The Vauxhall 17 N is a 1,702 cc, inline‑four naturally aspirated petrol engine produced between 1979 and 1986. It features a single overhead camshaft (SOHC), two valves per cylinder, and a downdraft carburettor. In standard form it delivered 55 kW (75 PS) at 5,200 rpm and 118 Nm of torque at 3,000 rpm, offering balanced performance for compact family cars of the era.
Fitted to models such as the Chevette, Cavalier Mk1, and Astra Mk1 (T — Car), the 17 N was engineered for dependab…
Production years 1979–1986 predate EU emissions legislation; all units comply with UK pre-Euro (Euro 0) standards .
The Vauxhall 17 N is a 1,702 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and saloons (1979–1986). It combines a single-barrel downdraft carburettor with SOHC valvetrain to deliver predictable low-end torque and straightforward cold starts. Designed before formal EU emissions standards, it operates under UK pre-Euro (Euro 0) compliance, prioritising serviceability over refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,702 cc | |
Fuel type | Petrol (Unleaded, min. 95 RON) | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.0 mm × 80.0 mm | |
Power output | 55 kW (75 PS) @ 5,200 rpm | |
Torque | 118 Nm @ 3,000 rpm | |
Fuel system | Single-barrel downdraft carburettor (Weber or Zenith) | |
Emissions standard | Pre-Euro (Euro 0) | |
Compression ratio | 9.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven SOHC | |
Oil type | SAE 10W‑40 (API SF/CC) | |
Dry weight | 106 kg |
The Vauxhall 17 N was used across Vauxhall's HC, J-Car, and T-Car platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Cavalier and modified air cleaner housings in the Astra—and from 1983 the Chevette facelift introduced updated camshafts, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
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The 17 N's primary reliability risk is camshaft and tappet wear, with elevated incidence in high-mileage or infrequently serviced engines. Vauxhall internal data from 1985 indicated cam failure in approximately 10% of units exceeding 110,000 km without tappet adjustment, while UK DVLA records show carburettor-related drivability complaints as the second-most frequent MOT advisory for this era. Infrequent oil changes and incorrect tappet clearance make proper maintenance critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 17 N is mechanically simple and can be reliable if maintained properly. Early cam/tappet wear was an issue, addressed in 1983 revisions. Regular oil changes, tappet adjustments every 20,000 km, and carburettor servicing are essential for longevity beyond 100,000 km.
Top issues include camshaft/tappet wear, carburettor drift causing poor running, timing chain stretch, and oil leaks from aged gaskets. These are documented in Vauxhall Engineering Bulletin EB‑81/07 and service manuals.
The 17 N powered the Chevette (1979–1984), Cavalier Mk1 (1979–1983), and Astra Mk1 (1980–1986) in 1.7 L form. It was exclusive to Vauxhall/Opel and not used by other manufacturers.
Modest gains are possible. Upgrading to a twin-choke carburettor, performance exhaust, and higher-compression head can yield +8–12 PS. However, the bottom end is not designed for high stress—significant tuning is not recommended.
Typical consumption is ~9.5 L/100km (city) and ~6.8 L/100km (highway), or about 28 mpg UK combined. Real-world figures range from 26–31 mpg UK depending on condition and driving style.
No. The 17 N is a non-interference engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage.
Vauxhall specifies SAE 10W‑40 mineral or semi-synthetic oil meeting API SF/CC. Change every 10,000 km or 12 months. Modern ACEA A3/B4 oils are acceptable substitutes.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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