- Incorrect Oil Viscosity: If the oil used isn't the recommended 0W-20 grade, it could lead to inadequate lubrication or pressure in the engine, causing ticking sounds. This is especially true for engines with hydraulic lifters.
- Dry Start: The engine might have been started without oil momentarily, leading to temporary noise until lubrication was restored.
- Oil Filter Issues: The brand and type of oil filter used can impact engine noise. Some filters, especially low-quality ones, might not maintain proper oil pressure, causing the lifters to make noise.
- Damaged Components: Physical damage to parts under the oil cap, such as the baffles, during the oil change could create a ticking sound. This can happen if the equipment used during the oil change process inadvertently bends or damages internal parts.
- Other Factors: Less common issues might include leaks in the manifold or the presence of debris or old gunk loosened by the fresh oil, which might affect the valve train.
- Check the Oil Grade: Ensure the correct oil grade (0W-20) was used.
- Inspect for Physical Damage: Look under the oil cap for any signs of physical damage or misalignment.
- Oil Filter Quality: Verify the quality and type of oil filter installed.
- Professional Inspection: If you're unsure or the noise persists, a professional inspection is recommended.
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