Experience crisp throttle response and eliminate valvetrain clatter with the Ford Mercury 2.5L Remanufactured Engine across daily highway miles. This 2.5L 6-Cylinder 24-Valve DOHC long block features the revised XU3E-BA block casting and YS2E cylinder heads. Diamond plateau honing eliminates ring seating delays. Technicians must pre-fill the oil filter canister prior to startup to protect camshaft journals.

High-tensile cast aluminum alloy constructs the 60-degree V6 block carrying casting code XU3E-BA on top of the bellhousing, fitted with cast iron cylinder sleeves. Twin 24-Valve DOHC aluminum cylinder heads carry casting codes YS2E and F73E-DA. A micro-polished forged steel crankshaft spins within align-honed bearing saddles. Dry engine mass measures 220 lbs. Crate packaging dimensions span 36in length, 36in width, and 36in height, with a 5.5 quarts oil pan capacity.

Key Features of Ford Mercury 2.5L

Automotive repair centers buy Ford Mercury 2.5L remanufactured engine assemblies to restore aging sport coupes and sedans with true factory horsepower. This 24-Valve long block replaces tired powertrains in compact front-wheel-drive engine bays.

- Dual overhead camshafts actuate four valves per cylinder to maintain brisk mid-range highway passing torque.
- Re-machined XU3E-BA block casting preserves true bore roundness to eliminate oil consumption past piston rings.
- Forged steel crankshaft features micro-polished journals to preserve hydrodynamic bearing protection under acceleration.
- Centrifugal cast iron cylinder liners receive plateau hone passes to guarantee immediate ring seal.
- Multi-layer steel head gaskets seal combustion fire rings against extreme operating thermal expansion cycles.
- Hardened valve seats prevent valve recession under continuous high exhaust temperature conditions.
- Pre-timed dual timing chains eliminate valvetrain synchronization errors during shop installation prep.

Duratec Dyno Machining Precision Tolerances

Dynamometer spin testing confirms 170HP at 6,250 RPM and 165 ft-lbs torque at 4,250 RPM on unleaded gasoline. Crankshaft main journal runout measures within 0.0003in TIR across induction-hardened bearing surfaces. Connecting rod oil clearances hold at 0.0012in to prevent hydrodynamic bearing breakdown during high-RPM sweeps. Hot oil pressure sustains 55 PSI at 3,000 RPM with coolant stabilized at 195°F. Cylinder compression checks record 190 PSI across all six cylinders, verifying uniform valve seat concentricity and complete piston ring seal.

Vehicle Fitment Drivetrain Guide

Specific vehicle fitment includes 1999 to 2000 Ford Contour, 1999 to 2000 Mercury Mystique, and 1999 to 2000 Mercury Cougar models equipped with the 2.5L 2544cc V6 engine under Engine VIN Code L. Casting identification confirms block code XU3E-BA or ZU3E-6015-BA and head codes YS2E or F73E-DA. It mates with factory 4-Speed automatic and 5-Speed manual transaxles. This engine does not fit earlier 1995 to 1997 F53E platforms, 3.0L Taurus models, or SVT Contour high-output variants.

Installation Protocol Service Schedules

Pedestal cable linkages require smooth throttle plate movement without binding along the intake plenum bracket. Mechanics must replace intake manifold runner control box grommets and flush coolant circuits before first ignition. Never install this naturally aspirated production V6 long block in custom turbo configurations exceeding 6 PSI on stock compression pistons.

- Drain initial break-in engine oil and swap the spin-on filter after 500 operating miles.
- Inspect water pump auxiliary belt and serpentine tensioner every 10,000 driving miles.
- Change motor oil and filter every 3,000 miles using certified 5W-30 synthetic motor oil.

Warranty Terms Core Return Policy

Warranty coverage provides a 3-Year Unlimited-Mile replacement guarantee on internal lubricated rotating engine parts. Return your like-for-like core within 30 days using prepaid freight documentation to claim your core credit. The crated package contains the remanufactured long block, pre-installed timing components, oil pan, and shop installation guides.