Chevy Impala Monte Carlo Rendezvous Pontiac Aztek Montana 3.4L V6 Remanufactured Engine 2004-2005

Experience responsive highway cruising by repowering your vehicle with this Chevrolet Impala 3.4L Remanufactured Engine long block. Engineered for front-wheel drive passenger minivans and sedans, this 6-Cylinder 12-Valve OHV motor stops intake coolant leaks. A mandatory trade-off requires replacing the coolant temperature sensor and upper plenum gaskets before startup to avoid unmetered air leaks and poor idle control.

Cast iron engine block casting carries numbers 227, 253, 089, or 934 on the driver side. Iron cylinder heads feature casting mark 12580234 with no air injection ports and no temperature sensor hole. Crated envelope dimensions measure 36in length by 36in width by 36in height with a net dry weight of 267 lbs. Rotating assembly includes crankshaft casting 981 or 268 with a 7-notch trigger ring, half-moon cam trigger, and a 4.5-quart oil pan.

Key Features of Chevrolet 3.4L

Fleet operators buy Chevrolet 3.4L remanufactured engine assemblies to restore peak torque and stop coolant loss in high-mileage utility vans. This precision long block provides balanced rotating dynamics while curing persistent valvetrain ticking.

- Block decks receive CNC resurfacing to Ra 25 finish to ensure leak-free cylinder head clamping
- Diamond plateau cylinder honing leaves cross-hatch oil grooves that seat piston rings within 500 miles
- Crankshaft journals undergo micro-polishing to hold 0.0003in TIR runout to safeguard rod bearings
- Align-honed main bearing journals maintain 0.0012in oil clearance to support hydrodynamic film pressure
- Cylinder head casting 12580234 eliminates secondary air ports for cleaner underhood plumbing
- Internal half-moon camshaft trigger integrates with factory sensors to ensure precise ignition timing
- Rebuilt 12-Valve cylinder heads feature multi-angle cut valve seats holding 0.001in concentricity

Dyno Load Precision Machining Tolerances

Dynamometer cell testing verifies 180 HP at 5,200 RPM and 205 ft-lbs continuous torque at 4,000 RPM under operational load cycles. Machining processes hold crankshaft journal runout below 0.0003in TIR and connecting rod bearing oil clearances at 0.0012in. Plateau-honed cylinder walls deliver uniform compression between 175 PSI and 180 PSI across all 6 combustion chambers. Hot engine oil pressure measures 50 PSI at 2,500 RPM while regulated coolant operating temperatures maintain 195°F to confirm cooling jacket flow integrity.

Vehicle Fitment Drivetrain Guide

This remanufactured long block fits 2004 to 2005 Buick Rendezvous, Chevrolet Impala, Monte Carlo, Venture, Oldsmobile Alero, Silhouette, Pontiac Aztek, Grand Am, and Montana models equipped with the 3.4L 3350cc V6 engine and VIN code E. Fits front-wheel drive transaxles paired with 4-Speed Automatic transmissions. Warning: this unit features half-moon cam triggers and no secondary air ports. It does not fit motorhome chassis, rear-wheel drive conversions, or early 2003 and older 3.4L configurations.

Installation Protocol Service Schedules

Install upgraded aluminum carrier lower intake manifold gaskets and torque bolts to factory specifications to eliminate coolant mixing. Clean out heater core tubes and inspect throttle body position sensor connections before cranking. Never install this non-turbo long block into commercial motorhomes or towing applications exceeding vehicle gross weight limits.

- Fill crankcase with 4.5 quarts of SAE 5W-30 break-in motor oil before cranking
- Drain break-in lubricant and install a new spin-on filter after 500 miles
- Schedule routine engine oil and filter service every 3,000 miles or 5,000 miles

Warranty Terms Core Return Policy

We protect this remanufactured engine with an industry-tested 3-Year Unlimited-Mile parts warranty for complete owner assurance. We provide prepaid freight pickup for your rebuildable core block within an authorized 30-day window. Each crate delivers the assembled long block, oil pan, front timing cover, valve covers, and printed installation manuals.