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cylinder head & valvetrain cast aluminium alloy; two valves per cylinder, 6 valves in total, each with two concentric valve springs, belt-driven single overhead camshaft (SOHC) aspiration Garrett GT1541V turbocharger [Family 15, 41 mm (1.6 in) compressor wheel (exducer diameter), VNT (Variable-Nozzle Turbine)], side-mounted intercooler (upright),
However, a new cylinder head is fitted to this "PD" engine, to accommodate "Pumpe Düse" Unit Injectors. identification parts code prefix: 038, 03G (VAG group indicate higher output models by a red 'I' on their TDI badge, e.g. 96 kW model Audi B6 A4. Because of this, the term 'red I' has entered into automotive technicians parlance)
This engine started as a straight-five-cylinder Audi diesel in 1989 (itself derived from the EA827 series), but got reduced to an inline-four-cylinder for Volkswagens use. It is related (through several evolutions of engine families) to the EA827 series, indirect-injection diesels, 16 valves, and five-cylinder gasoline engines.
The G60 is a 1.8-litre (1,781 cc) internal combustion engine, from a cylinder bore of 81 mm (3.19 in), and a piston stroke of 86.4 mm (3.40 in). Its cylinder block is constructed from grey cast iron, and its cylinder head is cast aluminium alloy, with additional post-production heat treatment.
Based on the Audi B5 S4 2.7 V6 biturbo, this engine was tuned by Cosworth Technology (now MAHLE Powertrain), and featured enlarged intake and exhaust ports on the cylinder heads, two uprated parallel turbochargers, and two side-mounted intercoolers (SMICs), together with new induction and exhaust systems, and a re-calibrated engine management ...
When this was updated the AQN/AZX engine had 20 valves in total, with 4 unequal sized valves per cylinder. Due to the use of a single cylinder head, a key design principle of the VR engines, exhaust and intake ports were of unequal length between the two cylinder banks. To mitigate this, Volkswagen used unequally sized valves to ensure even ...
Of their eight-cylinder petrol engines, all Volkswagen Group V8 engines are primarily constructed from a lightweight cast aluminium alloy cylinder block (crankcase) and cylinder heads. They all use multi-valve technology, with the valves being operated by two overhead camshafts per cylinder bank (sometimes referred to as 'quad cam').
Of their eight-cylinder petrol engines, all Volkswagen Group V8 engines are primarily constructed from a lightweight cast aluminium alloy cylinder block (crankcase) and cylinder heads. They all use multi-valve technology, with the valves being operated by two overhead camshafts per cylinder bank (sometimes referred to as 'quad cam').
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