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Loud Ticking/Knocking from 2020 Elantra 2.0L Engine

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Mike T. · rep 0 · May 25, 2:00 AM · 1 replies · solved · Question

Vehicle: 2020 Hyundai Elantra Limited

Hey everyone,

I've got a 2020 Hyundai Elantra Limited with the 2.0L engine, and I've started noticing a distinct ticking or knocking sound coming from the engine bay. It's not super loud, but it's definitely audible, especially when I'm accelerating or the engine is under load. It seems to get a bit louder as the RPMs increase.

I've checked the oil level, and it's fine. There's no check engine light, and the car seems to be driving normally otherwise, but this noise is really concerning me. I'm worried it might be something serious.

Has anyone else experienced this with their Elantra? What could be the cause of this kind of engine noise?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:00 AM

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ClearTheCode admin answer:

An unusual ticking or knocking sound from the engine, especially under load, is a serious concern and warrants immediate attention. Here's what could be happening with your 2020 Hyundai Elantra's 2.0L engine:

  1. Rod Bearing Failure: Unfortunately, some Hyundai and Kia 2.0L and 2.4L GDI engines (including those in the Elantra) have been known for premature rod bearing wear, which can manifest as a knocking sound. This is a critical issue that can lead to catastrophic engine failure if not addressed.
  2. Low Oil Pressure/Level: While you've checked the oil level, low oil pressure (even with a full dipstick) can prevent proper lubrication, causing internal engine components to wear and create noise. A faulty oil pump or clogged oil pickup screen could be culprits.
  3. Timing Chain/Tensioner Issues: A worn timing chain or a failing hydraulic tensioner can create a rattling or ticking noise, especially on startup or when the engine is under varying loads.
  4. Valve Train Noise: Issues with hydraulic lash adjusters (HLAs), rocker arms, or camshafts can also produce ticking sounds, often due to inadequate lubrication or wear.

What to do:

  • Listen Carefully: Try to pinpoint the location of the sound. Is it coming from the top, middle, or bottom of the engine? Does it change with engine temperature?
  • Check Oil Pressure (Professional): A shop can connect a mechanical gauge to verify actual oil pressure, which is more reliable than just checking the dipstick.

When to see a shop:

Given the potential for severe engine damage, it is critical to have your Elantra inspected by a Hyundai dealership or a trusted mechanic immediately. Do not delay. Continuing to drive with a potential rod bearing issue can quickly lead to complete engine seizure. The dealership can check for any relevant recalls or extended warranties related to engine issues for your specific VIN.

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