CDJR of Clifton Park · Ram 1500
Why Does My Hemi Tick? A Straight Answer
A ticking noise from a 5.7L or 6.4L Hemi is common enough that it's worth understanding before you assume the worst. Here's what's usually behind it, and how to tell whether it's a quick fix or worth a closer look.
What is "Hemi tick"?
"Hemi tick" is a nickname for a light ticking or clicking sound coming from the engine bay on 5.7L and 6.4L Hemi V8s, most noticeable on a cold start or at idle. It's a widely discussed characteristic of these engines, and in most cases traces back to one of two very different sources — one minor, one worth having a technician look at.
The two most common sources
Exhaust manifold bolts
By far the more common cause. The exhaust manifold bolts can loosen slightly over time, letting a small amount of exhaust leak past the gasket surface — that's the ticking you hear, usually loudest right after starting the engine cold.
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Lifter or valvetrain noise
Less common, but more worth attention. A ticking that continues steadily at idle and doesn't fade as the engine warms up can point to a lifter or valvetrain component rather than the exhaust system.
Is it something to worry about?
An exhaust manifold bolt tick is a common, well-known Hemi quirk and typically doesn't get worse quickly, though it's still worth tightening or resealing so it doesn't lead to a bigger exhaust leak down the road. A lifter or valvetrain tick is the one to take more seriously, since ignoring true valvetrain noise can lead to bigger repairs later. The only reliable way to tell which one you have is to have a technician listen to it directly and, if needed, pull codes and inspect the manifold bolts. If you're weighing Ram engine options more broadly, our Ram Hurricane vs. Hemi engine guide breaks down how the two compare.
CDJR of Clifton Park's factory-trained technicians work on the Ram 1500 and its Hemi engines regularly, so a diagnostic visit is quick to book and gets you a real answer instead of a guess.
Get it checked before it becomes a bigger repair
A quick diagnostic visit will confirm whether it's a simple manifold bolt fix or something in the valvetrain worth addressing sooner.
Frequently Asked Questions
Is Hemi tick bad for my engine?
If it's coming from loose exhaust manifold bolts, it's a common, manageable issue rather than a sign of engine damage. If it's valvetrain noise, it's worth addressing sooner rather than letting it continue.
Does Hemi tick happen on all Hemi engines?
It's most commonly discussed on 5.7L and 6.4L Hemi V8s. Not every engine develops it, and it isn't a sign of a specific model year defect.
How can I tell if it's exhaust bolts or a lifter?
Exhaust bolt tick is usually loudest cold and fades as the engine warms up. A steady tick that continues at idle after warm-up is more likely valvetrain-related. A technician can confirm which one you're hearing.
Can I keep driving with a ticking Hemi?
An exhaust bolt tick generally isn't urgent, but it's still worth getting checked so it doesn't turn into a larger exhaust leak. If you suspect valvetrain noise, get it looked at promptly.