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2016 XC60 T5 Oil Consumption & PCV Valve: Is it a Common Issue?

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Mike T. · rep 0 · May 25, 3:57 AM · 1 replies · solved · Question

Vehicle: 2016 Volvo XC60 T5 Drive-E

Hello everyone,

I have a 2016 Volvo XC60 T5 (Drive-E engine) with about 95,000 miles on it. Lately, I've noticed it's consuming a fair amount of oil between changes – I'm having to add about a quart every 2,000-3,000 miles. There are no visible leaks, and no smoke from the exhaust that I can see.

I've read online that some of these Drive-E engines can have issues with PCV (Positive Crankcase Ventilation) systems leading to increased oil consumption. Is this a common problem for my model year and engine? Could a failing PCV valve or oil separator be the culprit, and is it a DIY fix, or should I take it to a specialist?

Any insights or similar experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:57 AM

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ClearTheCode admin answer:

Your observation about oil consumption and the potential link to the PCV system on your 2016 Volvo XC60 T5 (Drive-E engine) is astute. This is indeed a known, though not universal, issue for some of Volvo's earlier Drive-E engines.

Causes of Oil Consumption:

  1. PCV System Issues: The PCV (Positive Crankcase Ventilation) system, which includes the oil separator (often integrated into the valve cover on these engines), is designed to vent crankcase gases while separating oil vapor. If the PCV diaphragm ruptures or the system becomes clogged, it can lead to excessive crankcase vacuum or pressure, drawing oil into the intake manifold or forcing it past seals, resulting in increased oil consumption.
  2. Piston Ring Issues: In some cases, particularly with earlier iterations of these engines, the design of the piston rings or their oil control properties can contribute to oil consumption. This is a more severe and costly issue.
  3. Turbocharger Seals: A failing turbocharger seal can also allow oil to enter the exhaust or intake, leading to consumption.

Symptoms of PCV Failure:

  • Increased oil consumption without visible leaks.
  • Whistling noise from the engine bay (indicating a ruptured PCV diaphragm).
  • Rough idle or engine performance issues.
  • Diagnostic Trouble Codes (DTCs) related to lean running conditions, misfires, or boost pressure issues, such as P0171 (System Too Lean Bank 1), or P050A (Cold Start Idle Air Control System Performance), though direct PCV codes are less common for just oil consumption.

Diagnosis & Action:

  1. Visual Inspection: Carefully inspect the engine bay for any signs of oil leaks around the valve cover, oil pan, or turbocharger.
  2. PCV Test: A common test for a ruptured PCV diaphragm is the 'glove test.' With the engine idling, place a latex glove over the oil fill cap opening. If the glove is strongly sucked inwards, it suggests a ruptured PCV diaphragm causing excessive vacuum.
  3. Check for Whistling: Listen for a distinct whistling sound coming from the engine, especially at idle.

DIY vs. Professional:

  • PCV System Replacement: On your Drive-E engine, the PCV system is typically integrated into the valve cover. Replacing the entire valve cover is often the recommended fix for a failed PCV diaphragm. This can be a moderate to advanced DIY task, requiring careful removal of components, proper torque settings, and attention to seal integrity. It's not a simple 'valve' to swap out.
  • Oil Consumption Monitoring: Continue to monitor your oil consumption closely. Keep a log of when you add oil and how much.

When to See a Shop:

  • If you're uncomfortable performing the valve cover replacement yourself.
  • If the PCV test is inconclusive, or you suspect piston ring or turbocharger issues.
  • For a professional diagnosis using specialized tools and knowledge of Volvo's specific service bulletins related to oil consumption.
  • If you have any engine warning lights or performance issues. Addressing PCV issues promptly can prevent more serious engine damage down the line.
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