Oil Pan Gasket

Replace the oil pan gasket on a 2016-2024 Hyundai Tucson 2.5L I4 AWD engine by removing the subframe, exhaust components, and oil pan to access and replace the gasket.

Warnings

Tools required

Parts

• Oil pan gasket × 1 — Use OEM Hyundai gasket for 2.5L Smartstream engine
• Oil drain plug crush washer × 1 — 21513-23001 or equivalent
• Oil pickup tube O-ring × 1 — Inspect and replace if damaged
• Engine oil 0W-20 × 5 — Hyundai Genuine 0W-20
• Oil filter × 1 — Replace during oil pan service

Fluids

• Hyundai Genuine 0W-20 — 5 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow engine to cool completely if recently operated
3. Disconnect negative battery terminal
4. Raise vehicle and support securely on jack stands at all four corners
5. Remove engine under covers and splash shields
6. Install engine support fixture across engine bay to support engine weight during subframe lowering

Procedure

1. 1

   Drain engine oil
   Place drain pan under oil pan. Remove oil drain plug and allow oil to drain completely. Inspect drain plug threads and oil pan threads for damage. Install new crush washer on drain plug and reinstall finger-tight only at this stage (will torque after pan installation).
2. 2

   Remove front wheels and disconnect front suspension
   Remove both front wheels. Disconnect lower control arm ball joints from steering knuckles. Disconnect sway bar end links from lower control arms. Support front axles to prevent overextension of CV joints.
3. 3

   Disconnect exhaust system
   Disconnect exhaust downpipe from catalytic converter or exhaust manifold. Support exhaust system with wire or stand to prevent damage to hangers. Remove any heat shields blocking access to the subframe.
4. 4

   Support and lower front subframe
   Place transmission jack or adjustable jack stands under front subframe. Remove subframe mounting bolts (there are typically 4-6 main bolts). Slowly lower subframe approximately 4-6 inches to gain clearance for oil pan removal. Do not fully remove subframe unless necessary.
   ⚠Ensure engine is properly supported from above before loosening subframe bolts. Engine weight will shift as subframe lowers.
5. 5

   Remove oil pan mounting bolts
   Remove all oil pan bolts in a crisscross pattern starting from the outer edges working toward the center. There are approximately 16-20 bolts around the perimeter. Keep bolts organized as some may be different lengths.
   Torque spec

   Oil Pan Bolts12 Nm (9 lb-ft)
6. 6

   Separate and remove oil pan
   Carefully use a plastic gasket scraper or pry tool to break the gasket seal. Work around the entire perimeter gently to avoid damaging the aluminum oil pan or engine block mating surface. Once free, lower the oil pan carefully, being mindful of the oil pickup tube. Remove oil pan from underneath the vehicle.
   ⚠Do not pry excessively or use metal tools that could gouge the aluminum sealing surfaces. Even minor damage can cause future leaks.
7. 7

   Remove and inspect oil pickup tube
   Remove the oil pickup tube mounting bolts and carefully remove the pickup tube. Inspect the pickup tube O-ring for damage, cracking, or compression. Inspect the pickup screen for debris or damage. Clean screen if necessary. Replace O-ring if any damage is present.
8. 8

   Clean all gasket surfaces
   Thoroughly clean the oil pan mating surface and engine block mating surface using a plastic scraper and brake cleaner. Remove all traces of old gasket material, RTV sealant, and oil residue. Inspect surfaces for damage, warping, or cracks. The surfaces must be completely clean and dry for proper gasket sealing.
   ℹ️Use only plastic scrapers on aluminum surfaces. Metal scrapers will gouge the soft aluminum and create leak paths.
9. 9

   Install new gasket and prepare oil pan
   Position the new oil pan gasket on the oil pan. Some gaskets are adhesive-backed and will stick to the pan; others may require a small amount of RTV at corners only (check gasket instructions). If the oil level sensor was removed, reinstall it now with a new O-ring if required.
10. 10

    Reinstall oil pickup tube
    Install new O-ring on oil pickup tube (lubricate lightly with clean engine oil). Carefully position the pickup tube into the engine block, ensuring proper alignment. Install and torque the pickup tube bolts to specification.
11. 11

    Install oil pan
    Carefully raise the oil pan into position, aligning it with the engine block. Start all oil pan bolts by hand, threading them in gently. Once all bolts are started, torque them in sequence from the center outward in a crisscross pattern to the specified torque. Make multiple passes, gradually increasing torque to avoid distorting the pan.
    ⚠Oil pan bolts thread into aluminum. Do not cross-thread or overtorque, as this will strip the threads and require expensive repair.
    Torque spec

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

    Raise and secure subframe
    Raise the subframe back into position using the transmission jack. Align all subframe mounting points carefully. Install subframe mounting bolts and torque to specification in a crisscross pattern.
13. 13

    Reconnect suspension and exhaust
    Reconnect lower control arm ball joints to steering knuckles and torque fasteners to specification. Reconnect sway bar end links. Reconnect exhaust downpipe with new gaskets if required. Reinstall any heat shields removed earlier.
14. 14

    Torque drain plug and refill oil
    Torque the oil drain plug to specification with the new crush washer installed. Install new oil filter and pre-fill with oil. Add the specified amount of 0W-20 engine oil through the oil filler cap (approximately 5 quarts, verify with dipstick).
    Torque spec

    Oil Drain Plug35 Nm (26 lb-ft)
15. 15

    Final inspection and test
    Reinstall wheels and torque lug nuts to specification. Reinstall under covers and splash shields. Remove engine support fixture. Reconnect battery negative terminal. Start engine and check immediately for leaks around oil pan. Allow engine to reach operating temperature while monitoring for leaks. Shut off engine, wait 5 minutes, and recheck oil level.

Reassembly

1. Torque all fasteners to specification using a calibrated torque wrench
2. Always torque oil pan bolts in sequence from center outward to prevent warping
3. Use new gaskets and seals for all disturbed components
4. Double-check that all suspension and subframe fasteners are properly torqued before driving

Verification

• Start engine and visually inspect oil pan for leaks while engine is running
• Check oil pressure warning light extinguishes within 2-3 seconds of starting
• Allow engine to reach operating temperature and recheck for leaks
• After test drive, recheck oil level and inspect pan area for fresh oil leaks
• Verify no unusual noises from engine or suspension components
• Check that all under covers are securely reinstalled

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