The 1.0-liter Renault H4D or 1.0 SCe engine has been produced at a factory in Brazil since 2014 and is put in models such as the Clio and Twingo, as well as the third-generation Dacia Logan and Sandero. This powertrain on cars from Nissan is known as HR10DE, and on Smart under the index M281.
Renault H4D 1.0 SCe engine specifications
| Characteristics | Value |
|---|---|
| Precise volume | 999 cm³ |
| Power system | Distributed injection |
| Engine power | 61 – 73 hp |
| Torque | 91 – 95 Nm |
| Cylinder block | Aluminum, R3 |
| Cylinder head | Aluminum, 12v |
| Cylinder diameter | 72.2 mm |
| Piston stroke | 81.3 mm |
| Compression ratio | 10.5 |
| Engine Features | DOHC |
| Hydrocompensators | No |
| Transmission timing | Chain |
| Fasoregulator | Inlet |
| Turbocharger | No |
| Recommended oil | 3.0 liter 5W-30 |
| Environmental class | Euro 6 |
| Example service life | 250,000 km |
| Engine weight | 81 kg |
Cars with Renault H4D 1.0 SCe engine
The H4D 1.0 SCe engine is fitted to a range of compact Renault, Dacia, Nissan and Smart models, emphasizing its versatility and economy.
| Make and model | Years of manufacture |
|---|---|
| Dacia Logan 3 (LJI) | 2020 – present day |
| Dacia Sandero 3 (BJI) | 2020 – present |
| Renault Clio 5 (BF) | 2019 – up to date |
| Renault Twingo 3 (C07) | 2014 – 2020 |
| Nissan Micra 5 (K14) (as HR10DE) | 2017 – 2019 |
| Smart Fortwo 3 (C453) (as M281) | 2014 – 2019 |
| Smart Forfour 2 (W453) (as M281) | 2014 – 2019 |
Disadvantages and problems of the H4D engine
Despite its compact size and simple design, the H4D engine has a number of features that owners look out for. Known flaws and problems include:
- Cooling System: With the engine rear-mounted, it’s important to keep a close eye on cooling.
- Timing chain replacement: Some examples have seen the need to replace the timing chain as early as around 100,000 km.
- Oil consumption: After 100,000 km, increased oil consumption may occur due to seizure of the oil rings.
- Valve adjustment: Since there are no hydrocompensators, it is recommended to adjust the valve clearance every 100,000 km.
The Renault H4D 1.0 SCe is a reliable, economical engine for city cars, but to prolong its life it is important to keep an eye on maintenance and solve any problems in good time.