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2017 Sportage 2.4L knocking noise and high oil consumption

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Mike T. · rep 0 · May 25, 2:07 AM · 1 replies · solved · Question

Vehicle: 2017 Kia Sportage EX

Hello forum,

I'm reaching out about a serious concern with my 2017 Kia Sportage EX, equipped with the 2.4L GDI engine. Over the past few months, I've noticed a distinct knocking sound coming from the engine, especially noticeable on startup and under acceleration. It sounds like it's coming from the bottom end.

In addition to the knocking, the car has been consuming a significant amount of oil. I have to add a quart or more between oil changes, which is something I never had to do before. There's no visible oil leak under the car or smoke from the exhaust.

My Sportage has about 90,000 miles on it. I'm really worried this could be a major engine problem. Has anyone else experienced this with their 2.4L Kia engine? What could be the cause, and what are my options here? I'm hoping it's not what I think it is.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:07 AM

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ClearTheCode admin answer:

The symptoms you're describing for your 2017 Kia Sportage 2.4L GDI engine – specifically a knocking noise and excessive oil consumption – are unfortunately well-documented issues for certain Kia/Hyundai Theta II engines (which includes your 2.4L GDI). These engines have been subject to recalls and extended warranties due to manufacturing defects that can lead to premature bearing wear and engine failure.

Common Causes:

  1. Connecting Rod Bearing Failure: This is the most common and severe cause. Defects in the manufacturing process can lead to premature wear of the connecting rod bearings. As they wear, they create excessive clearance, leading to a metallic knocking sound, particularly noticeable during cold starts or under load.
  2. Piston Ring Issues: Faulty piston rings can lead to excessive oil consumption because oil bypasses the rings and burns in the combustion chamber. This can also contribute to carbon buildup and reduced engine efficiency.

Troubleshooting Steps:

  1. Check for Recalls/TSBs: Verify if your specific VIN is covered under any recalls or Technical Service Bulletins (TSBs) related to the Theta II engine. Kia has issued several.
  2. Monitor Oil Level Religiously: Continue to check your oil level frequently and top it off as needed to prevent further damage, though this is a temporary measure.

When to See a Shop:

This is a critical issue that requires immediate professional attention. Do not delay taking your vehicle to a Kia dealership. They are equipped to diagnose these specific engine problems.

  • Engine Inspection: The dealer will likely perform a thorough inspection, which may include using a stethoscope to pinpoint the knock, checking oil pressure, and potentially performing an engine tear-down or inspection with a borescope.
  • OBD Codes: While a knocking sound might not always trigger a Check Engine Light immediately, the excessive oil consumption might eventually lead to codes like P0420 (Catalyst System Efficiency Below Threshold) due to oil burning, or misfire codes (P030X).
  • Warranty/Recall Claim: If your vehicle falls within the affected VIN range and mileage/age criteria for the extended warranty or recall, Kia may cover the cost of inspection, diagnosis, and potentially an engine replacement. Be prepared with all your service records.
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