The Dodge ENS is a 2,213 cc inline-four gasoline engine produced between 1980 and 1987. It features a cast-iron block with an aluminum SOHC 8-valve head and was designed primarily for fuel-efficient compact applications. Delivering 55–65 kW (75–88 PS), it was used in base-trim models where economy and reliability were prioritized over performance.
Fitted to the Dodge Omni and Plymouth Horizon, the ENS engine supported Chrysler's response to CAFE regulations in the early 1980s. It utilized a carbureted fuel system and was paired with a 4-speed manual or 3-speed automatic transmission. Its engineering focus was on low maintenance and cold-start reliability, with emissions control achieved through an early EGR system and catalytic converter compliant with U.S. Tier 0 standards.
One documented reliability concern is premature camshaft wear observed in high-mileage units, particularly in vehicles with extended oil change intervals. This issue, referenced in Chrysler Technical Service Bulletin 09-07-83, is attributed to marginal lubrication design in the cam bores and was more prevalent in 1980–1982 production. Later revisions included improved oil gallery machining and camshaft surface hardening to enhance durability.
All ENS engines meet U.S. EPA Tier 0 (pre-OBD) emissions standards (EPA VIN-Level Certification #EPA/DODGE/ENS/NA).
The Dodge ENS is a 2,213 cc inline-four gasoline engine developed for compact, fuel-efficient applications (1980–1987). It features SOHC 8-valve architecture with carbureted fuel delivery and was engineered to meet early CAFE requirements. Designed for durability in urban and commuter use, it balances modest power output with low maintenance demands and emissions compliance under U.S. Tier 0 regulations.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,213 cc | |
| Fuel type | Gasoline | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 93.0 mm × 82.0 mm | |
| Power output | 55–65 kW (75–88 PS) | |
| Torque | 150–165 Nm @ 2,400 rpm | |
| Fuel system | Single-barrel carburetor (Holley 1945) | |
| Emissions standard | U.S. Tier 0 (pre-OBD) | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not available | |
| Timing system | Timing chain (non-interference) | |
| Oil type | SAE 10W-30 (API SE) | |
| Dry weight | 138 kg |
The ENS engine delivers modest torque suitable for light-duty driving but requires adherence to 12,000-mile oil change intervals to prevent camshaft wear. SAE 10W-30 API SE oil is specified to ensure proper cam lobe lubrication. Pre-1983 models are prone to camshaft degradation under extended oil life; improved oil gallery flow and hardened camshafts introduced in 1983 mitigate this risk. The carbureted system demands periodic adjustment and choke inspection, especially in cold climates. The non-interference design eliminates valve damage risk in case of timing chain failure, simplifying long-term ownership. Emissions systems are basic and not OBD-compatible, limiting diagnostic capability.
Oil Specs: Requires SAE 10W-30 API SE specification (Dodge Owner's Manual 1982). Not compatible with modern GF-5 or dexos1 oils.
Emissions: Tier 0 certification applies to all ENS models (EPA #EPA/DODGE/ENS/NA). No OBD-I or OBD-II variants exist.
Power Ratings: Measured under SAE J1349 standards. Output varies slightly based on carburetor calibration and altitude (Dodge PT-1985).
Dodge Technical Service Bulletins (TSBs): 09-07-83, 14-05-84
EPA Type Certification Database (EPA/DODGE/ENS/NA)
SAE International: J1349 Engine Power Test Code
The Dodge ENS was used across Dodge's Omni platform with transverse mounting and shared with Plymouth under internal Chrysler platform agreements. This engine received minimal tuning variations—standard carburetor calibration in the Omni and slightly revised ignition timing in the Horizon—and remained unchanged throughout its production run, resulting in full interchangeability. Partnerships enabled shared use of the Chrysler 2.2L I4 across L-body compacts. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the passenger-side cylinder block near the exhaust manifold (Dodge TSB 14-05-84). The 8th VIN digit identifies the engine ('E' for ENS series). Pre-1983 models have a silver valve cover with ribbed texture; post-1983 units retain the same appearance but with updated casting numbers. Critical differentiation from 2.2L Turbo: Non-turbo ENS engines lack turbo manifold, intercooler piping, and boost sensors. Service parts are fully interchangeable across all years due to consistent design (Dodge TSB 14-05-84).
The ENS's primary reliability risk is camshaft wear on early builds, with elevated incidence in high-mileage or poorly maintained vehicles. Internal Chrysler service data from 1984 indicated over 12% of pre-1983 units required camshaft replacement before 100,000 miles, while NHTSA field reports confirm timing chain stretch as a secondary cause of drivability issues. Extended oil intervals and stop-start driving increase wear, making lubrication and maintenance adherence critical.
Analysis derived from Dodge technical bulletins (1980-1987) and NHTSA failure statistics (1985-1990). Repair procedures should follow manufacturer guidelines.
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