Replace the front crankshaft oil seal on the 2018-2024 Honda Accord 1.5L Turbo by removing the timing cover, extracting the old seal, and installing a new seal with proper alignment.

Warnings

Tools required

Parts

• Front crankshaft oil seal × 1 — 91212-5G0-003 or equivalent OEM
• Timing cover gasket × 1 — Use OEM specification
• Crankshaft pulley bolt (if TTY) × 1 — Check service manual for TTY designation
• Oil drain plug crush washer × 1 — 94109-14000
• Engine oil × 1 — Honda Genuine 0W-20

Fluids

• Honda Genuine 0W-20 — 4 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery cable and wait 3 minutes for airbag system to discharge
3. Raise and safely support front of vehicle on jack stands
4. Remove engine splash shield and undercover panels
5. Drain engine oil and replace drain plug with new crush washer
6. Allow engine to cool completely if recently operated
7. Remove front wheels for better access to lower components
8. Place reference marks on crankshaft pulley and timing cover for timing verification

Procedure

1. 1

   Remove accessory drive belt and components
   Rotate the drive belt tensioner counterclockwise to release tension and remove the serpentine belt. Take a photo of the belt routing for reinstallation. Remove the drive belt tensioner and idler pulley assemblies if they obstruct access to the crankshaft pulley.
2. 2

   Remove crankshaft pulley bolt
   Install the crankshaft pulley holder tool to prevent crankshaft rotation. Using a breaker bar or impact wrench, remove the crankshaft pulley bolt (turns counterclockwise). This bolt is extremely tight at 180 Nm. If using a breaker bar, you may need an assistant to hold the pulley holder or brace the tool against the frame. Note: This bolt may be TTY (torque-to-yield) and require replacement.
   ⚠️Crankshaft must be held securely or vehicle can roll/move during bolt removal. Double-check jack stands and parking brake.
   Torque spec

   Crankshaft Pulley Bolt180 Nm (133 lb-ft)
3. 3

   Remove crankshaft pulley/harmonic balancer
   With the bolt removed, pull the crankshaft pulley straight off the crankshaft snout. It should slide off with moderate force. If stuck, use a harmonic balancer puller - never pry or hammer on the pulley. Inspect the keyway on the crankshaft for damage.
4. 4

   Remove right engine mount
   Support the engine with a jack placed under the oil pan (use a block of wood to distribute load). Remove the right side engine mount bracket bolts from the engine and chassis. This provides clearance to access the timing cover fully. Label all mounting bolts by location.
   ⚠Ensure engine jack is stable and will not slip. Engine weight must be supported throughout this procedure.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
5. 5

   Remove crankshaft position sensor
   Disconnect the electrical connector from the crankshaft position (CKP) sensor located on the timing cover. Remove the sensor mounting bolt and carefully extract the sensor. Store in a clean location to prevent contamination.
   Torque spec

   Sensor Bolts10 Nm (8 lb-ft)
6. 6

   Remove timing cover bolts
   Remove all timing cover bolts in a crisscross pattern, working from outside toward center. There are both 10mm and 8mm bolts - keep them organized by size. Note that some bolts may have different lengths. Remove the front section of the oil pan bolts that attach to the timing cover if applicable.
   Torque spec

   Cover Bolts15 Nm (11 lb-ft)

   Oil Pan Bolts12 Nm (9 lb-ft)
7. 7

   Remove timing cover
   Carefully pry the timing cover away from the engine block using plastic pry tools at the designated pry points. Do not pry near seal surfaces. Once loose, pull the cover straight off. The old gasket will likely remain stuck to the block - this is normal.
   ⚠Do not damage the timing cover mating surface or oil seal bore. Metal pry tools can cause permanent damage requiring cover replacement.
8. 8

   Remove old front crankshaft seal
   Using a seal puller or seal removal tool, carefully extract the old seal from the timing cover. Hook the tool behind the seal lip and pull evenly to avoid cocking the seal. Alternatively, carefully drill a small hole in the seal face and use a slide hammer. Clean the seal bore thoroughly with brake cleaner and inspect for damage, scoring, or grooves.
   ⚠Absolutely critical: Do not scratch or gouge the seal bore in the timing cover or the crankshaft seal surface. Any damage will cause immediate oil leaks.
9. 9

   Clean all mating surfaces
   Remove all old gasket material from the engine block and timing cover using a plastic gasket scraper. Clean surfaces with brake cleaner until completely free of oil, debris, and RTV residue. Inspect the crankshaft snout for scoring, grooves, or damage where the seal rides. Minor imperfections can be polished with fine emery cloth.
10. 10

    Install new front crankshaft seal
    Lightly coat the outer diameter of the new seal with clean engine oil. Apply a thin film of oil to the seal lip. Position the seal squarely in the timing cover bore with the spring side facing inward (toward engine). Using the appropriate size seal driver, tap the seal evenly into place until it seats flush with the cover surface. Verify the seal is fully seated and not cocked.
    ⚠Seal must be driven in perfectly square. A cocked seal will leak immediately. Use proper size driver that contacts only the outer edge of the seal.
11. 11

    Install new timing cover gasket
    Install the new timing cover gasket onto the engine block, aligning all bolt holes. Apply a small bead (2-3mm) of Honda Bond HT RTV silicone at the cylinder head-to-block junction and at the oil pan-to-block junction where the timing cover mates. The gasket should have locating pins or tabs to hold it in position.
    ℹ️Honda Bond HT must be applied and the cover installed within 5 minutes before RTV begins to cure. Work efficiently.
12. 12

    Install timing cover
    Carefully position the timing cover onto the engine block, ensuring the seal lip properly engages the crankshaft snout without rolling or folding. Align all bolt holes and press the cover into place. Rotate the crankshaft slightly by hand to help the seal lip engage properly. Install all timing cover bolts finger-tight first.
13. 13

    Torque timing cover bolts
    Torque the 10mm timing cover bolts to 45 Nm (33 lb-ft) in a crisscross sequence starting from the center and working outward. Then torque the 8mm bolts to 25 Nm (18 lb-ft) in the same pattern. If applicable, torque the front oil pan bolts that attach to the timing cover to 12 Nm (9 lb-ft). Follow Honda's specified tightening sequence if available in the service manual.
    ⚠Improper torque sequence can warp the timing cover and cause oil leaks. Follow sequence precisely and do not over-torque.
    Torque spec

    Cover Bolts15 Nm (11 lb-ft)

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

    Reinstall crankshaft position sensor
    Install the crankshaft position sensor into its bore in the timing cover. Torque the sensor bolt to 10 Nm (8 lb-ft). Reconnect the electrical connector and ensure it clicks into place securely.
    Torque spec

    Sensor Bolts10 Nm (8 lb-ft)
15. 15

    Reinstall crankshaft pulley and torque bolt
    Slide the crankshaft pulley onto the crankshaft snout, aligning the keyway. Install the crankshaft pulley bolt (use new bolt if TTY type). Hold the crankshaft with the pulley holder tool and torque the bolt to 180 Nm (133 lb-ft). If specified as TTY in the service manual, follow the torque-plus-angle specification. An impact wrench is acceptable for final tightening.
    ℹ️Verify timing reference marks align after tightening to confirm crankshaft has not rotated.
    Torque spec

    Crankshaft Pulley Bolt180 Nm (133 lb-ft)

    Harmonic Balancer Bolt180 Nm (133 lb-ft)
16. 16

    Reinstall engine mount and accessory components
    Reinstall the right engine mount bracket with mounting bolts. Torque the 12mm mounting bolts to 45 Nm (33 lb-ft) and 10mm mounting bolts to 26 Nm (19 lb-ft) based on bolt size and location. Remove the engine support jack. Reinstall the drive belt tensioner and idler pulley assemblies if removed, then install the serpentine belt following the routing diagram.
    Torque spec

    Mounting Bolts26 Nm (19 lb-ft)

Reassembly

1. Reinstall engine splash shields and undercover panels
2. Reinstall front wheels and torque lug nuts to specification
3. Lower vehicle from jack stands
4. Fill engine with 4.0 quarts of Honda Genuine 0W-20 engine oil
5. Reconnect negative battery cable

Verification

• Start engine and verify no warning lights illuminate on dashboard
• Allow engine to idle and inspect timing cover area for oil leaks, particularly around the front seal
• Check engine oil level and top off if necessary
• Rev engine to 2500-3000 RPM and verify no leaks develop under pressure
• Test drive vehicle and re-inspect for leaks after 50-100 miles of operation
• Monitor oil level closely for the first week to detect slow leaks

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