2002 Dodge Ram 1500 5.9 Engine for Sale | Mopar Magnum V8 (360 cu in)

About This Engine

The 5.9 Magnum is the V8 that built the second-generation Dodge Ram’s reputation. From 1994 through 2003, this engine powered the half-ton, three-quarter-ton, and one-ton Ram pickups, the Durango full-size SUV, and the Dakota R/T performance truck. Producing 245 hp and 335 lb-ft of torque from 360 cubic inches, it delivered the V8 grunt that made the Ram a serious work truck and a credible alternative to Ford and Chevy half-tons of the same era.

Internally, the 5.9 Magnum is the modernized version of Chrysler’s LA-series small block V8 that traces back to 1964. The Magnum upgrades over the older 360 LA include redesigned cylinder heads with significantly improved port flow, sequential multi-point fuel injection (SMPI) replacing the carburetor, a hydraulic roller camshaft for better high-RPM breathing and lower friction, and a one-piece rear main seal that eliminates the chronic leak point of older LA engines.

Why Ram Owners Choose a Used 5.9 Magnum Over a Reman

Used 5.9 Magnum availability is excellent because over a million were built between 1994 and 2003. A clean used unit from a low-mileage donor truck typically costs less than half of a remanufactured long block, while delivering comparable service life when properly inspected and tested. For Ram owners doing a budget-conscious engine replacement, a verified used 5.9 is the smart choice.

Signs You Need a Replacement 5.9 Magnum

• Knock or rattle under load, rod or main bearing wear on high-mileage units
• Blue smoke on startup, valve seal wear (a known 5.9 Magnum issue past 150,000 miles)
• Loss of compression on one or more cylinders, head gasket or ring wear
• Coolant in oil or oil in coolant, head gasket or intake manifold gasket failure
• Excessive timing chain noise on cold start, timing chain stretch
• Low oil pressure on a warm engine, main or cam bearing wear
• Misfire codes that move between cylinders, intake manifold plenum gasket leak (known issue)

Known 5.9 Magnum Issues We Inspect Before Shipping

• Plenum gasket condition, the most common Mopar Magnum vacuum leak source
• Valve seal condition (commonly worn on units past 150,000 miles)
• Timing chain stretch on high-mileage units
• Hydraulic roller lifter operation
• Block casting numbers and date code documented
• Front and rear seal condition disclosed before shipping

What Is Included, What Is Not Included

The 5.9 Magnum was a direct fit in the following vehicles:

Transmission pairings: 46RE 4-speed automatic (most common in Ram 1500), 47RE 4-speed automatic (Ram 2500/3500), NV3500 5-speed manual (Ram 1500), NV4500 5-speed manual (Ram 2500/3500). Tell us your transmission so we confirm the correct flexplate pattern at order.

Every used 5.9 Magnum we ship goes through this process:

• Compression test across all 8 cylinders, pressure per cylinder recorded
• Visual inspection of block deck, head surfaces, and oil galleries
• Hydraulic roller lifter operation verified
• Timing chain stretch checked and reported
• Plenum gasket condition inspected (known leak point)
• Valve seal condition assessed by visual smoke check on cold engine
• Year, casting numbers, and donor mileage documented when available

Mileage varies by donor unit. Where verified mileage is available, it is shared. Where mileage cannot be confirmed, we disclose this openly before payment. Full inspection notes are available on request.

FAQs

What vehicles use the 5.9 Magnum V8?