Does your 2025 RAM 1500 make noise after shutdown? If you've recently purchased a 2025 RAM 1500 with the new 3.0L Hurricane twin turbo inline 6 cylinder engine, you might notice a quiet whirring or accessory running humming noise coming from the engine bay that lasts for several minutes, shortly after parking and turning the truck off. Don't worry, this is completely normal.
Does your Ram 1500 Make Noise When Shut Off?
If you’ve ever walked away from your 2025 RAM 1500 with the 3.0L SST engine and noticed a faint humming or whirring sound coming from under the hood, you're not alone. This can seem strange at first, especially if you're new to turbocharged engines or modern cooling systems. But rest assured — this post shutdown behavior is intentional and important. The electric pump continues circulating coolant after shutdown to prevent turbo oil coking and engine heat soak, both of which can damage components over time.
It’s the Secondary Cooling System
The 3.0 SST Hurricane engine features a secondary electric cooling system designed to protect its high-performance twin turbo components. After engine shutdown, this system continues to circulate coolant through the turbos and engine block to prevent heat soak and reduce long-term wear.
This system operates using an electric water pump that can run for several minutes after the ignition is turned off. It's common to hear:
- A quiet electric motor sound
- Coolant flowing or gurgling noises
- A soft hum from under the hood
This cooling behavior is more noticeable in warm conditions or after hard driving, when turbocharger temperatures are high.
Why This Cooling Process Matters
The Hurricane twin turbo I6 engine runs at high temperatures — especially around the turbochargers. When a hot engine is shut off, oil trapped in the turbo can "cook" into carbon deposits, a process called oil coking. This buildup can clog oil passages and reduce turbo life. By continuing to circulate coolant after shutdown, a secondary electric cooling pump system cools the turbo housings and prevents this thermal damage.
This also helps with engine heat soak, where heat from hot components spreads into nearby sensors and parts. Managing these temps ensures longer engine life and better reliability under repeated hot starts or towing conditions.
📹 What It Sounds Like
Here's a short video of my 2025 RAM 1500 making noise after shutdown, where you can clearly hear the secondary cooling pump running:
🛠️ Should You Be Concerned?
In short, no. The RAM 1500 humming sound or post shutdown cooling system noise is a sign that coolant is flowing and your truck is working as intended. However, if the pump continues to run for more than 10–15 minutes or you notice battery drain or warning lights, it's worth having a dealer check the system for faults.
Summarizing the 3.0 Hurricane Engine Cooling System Noise
In summary, the Inline 6 Cylinder 3.0L Hurricane engine was engineered and designed with both high performance and durability in mind. The secondary cooling system plays a key role in maintaining turbo efficiency and engine health — even when the engine is off. So the next time you hear that gentle pump or fan like hum after parking, know it's just your RAM looking after itself.
Have questions or want to share your own experience? Drop me an email message.
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