Problem explainer

HEMI Tick in a Ram 2500/3500: Lifter Failure or Exhaust Manifold Bolts?

Published September 24, 2026 · Updated October 10, 2026 · 16 min read

A ticking HEMI in a Ram 2500 or 3500 is usually one of two things, and they sit at opposite ends of the bill. A broken exhaust manifold bolt is an exhaust leak; one owner was quoted $610 for the repair in 2021. A failed lifter can take the camshaft with it; another owner was quoted $8,500 for a rebuilt engine in 2024.

This guide shows you how to tell the two apart by ear and with a scan tool, what Ram itself has told its technicians, and what each repair costs. It is built from NHTSA owner complaints on Ram HD gas trucks, Ram's service notes in NHTSA's records and current part prices, and it says where that evidence is thin.

The one idea: when the tick goes away tells you where it comes from

The 6.4 and 5.7 HEMI bolt cast-iron exhaust manifolds to aluminum cylinder heads. The two metals grow at different rates every time the engine heats up and cools down, and over thousands of cycles the manifold bolts break and the manifolds can warp. aggregated When a bolt breaks, a gap opens at the flange. On a cold engine that gap leaks exhaust in pulses, and you hear a tick. As the manifold heats up and expands, the gap closes and the tick fades.

A lifter is different. It rides on the camshaft at every engine speed and every temperature. When its roller wears or seizes, it chews the cam lobe under it, and the noise does not care whether the engine is warm. aggregated

One owner of a 2014 Ram 2500 described the manifold pattern exactly:

"After a few minutes the leak will stop. You shut off the truck even for a few minutes then start it again the leak comes back."

Owner of a 2014 Ram 2500, 2021. The dealer quoted $610. NHTSA complaint 11399782

What Ram HD gas-engine owners report to NHTSA

Lifter and camshaft failures lead the engine-noise complaints on these trucks: 17 complaints name them, against 6 for the exhaust manifold. That is the opposite of the usual internet answer, which treats the HEMI tick as a manifold problem first. Owner forums are full of manifold bolt stories, and those are real, but owners rarely file a federal safety complaint about an exhaust leak. A lifter failure that shuts down a cylinder at highway speed is the kind of event people report.

Two more patterns stand out. All 17 lifter complaints were filed in 2019 or later. And five of them say the noise came back after a lifter repair, including one owner who wrote that it was back within 20 miles of picking up the truck.

A note on how we counted: Ram sells the same 2500 and 3500 trucks with the 6.7 Cummins diesel under the same model names. We kept only complaints that name the gas engine or describe an engine noise, misfire or manifold leak, and removed every complaint that names anything diesel. That leaves a small set, so read the counts as direction, not as rates.

6.4 HEMI ticking noise by model year

Short answer: the tick is not limited to one year. Lifter and cam complaints are split almost evenly between 2014-2018 trucks (8) and 2019-2024 trucks (9), and Ram's service note on cam and lifter wear lists Ram 2500 and 3500 trucks through the 2021 model year. Manifold complaints cluster on 2014-2016 trucks.

Complaints: NHTSA owner complaints on 2014-2025 Ram 2500, 3500, 4500 and 5500 trucks, pulled 2026-09-12 and 2026-10-10, limited to complaints that name the gas engine or describe an engine noise, misfire or manifold leak, with every complaint that names the diesel removed. Raw counts, not adjusted for how many gas trucks were sold. Most owners of 2014-2018 trucks do not say which gas engine they have.

From 2014 through 2018 the Ram 2500 and 3500 were sold with either the 5.7 or the 6.4 HEMI; from 2019 the 6.4 was the only gas engine. verified Most owners of the older trucks do not say which engine they have, and both engines share the manifold design and the lifter type, so this guide applies to both.

The newest trucks are not immune. Owners reported lifter failures at 10,500 miles on a 2024 Ram 2500, at about 17,000 miles on a 2022 and at 30,000 miles on a 2021.

Step 1: listen to it cold, then hot

What to do. Let the truck sit for several hours, ideally overnight. Open the hood, start it and listen near each manifold, low on the sides of the engine. Then drive it for 15 to 20 minutes until it is fully warm, and listen again at idle and with a helper raising the engine speed.

What you will hear.

Why. The manifold leak seals itself as the iron expands. A lifter has no reason to quiet down with heat; a collapsed or seized one usually gets louder as oil thins.

Be careful with the word "normal." At least two owners were told by a dealer that their tick was normal, one of them after a lifter and camshaft repair that had not stopped the noise. Ram does call one thing normal: a deactivating (MDS) lifter whose internal locking pin is not lined up is not a defect, and Ram told technicians in 2023 not to replace a lifter for that alone (note 9100229). verified That is a statement about one inspection finding, not about engine noise.

Step 2: scan it for misfire codes

What to do. Plug in any OBD-II scan tool and read stored and pending codes. A flashing check-engine light means an active misfire: stop driving and get it looked at.

What you will see. A manifold leak usually sets no code at all. A failing lifter often sets a misfire code for one cylinder, P0301 through P0308, before or along with the noise, because the valve it opens no longer opens fully. verified Ram's own service note on these engines lists the symptoms as "abnormal engine noise, rough idle, lack of power, misfire."

"My truck had a P0302 cylinder 2 misfire code, dealership 'reset' the vehicle and code didn't return. 3 weeks ago, cylinder 2 started having a loud tapping noise after the vehicle was fully warmed up."

Owner of a 2021 Ram 2500 at about 23,000 miles, 2024. NHTSA complaint 11572681

That is the pattern to take seriously: a misfire code on one cylinder that someone cleared, then a tick from the same cylinder when the engine is hot. Do not let a shop replace plugs and coils and call it fixed without checking the valvetrain on that cylinder. One 2014 owner changed the plugs on a cylinder 3 misfire; the code came back, and the dealer found a dropped valve seat and a cam and lifters that needed replacing.

Ram also issued a 2021 note on code P1524 (oil pressure out of range, cam timing disabled) for 2016-2021 Ram 3500 and 2018-2021 Ram 2500 trucks. If you see P1524, check the oil level and pressure before anything else. verified

Step 3: look at the manifolds

What to do. With the engine cold, look along both exhaust manifolds where they meet the cylinder heads. A flashlight and a mirror help on the rear bolts. On 4x4 trucks the rear of the manifolds is hard to see from above.

What you will see. A bolt with a missing head or a gap between the manifold flange and the head, black soot streaks at the flange, or a manifold that sits visibly away from the head at one end. An exhaust smell in the cab, especially with the heater on, is another sign: four of the six manifold complaints describe exhaust or fumes inside the cab. verified

What it costs. OEM manifold bolts list for about $15 each and are single-use. Manifold gaskets list for about $28 (2019-2021) to $134 (2022 and later). If the manifold itself is cracked or warped, a replacement lists for about $236 to $545 per side depending on year and side. Broken bolts often have to be drilled out of the head, which is where most of the labor goes; we do not have reliable labor figures. One 2015 owner reported in 2025 that the manifold for their truck was no longer available from Mopar, so check parts availability before the truck is taken apart.

Is there a bulletin? Not for the Ram 2500 and 3500 in the NHTSA records we checked. Ram's bulletin 09-011-22 on a cold ticking noise from the exhaust manifolds, which replaces the manifolds, lists 2019-2021 Ram 1500 trucks only. verified

Step 4: if it points to a lifter, what happens next

What it is. The HEMI uses hydraulic roller lifters. Each one has a small roller on a needle bearing that follows the cam. When the needles fail, the roller skids or locks, flattens itself and grinds the cam lobe it rides on. aggregated Ram's technical note S1709000010 describes "excessive camshaft lobe wear/lifter wear (roller failure) on one or more cam lobes" and says "camshaft/lifter replacement is necessary." The note covers HEMI engines across Chrysler, Dodge, Jeep and Ram vehicles and lists Ram 2500 and 3500 trucks through the 2021 model year. verified It is a service note to technicians, not a recall or a warranty extension.

The cylinder-deactivation lifters. The HD 6.4 has cylinder deactivation (MDS), so some cylinders use deactivating lifters and the rest use standard ones. They are different parts and must go back in the right positions. aggregated

"Cam shaft lobe rounded off, causing sudden loss of power and misfire on cylinder 7."

Owner of a 2017 Ram 2500, 2024. The truck shook violently at highway speed; the shop estimated $8,500 for a rebuilt engine. NHTSA complaint 11608213

What the repair includes. On a confirmed lifter failure, the cam lobe under it is usually damaged too, so the job becomes lifters plus camshaft, often with pushrods and rocker arms, and an oil flush to clear the metal. OEM lifters list for about $72 (standard) and $161 (deactivating) each and pushrods for about $21; the camshaft and rocker arms come on top. We do not have a reliable labor figure. When metal has gone through the engine, owners report a replacement or rebuilt engine instead: $8,500 estimated in 2024, and about $8,000 named by a dealer in 2017 for a 2014 truck whose engine began to knock.

When the repair does not hold. Five owners told NHTSA the noise came back after a lifter repair. One 2022 owner said all 16 lifters were replaced, then a stuck exhaust lifter on cylinder 2 meant a second round with a new camshaft, and the engine still was not quiet:

"Engine still has a very loud clatter and ticking noise. Did not do this when it was brand new."

Owner of a 2022 Ram 2500, 2025. NHTSA complaint 11672856

If yours is repaired, ask for the parts list on the invoice (which lifters, whether the camshaft was replaced) and keep it. A repeat failure under warranty is easier to argue with paperwork.

Can you drive a Ram with a HEMI tick?

Short answer: with a cold-only tick that fades in minutes and no codes, yes, but fix it before more bolts break and watch for exhaust smell in the cab. With a tick that stays hot, a misfire code or a flashing check-engine light, no: drive it only as far as a shop. Owners reported sudden loss of power and a shaking truck at highway speed when a cam lobe let go.

Exhaust in the cab is a safety problem on its own. If you smell it, keep windows open and get the leak fixed.

What you found, and what to do about it

Part prices are OEM list prices at the time of publication; the aftermarket is often cheaper. Owner-reported costs come from NHTSA complaints and show what those owners paid or were quoted in those years, not a quote. We do not have reliable labor estimates for these jobs.

Before you buy a used Ram 2500 or 3500 with the HEMI

• Ask for a cold start. Arrange to see the truck before it has been driven that day. A seller who warms it up first may be hiding a manifold tick, or a lifter.
• Listen again hot, after a real drive, at idle and with the engine revved.
• Scan for codes, including pending ones, and ask whether any misfire codes were cleared recently.
• Look at both manifolds for broken bolt heads and soot.
• Ask for service records: oil changes on time, and any lifter, camshaft or manifold work with invoices.
• Run the VIN through NHTSA's recall lookup. There is no recall for the lifters or the manifold bolts on these trucks, but other recalls may be open.

What we cannot tell you

• How often the HEMI lifters fail. Seventeen complaints are a signal, not a rate, and we have no sales figures for gas Ram HD trucks to compare against.
• Whether newer trucks are better or worse. Lifter complaints are split almost evenly between 2014-2018 and 2019-2024 trucks, and all were filed from 2019 on, so the counts may reflect when owners started hearing about the problem as much as when it started.
• Which engine the older complaints are about. Most owners of 2014-2018 trucks do not say whether they have the 5.7 or the 6.4.
• Why some lifter repairs do not hold. Owners report it; the complaints do not say what was installed or why the noise returned.
• Whether Ram will cover it. Ram's note S1709000010 is guidance to technicians, not a warranty extension. We found no lifter warranty extension for these trucks in NHTSA's records.
• Labor costs. We quote part list prices and what owners reported, not shop rates.

FAQ

Go deeper

Each of these pages shows the sources behind every claim, the confidence tier and the part numbers:

• Ram 6.4 HEMI platform page · the diesel in the same trucks: 6.7 Cummins 2019+
• Failure modes: Lifter and cam wear · Exhaust manifold bolts · Ignition service
• Repairs: Lifter and valvetrain repair · Exhaust manifold repair
• Parts: Standard lifter · Deactivating (MDS) lifter · Manifold bolt · Manifold gasket
• How we verify and tag facts

Sources. NHTSA owner complaints database (US government public domain), keyword-matched, read by hand and limited to complaints that do not name the diesel; owner quotes are taken from complaint narratives with capitalization normalized, and complaint numbers are given so you can read them in full. Ram technical notes S1709000010, 9100229 and S2109000001 and Ram bulletin 09-011-22, from NHTSA's manufacturer communications index. Engine availability by model year from the platform record. Part prices are OEM list prices at the time of publication. Torque Index aggregates and cross-checks public information, takes no paid placement and does not provide repair or inspection services.