Chrysler 5.7L 345 HEMI Engine Specs, Problems & Reliability

Chrysler 5.7L 345 HEMI Engine

Here in this post, I have gathered information about the Chrysler 5.7L 345 HEMI Engine from its official website, including its specifications, Problems, and Reliability.

We believe in providing reliable information to our readers, therefore we prefer to obtain information on the Chrysler 5.7L 345 HEMI Engine from authentic sources.

This article, which has been updated, has all the information you require about the Chrysler 5.7L 345 HEMI Engine.

Chrysler 5.7L 345 HEMI Engine

Chrysler’s Hemi engine family entered its third iteration in 2003. The 2003 Dodge Ram pickup trucks were the first to receive the 345 cu in. (5.7-litre) V8 gasoline Hemi.

The 5.9-litre V8 LA/Magnum engine was replaced with the 5.7-litre Hemi (project code name: Eagle).

In the subsequent years, the 345 Hemi engine became an option in a wide range of Chrysler vehicles, including the Dodge Durango, Chrysler 300C, Dodge Magnum R/T, Jeep Grand Cherokee, Dodge Charger, and many more.

Let’s go deep into the design, typical issues, reliability, and longevity of the 5.7 Hemi engine.

Firing order1-8-4-3-6-5-7-2
Engine oil weightSAE 5W-20
Engine oil capacity, litre
6.7 l (7.0 qt) with oil filter
Oil change interval, mile6,000 (10,000 km)/6 months
ApplicationsRam 1500/2500/3500, Dodge Durango, Chrysler 300 300C, Dodge Magnum (R/T), Dodge Charger (R/T), Jeep Grand Cherokee, Jeep Commander, Chrysler Aspen, Dodge Challenger
Chrysler, Saltillo Engine plant in Ramos Arizpe, Mexico
Production years2003-present
Cylinder block material
Cast iron
Cylinder head material
Fuel typeGasoline
Fuel systemSequential multi-port fuel injection
Number of cylinders8
Valves per cylinder2
Valvetrain layout
Bore, mm99.49 mm (3.92 in)
Stroke, mm90.88 mm (3.58 in)
Displacement, cc5,654 cc (345 cu in)
Type of internal combustion engine
Four-stroke, naturally aspirated
Compression Ratio
10.5:1 – 2009+ model years
Power, hp
340-395 hp (254-295 kW)/5,000-5,600
Torque, lb-ft
375-410 ft-lb (508-556 Nm)/3,950-4,400
Engine weight
560 lbs (254 kg)

Chrysler 5.7L 345 HEMI Engine Problems & Reliability

The 5.7-liter Hemi in the Chrysler needs some praise, so let’s give it some.

The 5.7 Hemi V8 is a good, reliable, and solid engine, and the third-generation Hemi V8s as a whole has no major design problems.

If it wasn’t, Chrysler wouldn’t have used it in some of their most prestigious vehicles for nearly two decades. However, in the actual world, there is no such thing as a flawless engine.

The most frequent 5.7 Hemi troubles are listed here.

Valve springs dropping or cracking was a known issue with early Hemi engines. When Chrysler noticed this issue in 2007, they promptly fixed it by upgrading the springs. At present, several drivers have reported hearing a peculiar ticking noise from the valvetrain of their 5.7L Hemi engine.

The tick is a common symptom of the MDS system on Hemi V8s manufactured in 2009 and later. The silent ticking, however, is perfectly normal and has no bearing on anything.

When the sound grows increasingly clear and takes on metallic overtones, that’s when you should be concerned. Possible causes include broken lifters or frozen lifter rollers.

Ticking is just one symptom of this condition, which may also include a misfire and the illumination of the “check engine” light. If you let this go on for too long, you’ll wind up with metal shavings in the oil and a ruined camshaft.

The sensitivity of the cylinder deactivation system (MDS) to oil conditions should also be mentioned. At the right times, the oil should be changed, and only the right kind of oil should be used.

How Long Do 5.7 HEMI Spark Plugs Last?

In the long run, original equipment manufacturer spark plugs fail to deliver. When driving a Chrysler 5.7 Hemi, you should get them replaced every 30,000 to 40,000 miles.

Due to the use of two spark plugs per cylinder, misfires in Hemi V8s may be difficult to diagnose and fix. More labour is required to keep it running, and a set of 16 spark plugs for a modern engine doesn’t come cheap.

The bolts on the exhaust manifold aren’t quite up to snuff.

Broken exhaust manifold bolts are the most typical 5.7L HEMI issue. As reported by several proprietors, this problem has surfaced more than once for them.

Often, the bolt on the manifold serving the back passengers will give way first. The fact that it is the hottest component of the engine has been proposed as a possible explanation.

Warping and twisting of the exhaust manifold and a loosening of the fasteners are common problems.

Chrysler 5.7L 345 HEMI Engine Review 

Since its introduction in 2003, the Chrysler 5.7L HEMI engine has been widely used in many vehicles. It is known as a powerful engine with high torque and durability. For a full review, please check this YouTube video Here.

Chrysler 5.7L 345 HEMI Engine FAQ

How much HP does a 345 Hemi have?

Get your hands on the same storied 345 HEMI® motor used in the current-generation Dodge Challenger. Included are a whopping 383 horsepower and 417 lb-ft of torque.

Is a 5.7 liter Hemi a 345?

The 5.7-liter Hemi V-8 produces 345 horsepower, which is 100 more than the 5.9-litre Magnum V-8 produces.

When paired with a new automatic transmission, it is thought to get about 10% better gas mileage. It also has more torque and weighs about 60 pounds less.

What engine is a 345 Hemi?

The 5.7-litre, 345-CID HEMI V8 is the first engine designed by HEMI to be put into production in 30 years.

Initially introduced in the 2002 Dodge Ram 2500 and 3500 vehicles, As time went on, it found its way into various rear-wheel-drive Chryslers, Dodges, and Jeeps, including the 300C, Charger, Challenger, Magnum, Grand Cherokee, and Commander.

Is the 345 Hemi a small block?

The first generation of the third-generation Mopar Hemi engine debuted in 2003 Dodge Ram pickups, and it had a displacement of 5.7 litres (345 cubic inches).

The 5.7L Generation still falls under the category of small-block engines due to their displacement.

Is the 5.7 Hemi good for towing?

But what is the RAM 1500’s towing capacity? The 2022 RAM’s towing capability is engine-dependent; the 5.7L HEMI® V8 allows for a maximum haul of 12,750 pounds.

There are five different engines to choose from, each with its own set of pros and cons in terms of fuel economy and top speed.

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