Ticking Noise from Engine - 2020 Ram 1500 (Exhaust Manifold?)

ClearTheCode admin answer:

The ticking noise you're describing in your 2020 Ram 1500 Laramie with the 5.7L Hemi engine is indeed a very common complaint, and it's frequently attributed to a leaking exhaust manifold. Here's a breakdown:

1. Common Cause: The primary cause is often due to exhaust manifold bolts breaking or stretching, particularly on the passenger side. This allows exhaust gases to escape, creating the ticking sound, especially when the engine is cold and the metal components are contracted. As the engine heats up and expands, the gap can temporarily close, reducing the noise.
2. Diagnosis: A mechanic will typically inspect the exhaust manifolds for signs of black soot around the gaskets or broken/missing studs. They might also use a stethoscope to pinpoint the source of the sound. While there isn't a specific OBD-II code for an exhaust manifold leak itself, a severe leak can sometimes trigger oxygen sensor codes (P0171/P0174 for a lean condition) if it impacts exhaust gas readings.
3. Repair: The repair involves replacing the exhaust manifold gasket and often the manifold itself if it's warped. Crucially, all broken or seized manifold studs need to be extracted and replaced, which can be a time-consuming and labor-intensive process.
4. Parts & Tools: Ensure high-quality replacement gaskets and studs are used. Some aftermarket solutions offer stronger studs to prevent future issues.

When to see a shop: It's advisable to get this checked soon. While not immediately catastrophic, a persistent exhaust leak can affect engine performance, fuel economy, and potentially lead to exhaust fumes entering the cabin. A qualified technician can accurately diagnose and repair the issue.