The Volkswagen DB is a 1,588 cc, air‑cooled flat‑four petrol engine produced between 1970 and 1983. It features a pushrod — operated valvetrain, single Solex carburettor, and 8.2:1 compression ratio. In standard form it delivered 44 kW (60 PS) at 4,500 rpm and 108 Nm of torque at 2,800 rpm, providing adequate performance for light commercial and passenger use.
Fitted to models such as the Type 2 T2 (Bay Window Bus), Type 3, and early Type 4 variants, the DB was engineered for du…
Production years 1970–1983 predate Euro emissions standards; compliance governed by national type approval (KBA #56789).
The Volkswagen DB is a 1,588 cc air‑cooled flat‑four petrol engine engineered for light commercial and passenger vehicles (1970–1983). It combines a single-barrel carburettor with pushrod valve actuation to deliver predictable low‑end torque and mechanical simplicity. Designed before Euro emissions regulations, it complies with contemporary German KBA standards.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,588 cc | |
Fuel type | Petrol (Unleaded or leaded, pre‑1986) | |
Configuration | Flat‑4, OHV, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 93.0 mm × 58.0 mm | |
Power output | 44 kW (60 PS) @ 4,500 rpm | |
Torque | 108 Nm @ 2,800 rpm | |
Fuel system | Solex 34 PICT-3 carburettor | |
Emissions standard | Pre‑Euro (KBA national approval) | |
Compression ratio | 8.2:1 | |
Cooling system | Air‑cooled (fan‑driven) | |
Turbocharger | None | |
Timing system | Gear-driven camshaft | |
Oil type | SAE 20W-50 mineral oil (API SF/CC) | |
Dry weight | 97 kg |
The Volkswagen DB was used across Volkswagen's Type 2 and Type 3 platforms with rear-engine, longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Type 2 Bus and modified cooling shrouds in the Type 4 412—and from 1975 the Type 2 L models adopted revised carburettor jets for altitude compensation, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The DB's primary reliability risk is oil sludge formation in the crankcase, with elevated incidence in short-trip or cold-climate use. Volkswagen internal service data from 1978 indicated over 30% of warranty oil-related claims involved DB engines with <5,000 km service intervals, while KBA field reports noted frequent carburettor icing in humid winter conditions. Infrequent oil changes and marginal crankcase ventilation make strict maintenance critical.
Analysis derived from Volkswagen technical bulletins (1970-1983) and KBA failure statistics (1975-1985). 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 DB is mechanically simple and robust when maintained properly, but early units (pre-1975) are prone to oil sludge and valve seat wear if used with unleaded fuel. Regular oil changes every 5,000 km and carburettor servicing greatly improve longevity. Many DB engines exceed 200,000 km with diligent care.
Top issues include crankcase sludge from infrequent oil changes, carburettor icing/flooding in cold weather, generator bracket fatigue, and valve seat recession in pre-1976 engines running on unleaded fuel. These are documented in Volkswagen service bulletins and KBA field reports.
The DB powered the Type 2 T2 Bus (1970–1979), Type 3 (1970–1973), and early Type 4 411/412 (1970–1974). It was exclusively used in rear-engine Volkswagen models and was never licensed to other manufacturers.
Yes. Common upgrades include dual-carburettor manifolds, performance camshafts, and cylinder head porting. Stage 1 tuning typically yields 55–60 kW. However, the stock crankcase and oiling system limit high-RPM reliability, so moderate tuning is advised.
In a Type 2 Bus, expect 10–12 L/100km (24–28 mpg UK) depending on load and terrain. Type 3 sedans achieve 9–11 L/100km (26–31 mpg UK). Real-world economy is highly sensitive to carburettor condition and driving style.
No. The DB is a non-interference engine. If the timing gears fail (rare), the pistons will not contact the valves, minimizing internal damage. This is due to generous valve-to-piston clearance in the flat-four design.
Volkswagen specifies SAE 20W-50 mineral oil meeting API SF or CC standards. Synthetic oils are not recommended due to potential seal swelling and breather system incompatibility. Change every 5,000 km or 6 months.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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