The Chrysler ENR is a 3,500 cc, 60° V6 petrol engine produced between 2007 and 2010. It features sequential multi-port fuel injection, an aluminum block and heads, and a dual overhead camshaft (DOHC) valvetrain. This engine was designed as a performance-oriented upgrade, delivering 250 hp (186 kW) and 250 lb‑ft (339 Nm) of torque for responsive acceleration.
Fitted primarily to the LX-platform sedans and coupes, including the Chrysler 300C and Dodge Charger, the ENR was engineered for drivers seeking a blend of American V8-style power with V6 efficiency. Emissions compliance for its production period was achieved through its electronic fuel injection and catalytic converter system, meeting the applicable US federal Tier 2 Bin 5 standards for light-duty vehicles.
One documented engineering update involved the variable valve timing (VVT) oil control solenoid. Early 2007 units were prone to solenoid sticking due to debris in the oil passages, potentially triggering check engine lights. Chrysler addressed this by revising the solenoid filter screen and issuing a service procedure for cleaning or replacement, as detailed in Technical Service Bulletin 09-009-07.
Chrysler
Production years 2007–2010 meet US Federal Tier 2 Bin 5 emissions standards (EPA Certificate of Conformity #A-07-15).
The Chrysler ENR is a 3,500 cc 60° V6 petrol engine engineered for performance sedans and coupes (2007-2010). It combines sequential multi-port fuel injection with dual overhead camshafts and variable valve timing to deliver strong, linear power. Designed to meet US Federal Tier 2 Bin 5 emissions standards, it balances spirited performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,500 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | 60° V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 96.0 mm × 81.0 mm | |
| Power output | 250 hp (186 kW) @ 6,400 rpm | |
| Torque | 250 lb-ft (339 Nm) @ 3,800 rpm | |
| Fuel system | Sequential multi-port fuel injection (SMPI) | |
| Emissions standard | US Federal Tier 2 Bin 5 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with Variable Valve Timing (VVT) | |
| Oil type | API SM 5W-20 | |
| Dry weight | 375 lbs (170 kg) |
The DOHC and VVT design provides a broad, flat torque curve and high specific output but requires precise oil quality and change intervals to protect the VVT solenoids and timing chains. The 10.3:1 compression ratio demands premium unleaded fuel (91 octane or higher) for optimal performance and to prevent knock. The aluminum construction reduces weight but requires careful attention to coolant mixture to prevent corrosion. The revised VVT solenoid (post-TSB 09-009-07) is a recommended upgrade for early 2007 vehicles.
Oil Specs: Requires API SM 5W-20 specification (Chrysler Owner's Manual 2007). API SN or SP 5W-20 is an acceptable backward-compatible replacement.
Emissions: US Federal Tier 2 Bin 5 certification applies to all 2007-2010 model year vehicles (EPA Certificate #A-07-15).
Power Ratings: Measured under SAE net standards (J1349). Ratings are for the base ENR configuration in sedan applications (Chrysler Powertrain Guide 2007).
Chrysler Service Manual (Publication 81-270-0701)
Chrysler Electronic Parts Catalog (EPC) Doc. 81-27-110-07
EPA Certificate of Conformity Database (Certificate #A-07-15)
SAE International: J1349 Engine Power Test Code
The Chrysler ENR was used across Chrysler Corporation's LX platform with longitudinal mounting and was not licensed to other manufacturers. This engine received platform-specific adaptations-primarily related to accessory drive layouts and engine management calibration for different model trims. All adaptations are documented in OEM technical bulletins.
The engine code "ENR" is stamped on a machined pad on the left (driver's side) front of the cylinder block, near the timing cover (Chrysler Service Manual 81-270-0701). The 8th digit of the VIN will be "R" for vehicles equipped with this 3.5L V6 engine. Visually, it can be identified by its aluminum block and heads, dual overhead camshafts with visible cam covers, and the "3.5L V6" badge on the intake manifold. It is distinct from the smaller 2.7L V6 (code EER) and the larger 5.7L HEMI V8 (code EGH) by its displacement and specific intake manifold design.
The ENR's primary long-term reliability consideration is maintaining oil quality and level to protect the variable valve timing (VVT) system and timing chains. Internal Chrysler service data indicates that the majority of VVT-related faults are linked to infrequent oil changes or using incorrect oil viscosity. The timing chains are generally robust but rely on clean, properly flowing oil for lubrication. Regular oil changes with the correct specification are critical for longevity.
Analysis derived from Chrysler technical bulletins (2007-2010) and internal service reports. Repair procedures should follow manufacturer guidelines.
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