Wasserboxer
| Volkswagen wasserboxer | |
|---|---|
 |
|
| Overview | |
| Manufacturer | Volkswagen Group |
| Production | August 1982–July 1992 |
| Combustion chamber | |
| Configuration | flat-4 petrol engine |
| Displacement | 1,914 cc (116.8 cu in), 2,109 cc (128.7 cu in) |
| Cylinder bore | 94.0 mm (3.70 in) |
| Cylinder block alloy | Cast aluminium alloy |
| Cylinder head alloy | Cast aluminium alloy |
| Valvetrain | pushrod OHV |
| Combustion | |
| Fuel system | carburettor / Electronic Fuel Injection |
| Fuel type | Petrol/gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Chronology | |
| Predecessor | Volkswagen air-cooled engine |
The Volkswagen wasserboxer is a four cylinder horizontally opposed pushrod overhead-valve (OHV) petrol engine developed by Volkswagen. The engine is water-cooled, and takes its name from the German: "wasserboxer" ("Water-boxer"); with "boxer" being another term for horizontally opposed engines. It was available in two displacements - either a 1.9-litre or a 2.1-litre; the 2.1-litre being a longer stroke version of the 1.9-litre, both variants sharing the same cylinder bore. This engine was unique to the Volkswagen Type 2 (T3) (Transporter T3 / Caravelle / Vanagon / T25), having never been used in any other vehicle. Volkswagen contracted Oettinger to develop a six-cylinder version of this engine. Volkswagen decided not to use it, but Oettinger sold a Volkswagen Type 2 (T3) equipped with this engine.
The wasserboxer featured a cast aluminium alloy cylinder block, cylinder heads, and pistons; and a die-forged steel flatplane crankshaft with three main bearings.
The wasserboxer, as with all Volkswagen boxer engines, directly drives the three-bearing camshaft via a small steel gear on the crankshaft, and a large aluminium one on the camshaft, so there is no timing belt or timing chain. The entire mechanism is internal to the engine, so there should be no concerns regarding wear or replacements, as long as the engine oil is changed regularly. The overhead poppet valves each feature two concentric valve springs, and are operated by pushrods, with adjustable rocker arms to facilitate valve clearance adjustment.
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