2017 Durango R/T Hemi Ticking Noise and Oil Consumption

ClearTheCode admin answer:

The ticking noise and increased oil consumption in your 2017 Dodge Durango R/T with the 5.7L Hemi engine are indeed common concerns for this powertrain, often pointing towards specific issues. You're right to be concerned about the 'Hemi tick' and potential lifter problems.

Common Causes:

1. MDS Lifter Failure (Hemi Tick): This is a very common cause. The Multi-Displacement System (MDS) lifters, which deactivate cylinders for fuel economy, are prone to failure. When a lifter fails, it can cause a distinct ticking noise, especially when cold, and can lead to camshaft lobe wear. This can also indirectly lead to increased oil consumption if the valve train isn't operating optimally.
2. Exhaust Manifold Leaks: A cracked exhaust manifold or a leaking manifold gasket can produce a ticking sound that is often mistaken for an internal engine tick. This sound is usually more prominent when cold and can sometimes lessen as the engine heats up and the metal expands.
3. PCV System Issues: A faulty Positive Crankcase Ventilation (PCV) valve or clogged PCV system can lead to increased crankcase pressure, which can force oil past piston rings or valve seals, resulting in higher oil consumption.
4. Valve Stem Seals: Worn valve stem seals can allow oil to seep into the combustion chambers, leading to oil consumption and sometimes a blueish smoke from the exhaust, especially on startup.

Diagnostics & Next Steps:

1. Listen Carefully: Try to pinpoint the location of the tick. Is it coming from the top of the engine (valve train) or lower down/sides (exhaust manifold)? Use a mechanic's stethoscope if available.
2. Check Oil Level Regularly: Continue to monitor your oil consumption closely. Keep detailed records of when you add oil and how much.
3. Inspect for Exhaust Leaks: Look for black sooty stains around the exhaust manifold gaskets and bolts, which indicate a leak.
4. Scan for Codes: While a ticking noise itself might not trigger a check engine light, a failing MDS lifter can sometimes lead to misfire codes (P030x) or camshaft position sensor codes (P0340, P0345) if the camshaft is damaged.

When to See a Shop:

• Immediately: If the ticking becomes very loud, changes to a knocking sound, or if you notice a significant loss of power or a flashing check engine light. This could indicate severe engine damage.
• Soon: If you suspect MDS lifter failure or an exhaust manifold leak. Addressing these issues early can prevent more extensive and costly repairs, such as camshaft replacement. A qualified technician can perform a proper diagnosis, which may include using specialized listening tools, compression tests, or even removing valve covers for visual inspection.