Encore Tec 6.8L 3 Valve CNG
Built: 2016-2019 · Series: Other models
More machines from model year 2016
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Encore Tec – other heavy-duty road engines: the collective page of EPA-certified CNG engines outside the named ranges, 6.0- and 6.8-litre base, 279 to 325 hp, sequential injection, model years 2016 to 2019
Encore Tec is a US supplier of natural-gas engines for heavy-duty road vehicles based on large-displacement petrol engines converted to compressed natural gas (CNG); the model names 6.0L 2V CNG, 6.8L 2 Valve CNG and 6.8L 3 Valve CNG reflect the displacement and valve technology of the respective base engine. This page gathers the models outside the named ranges.
Read on 4 more paragraphs
The register lists here 3 versions with 279 to 325 hp rated output at 4,700 to 5,100 rpm, all with sequential injection and compressed natural gas as fuel. Maximum torque ranges from 374 to 450 Nm at 2,100 to 3,500 rpm, model years from 2016 to 2019; all versions carry a USA certification.
Such CNG engines drive medium-duty commercial vehicles such as municipal and distribution vehicles, where the switch to natural gas brings lower local pollutant emissions and often lower fuel costs compared with diesel.
Such conversion engines built on large-displacement petrol blocks run, like their base engine, on the Otto cycle with spark ignition and a stoichiometric mixture; exhaust treatment is therefore handled by a conventional three-way catalytic converter rather than the exhaust-gas recirculation, particulate filter or SCR system of a comparable diesel.
On a used purchase, the tightness of the gas system counts, along with the condition of the high-pressure tanks, the spark plugs and injection valves, and the service history of the gas pressure regulator; service and spare parts for these converted engines are concentrated among specialist US workshops.
Sources: SpecCodex register, model data: Encore Tec (weitere Heavy-Duty-Straßenmotoren)
Technical data
Engine
| Engine code | EL3-HBW6correct |
|---|---|
| Engine family | KEL3E06.8BW6correct |
| Engine families | GEL3E06.8314correct |
| Fuel | Compressed Natural Gascorrect |
| Rated output | 242.4 kW (= 325 hp)correct |
| Rated speed | 4,700 rpmcorrect |
| Maximum torque | 450 ft·lbfcorrect |
| Speed at max. torque | 2,100 rpmcorrect |
| Displacement | 6,800 cm³correct |
| Displacement | 6.8 lcorrect |
| Operating cycle | petrol enginecorrect |
| Injection | sequential injectioncorrect |
| Aspiration | naturally aspiratedcorrect |
Origin and approval
| Version | EL3-HBW6correct |
|---|---|
| Built from | 2016correct |
| Built to | 2016correct |
| Model year from | 2016correct |
| Model year to | 2019correct |
| Sales region | USA certificationcorrect |
Other data
| Application | Vocationalcorrect |
|---|
Frequently asked questions
How much power does the Encore Tec 6.8L 3 Valve CNG have?
The Encore Tec 6.8L 3 Valve CNG delivers 242 kW.
What engine does the Encore Tec 6.8L 3 Valve CNG have?
6,800 cm³ displacement, Compressed Natural Gas.
When was the Encore Tec 6.8L 3 Valve CNG built?
Production years: 2016-2019.
What to check before buying
- Match the data plate against the order: frame size, mounting and rating have to agree.
- For used units, ask about winding condition and bearing play.
- Ask about parts availability for this series — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 23 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: US EPA — engine certification data (retrieved August 2026) · How we check the data
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Parts for this engine (2)
Manufacturer part numbers from the official EPA documentation. No prices or availability — those come from the supplier.
| Part number | Description | Manufacturer |
|---|---|---|
| EL3-REG-AA | Fuel Injection Pump | Encore TEC |
| EL3-INJ-AA | Fuel Injector | Encore TEC |
Source: EPA HD Engines 2015–Present
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