That's the famous HEMI tick: an MDS lifter roller seizing and skidding across a camshaft lobe. We replace the lifters and cam in your driveway — caught early, this stays a repair instead of becoming an engine replacement.
The 5.7 HEMI uses Multi-Displacement System (MDS) lifters to shut down four cylinders while you cruise — good for fuel economy on the 401, hard on the lifters themselves. Each MDS lifter rides the camshaft on a small needle-bearing roller. When that roller's bearings wear out, the roller stops spinning and seizes. Instead of rolling smoothly over the cam lobe thousands of times a minute, it skids across it like a locked tire on asphalt — and starts machining the lobe flat.
That's the tick you hear at idle. It quiets down at higher RPM because oil flow and valvetrain loading change, which fools a lot of owners into thinking it's harmless. It isn't. As the lobe wears, that cylinder loses valve lift, the engine starts misfiring — P0300-series codes pointing at one cylinder — and you'll often see the oil pressure dip on deceleration. Meanwhile, every minute of skidding sends fine metal debris through the oiling system.
Caught early, the fix is lifters, a new camshaft, and a pan-drop flush to clear the debris out of the bottom end. Caught late, that metal ends up in the rod and main bearings and the same truck needs a complete engine. The difference between those two outcomes is usually a few weeks of 'I'll get the tick looked at eventually.'
If your Ram / Jeep is doing any of these, this is the likely cause:
Every kilometre on a seized lifter grinds more metal off the cam lobe and pushes more debris through the oil. The repair bill doesn't grow gradually — it jumps. Lifters and a cam is one job; once the debris reaches the rod and main bearings, the only honest fix is a complete engine. If the tick is there at warm idle, the clock is already running.
Yes. On the 5.7 the cam comes out the front of the engine — it needs front-end disassembly and patience, not a hoist. We bring everything, the truck stays on your property the whole time, and you get the same factory procedure a shop performs, minus the shuttle rides and the days in their queue.
It's a long labour job at dealership hourly rates, with OEM-only parts pricing on top — and some service departments skip the nuance entirely and quote a complete engine because it's simpler for them. We diagnose first, confirm it's lifter failure and not something cheaper like an exhaust manifold leak, then give you one flat quote for the complete job — lifters, cam, flush, everything — before any work starts.
No, and you shouldn't want to. If one roller seized, the cam lobe under it is damaged — and the other lifters have the same mileage and the same failure mode. Partial repairs on this engine come back within months. The complete job is the one that lasts.
Both are common on these trucks and both tick. A manifold leak is loudest on cold start and fades as the metal expands; lifter tick stays or worsens once warm and usually brings misfire codes with it. We verify which one you have before quoting — they're very different repairs and you shouldn't pay for the wrong one.
Send it over for a free second opinion. I'll tell you straight what the job actually involves — and if their quote is fair, I'll tell you that too.
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