft assembly if equipped and measure bearing clearances.
9. 9

   Install main bearings and crankshaft
   Install main bearing upper halves in block, ensuring oil holes align. Install main bearing lower halves in caps. Apply thin coat of engine assembly lube to all bearing surfaces. Carefully lower crankshaft into block. Install main bearing caps in correct positions with arrows pointing toward front of engine. Install NEW main bearing cap bolts. Torque main cap bolts to 75 Nm (55 lb-ft) in sequence from center outward, then tighten additional angle per service manual specification (typically 90 degrees additional). Check crankshaft endplay with dial indicator (typical specification 0.004-0.014 inch). Verify crankshaft rotates freely by hand.
   ⚠Use NEW main bearing cap bolts only. Follow torque-plus-angle procedure precisely.
   ℹ️Before final torque, verify bearing clearances using Plastigage. Proper clearance is typically 0.0009-0.0017 inch for mains.
   Torque spec

   Main Bearing Cap Bolts75 Nm (55 lb-ft)
10. 10

    Assemble pistons with rings and install
    Install new piston rings on pistons using ring expander tool. Install oil control ring first (expander then rails), then lower compression ring, then top compression ring. Verify ring end gaps are properly positioned (stagger gaps 120 degrees apart). Measure piston ring end gap in cylinder bore (typically 0.006-0.012 inch for top ring). Apply engine assembly lube to pistons, rings, and cylinder walls. Install rod bearings in connecting rods and caps with assembly lube. Compress piston rings using ring compressor. Insert piston/rod assembly into correct cylinder with orientation mark toward front. Guide rod onto crankshaft journal. Install rod cap in correct orientation. Install NEW connecting rod bolts and torque to 45 Nm (33 lb-ft) plus additional angle per specification (typically 60-90 degrees additional). Verify rod side clearance on crankshaft journal.
    ⚠Use NEW connecting rod bolts only. Ensure pistons are installed in correct cylinders with correct orientation.
    ℹ️Check rod bearing clearance with Plastigage before final torque. Typical specification is 0.0008-0.0015 inch.
    Torque spec

    Connecting Rod Bolts45 Nm (33 lb-ft)
11. 11

    Install oil pump and oil pan
    Install new crankshaft front seal in timing cover. Install oil pump with new O-ring using assembly lube. Torque oil pump bolts to 12 Nm (9 lb-ft). Install oil pump pickup tube with new O-ring and torque bolt to 12 Nm (9 lb-ft). Verify pickup tube-to-pan clearance is within specification. Clean oil pan and block sealing surfaces thoroughly. Apply thin bead of RTV sealant to oil pan groove per service manual pattern. Install oil pan and torque bolts to 12 Nm (9 lb-ft) in sequence from center outward. Allow RTV to cure per manufacturer instructions before adding oil.
    ℹ️Do not overtighten oil pan bolts as this can distort the pan and cause leaks.
    Torque spec

    Oil Pump Bolts12 Nm (9 lb-ft)

    Oil Pump Pickup Tube12 Nm (9 lb-ft)

    Oil Pan Bolts12 Nm (9 lb-ft)
12. 12

    Reassemble cylinder head
    Install new valve stem seals on valve guides using appropriate driver tool. Lubricate valve stems and install valves in correct positions. Install valve springs, retainers, and keepers using spring compressor. Verify keepers are properly seated. Install rebuilt/resurfaced cylinder head with new head gasket (check gasket orientation markings). Install NEW cylinder head bolts with light oil on threads. Torque cylinder head bolts in sequence from center outward to 65 Nm (48 lb-ft) in multiple passes, then tighten additional angle per specification (typically 90 degrees in steps). Install camshafts in correct positions with timing marks noted. Apply assembly lube to camshaft journals. Install camshaft bearing caps in correct sequence with markings. Torque camshaft bearing cap bolts to 14 Nm (10 lb-ft) in sequence from center outward in 3 passes.
    ⚠Use NEW cylinder head bolts only. Follow torque-plus-angle sequence precisely to prevent head gasket failure.
    Torque spec

    Cylinder Head Bolts65 Nm (48 lb-ft)

    Camshaft Bearing Cap Bolts14 Nm (10 lb-ft)
13. 13

    Install timing chain system
    Install timing chain guides and torque bolts to 12 Nm (9 lb-ft). Verify crankshaft is at TDC for cylinder #1. Install camshaft sprockets in correct positions aligned with timing marks. Route new timing chain over sprockets with timing marks properly aligned per service manual. Compress timing chain tensioner and lock with pin or clip. Install tensioner and torque bolt to 25 Nm (18 lb-ft), then release tensioner pin. Rotate crankshaft two complete revolutions and verify all timing marks realign correctly. Clean timing cover sealing surface and install new gasket. Apply RTV to specified areas. Install timing cover and torque 8mm bolts to 25 Nm (18 lb-ft) in sequence. Install new crankshaft seal and crankshaft pulley. Use holding tool and torque crankshaft pulley bolt to 180 Nm (133 lb-ft).
    ⚠Timing chain alignment is critical. Verify marks align after rotating crankshaft two full turns before final assembly.
    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)
14. 14

    Install valve cover and external components
    Clean valve cover and cylinder head sealing surfaces. Install new valve cover gasket. Install valve cover and torque bolts to 10 Nm (7 lb-ft) in sequence from center outward. Install all external components: intake manifold with new gasket (torque bolts to 25 Nm/18 lb-ft), exhaust manifold with new gasket and anti-seize on studs (torque nuts to 30 Nm/22 lb-ft working hot-to-cold pattern), turbocharger, fuel system components, ignition coils, sensors, alternator, starter, and all remaining accessories. Install new spark plugs. Reconnect all electrical connections and hoses per documentation from disassembly.
    ℹ️Apply anti-seize to exhaust manifold studs to prevent future seizing.
    Torque spec

    Cover Bolts15 Nm (11 lb-ft)

    Intake Manifold Bolts25 Nm (18 lb-ft)

    Exhaust Manifold Nuts30 Nm (22 lb-ft)
15. 15

    Final preparation and initial start
    Install oil filter and fill engine with 4.0 quarts Honda Genuine 0W-20 oil. Fill cooling system with 6.0 quarts Honda Type 2 coolant and bleed air from system. Verify oil drain plug is installed with new crush washer and torqued to 35 Nm (26 lb-ft). Perform final visual inspection of all connections, bolts, and components. Prime oil system by cranking engine with fuel system disabled until oil pressure registers. Enable fuel system and start engine. Monitor for leaks, unusual noises, and proper oil pressure. Allow engine to warm to operating temperature while monitoring coolant level and temperature. Check for proper operation of all systems. Perform initial break-in procedure per manufacturer recommendations (avoid high RPM and heavy loads for first 500 miles).
    ⚠Do not run engine above 4000 RPM during initial start and break-in period. New rings require proper seating.
    Torque spec

    Oil Drain Plug35 Nm (26 lb-ft)

Reassembly

1. Reinstall engine in vehicle following reverse of removal procedure
2. Reconnect all engine mounts torquing bolts to 45 Nm (33 lb-ft) for critical mounting bolts
3. Reconnect exhaust system, drive axles, cooling system hoses, and all remaining connections
4. Verify all fluid levels are correct before final test drive
5. Reset engine computer adaptations and clear any stored diagnostic codes
6. Perform road test under varying load conditions to verify proper operation

Verification

• Check for any oil, coolant, or fuel leaks after initial start and after test drive
• Verify proper oil pressure at idle and under acceleration (typically 25+ PSI at idle when warm)
• Confirm engine operates smoothly without unusual noises, vibrations, or misfires
• Monitor engine temperature to ensure proper cooling system operation (typically 180-200°F)
• Scan for diagnostic trouble codes using OBD-II scanner
• Verify turbocharger boost pressure builds properly under acceleration
• Check valve cover, timing cover, and oil pan for leaks after engine reaches operating temperature
• Recheck all fluid levels after test drive and top off as needed
• Document break-in mileage and schedule follow-up oil change at 500 miles
• Verify no exhaust leaks at manifold connections
• Confirm all sensors are functioning correctly with scan tool data review

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