The Chrysler EZH is a 2,429 cc, inline‑four petrol engine produced between 2001 and 2006. It features a cast iron block, aluminum cylinder head, dual overhead camshafts (DOHC), and 16 valves. This iteration introduced variable valve timing (VVT) on the intake camshaft, enhancing low-end torque and emissions control while maintaining 150 hp output.
Fitted to the JR platform Chrysler Sebring, Dodge Stratus, and the MY2001–2006 Cirrus facelift, the EZH was engineered for refined, quiet operation and improved fuel efficiency over its EEB predecessor. Emissions compliance for North American markets was achieved through sequential multi-port fuel injection and an enhanced catalytic converter system, meeting US Federal Tier 2 standards.
A documented service concern involves the variable valve timing solenoid, which can become clogged with oil sludge, leading to erratic timing and reduced performance. This issue, addressed in Chrysler Technical Service Bulletin 09-012-04, is often linked to infrequent oil changes or use of incorrect viscosity.
Production years 2001–2006 meet US Federal Tier 2 emissions standards (EPA Certification #AID-01-02).
The Chrysler EZH is a 2,429 cc inline‑four petrol engine engineered for mid‑size sedans (2001-2006). It combines DOHC 16-valve architecture with intake variable valve timing (VVT) to deliver improved low-end torque and fuel efficiency. Designed to meet US Federal Tier 2 emissions standards, it offers a balance of refinement and adequate power for daily driving.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,429 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 87.5 mm × 101.0 mm | |
| Power output | 150 hp (112 kW) @ 5,500 rpm | |
| Torque | 165 lb-ft (224 Nm) @ 4,000 rpm | |
| Fuel system | Sequential multi-port fuel injection (SFI) | |
| Emissions standard | US Federal Tier 2 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | API SL 5W-30 | |
| Dry weight | Unavailable |
The addition of VVT provides a broader, flatter torque curve for improved drivability in traffic but introduces a dependency on clean oil for solenoid operation. Strict adherence to the 60,000-mile timing belt replacement interval remains critical to prevent interference engine damage. The VVT solenoid is susceptible to clogging from oil sludge; using the specified 5W-30 API SL oil and adhering to 3,000-5,000 mile change intervals is essential. Vehicles exhibiting rough idle or reduced power should have the VVT solenoid inspected per TSB 09-012-04.
Oil Specs: Requires API SL 5W-30 specification (Chrysler Service Manual 01-06). Critical for VVT solenoid function.
Emissions: US Federal Tier 2 certification applies to all 2001-2006 EZH engines (EPA Certification #AID-01-02).
Power Ratings: Measured under SAE J1349 standards (Chrysler Group Service Manual 01-06). Torque increased to 165 lb-ft vs. EEB.
Chrysler Technical Service Bulletin (TSB): 09-012-04
Chrysler Electronic Parts Catalog (ETK): Doc. P5378902AC
Chrysler Group Service Manual (2001-2006)
US Environmental Protection Agency (EPA) Certification Database: #AID-01-02
The Chrysler EZH was used across Chrysler's JR platform with transverse mounting. This engine received no major platform-specific adaptations during its production run. All applications are documented in OEM service manuals.
Locate the engine code stamped on a flat pad on the front of the cylinder block, just below the exhaust manifold (Chrysler Service Manual 01-06). The 8th digit of the VIN will be 'E' for vehicles equipped with the 2.4L DOHC engine. The EZH is visually distinguished from the non-VVT EEB by the presence of a variable valve timing solenoid mounted on the front of the cylinder head, near the timing cover. Critical differentiation from the turbocharged EDZ: EZH has no turbocharger. Service parts for the EZH are generally interchangeable across all JR platform applications from 2001-2006, though VVT components are specific to this variant.
The EZH's primary reliability risk is VVT solenoid failure due to oil sludge, with elevated incidence in vehicles subjected to extended oil change intervals. Chrysler TSB 09-012-04 documents this as a known concern, while owner reports frequently cite the issue. Neglecting oil changes accelerates solenoid clogging, making adherence to the maintenance schedule critical.
Analysis derived from Chrysler technical bulletins (2001-2006) and owner-reported failure data (2001-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHRYSLER EZH.
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