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Loud Hemi Tick on my 2017 Charger R/T - What's going on?

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Chris P. · rep 0 · May 25, 4:15 AM · 1 replies · solved · Question

Vehicle: 2017 Dodge Charger R/T

Hey everyone,

I've got a 2017 Dodge Charger R/T with the 5.7L HEMI, and lately, I've noticed a pretty distinct ticking noise coming from the engine. It's most noticeable when the engine is cold, but I can still hear it faintly once it warms up, especially under light acceleration.

It sounds like it's coming from the top end of the engine. I'm worried it might be the dreaded 'Hemi tick'. I keep up with my oil changes using the recommended synthetic oil. Is this something I should be seriously concerned about, or is it just a characteristic of these engines?

Any advice or shared experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:15 AM

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ClearTheCode admin answer:

The 'Hemi Tick' is a well-known issue with the 5.7L and 6.4L HEMI engines, often pointing to potential valvetrain problems. Here's what you should know and do:

  1. Identify the Source: Use a mechanic's stethoscope or a long screwdriver (carefully!) to pinpoint the exact location of the ticking. Listen around the valve covers on both sides of the engine.
  2. Common Causes:
    • Collapsed Lifters/Worn Camshaft Lobes: This is the most common and serious cause. Lifters can fail, leading to accelerated wear on the camshaft. This often happens due to oil starvation, incorrect oil viscosity, or extended oil change intervals.
    • Exhaust Leaks: Sometimes a small exhaust leak, especially near the manifold, can sound like a ticking engine. Check for black sooty spots around exhaust manifold bolts.
    • PCV Valve: A faulty PCV valve can sometimes create a ticking sound, though it's less common to be mistaken for a lifter tick.
    • Fuel Injectors: Injectors naturally make a clicking sound, but if one becomes excessively loud, it could indicate an issue.
  3. Check Oil: Ensure your oil level is correct and that you're using the manufacturer-recommended oil weight and type (usually 5W-20 synthetic for the 5.7L HEMI). Dirty or low oil can exacerbate these issues.
  4. Diagnostics: While there isn't typically an OBD-II code for a 'Hemi tick' specifically, a severe misfire caused by a failed lifter might trigger P030x (Misfire Cylinder x) codes. A compression test or cylinder leak-down test can help diagnose internal engine issues.

When to see a shop:

  • Immediately if the ticking is very loud, accompanied by a misfire (rough idle, loss of power), or if your check engine light comes on with misfire codes. Continued driving with a failed lifter can cause significant damage to the camshaft and potentially other engine components.
  • If you cannot pinpoint the source yourself or are unsure about the severity.
  • A qualified mechanic can perform a comprehensive diagnosis, which may involve removing valve covers to inspect lifters and camshaft lobes directly.
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