3. Engine
ATTENTION
| Designation of the engine//Type//Beginning of release | |
| Engine 1.6 | AEH//OHC//7/96 – |
| Engine 1.8 | AGN//DOHC//6/96 – |
| Engine 1.8T |
AGU//DOHC//12/96 – 8/98 |
| Engine of 1.8 T | AQA, AJQ, APY//DOHC//9/98 – |
| Engine 1.9 TDI | AGR, ALH//OHC//6/96 – |
| Engine 1.9 TDI |
AHF//OHC//1/98 – |
| Engine 1.9 TDI | ASZ//OHC//5/00 – |
| Working volume of cylinders, cm3 | |
| Engine 1.6 | 1595 |
| Engines 1.8 | 1781 |
| Engines 1.9 TDI | 1896 |
| Power, kW (h.p.) at rpm//Torque, H · m at rpm | |
| AEH engines, |
74(101)/5600//145/3800 |
| AGN engine | 92(125)/6000//173/4100 |
| AGU, AQA engine | 110(150)/5700//210/1750 |
| AJQ engine | 132(180)/5500//235/1950 |
| APY engine | 154(210)/5800//270/2100 |
| Engine TDI AGR, ALH |
66(90)/4000//210/1900 |
| TDI AHF engine | 81(110)/4150//235/1900 |
| TDI (ASZ) engine | 96(130)/4000//310/1900 |
| Extent of compression | |
| Engines 1.6 | 10.2 |
| Engine 1.8 | 10.3 |
| Engine 1.8 | 10.3 |
| Engines 1.9 TDI | 19.5 |
| Pressure of a compression, bar | |
| Petrol engines standard value (new) | |
| 1.6, 1.8T |
10–13 |
| 1.8 |
9–14 |
| limit of wear | |
| 1.6, 1.8 | 7.5 |
| 1.8T | 7.0 |
| Diesel engines | |
| standard value (new) | |
| 1.9 TDI | 25–31 |
| limit of wear | |
| 1.9 TDI | 19 |
| Arrangement/number of cylinders//Number of valves on the cylinder | |
| Engines 1.6, 1.9 | line / 4//2 |
| Engines 1.8 | line / 4//5 |
| Operating procedure of cylinders | 1–3–4–2 |
| Diameter of cylinders, mm | |
| Nominal | |
| Engines 1.6, 1.8 | 81.010 |
| Engines 1.9 | 79.5 |
| The 1st repair | +0.250 |
| The 2nd repair | +0.500 |
| Course of pistons, mm | |
| Engines | 1.6 77.4 |
| Engines | 1.8 86.4 |
| Engines | 1.9 95.5 |
| Pistons | |
| Gap in the cylinder | 0.03 |
| Wear limit | 0.06 |
| Piston rings | |
| Gap in a flute, mm | |
| Compression | 0.02–0.07 |
| Oil scraper | 0.02–0.06 |
| Wear limit | 0.12 |
| Gap in a lock/limit of wear, mm | |
| Compression | 0.15–0.40/0.8 |
| Oil scraper | 0.25–0.50/1.0 |
| Three-component oil scraper to | 1.0/1.3 |
| Admissible minimum height of a head of cylinders | |
| Engines of 1.6 l | 132.60 mm |
| Engines of 1.8 l | 139.25 mm |
| Bent shaft | |
| Radical bearings | |
| Gap/limit of wear, mm |
0.02–0.06/0.17 |
| Maximum ovality, mm | 0.03 |
| Conrod bearings | |
| Gap/limit of wear, mm |
0.01–0.06/0.12 |
| Axial side play crankshaft / limit of wear, mm | 0.07–0.17/0.25 |
| Valvate gaps | Are not exposed since hydropushers are applied |
| Lubrication system | Compulsory circulating system with the gear oil pump |
| Pressure in system, bar on idling | 1.0 (2.0 - 1.6 k) |
| on 2000 rpm | 3.0 - 4.5 (2.0 diesel engine) |
| Pressure of fire of a control lamp, below | 1.2 – 1.6 (2.0 diesel engine) |
| Motive oil | |
| AUDI 500 00, AUDI 501 01, AUDI 502 00 AUDI 503 00 | |
| Amount of oil with replacement of the filter | |
| All engines |
4.5 l |
| Difference between the marks "max" and "min" in a measuring core | 1 liter |
| Cooling system | Circulating, with the water pump, the thermostat, the fan and a lamellar and tubular radiator |
| Volume of cooling liquid | |
| 1.6, 1.8 | 5.0 l |
| Air filter | Dry, with a paper element |
| Control system of the engine | |
| AEH | Simos 2 |
| AGN | Motronic M3.8.5 |
| AGU | Motronic M3.8.3 |
| AQA, AJQ | Motronic ME7.5 |
| APY | Motronic |
| Fuel | unleaded, is not worse than AI 95 (possibly application of AI 91 with insignificant power deceleration) |
| Efforts of tightening of threaded connections | |
| The moments of an inhaling of fixture are given also in the text and on some illyustratsiyakh*. * The moments of an inhaling highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately | |
| Bolts of a head of the block of cylinders | |
| Engines of 1.8 l |
AGN |
| 1st reception |
40 H · m |
| 2nd reception |
60 H · m |
| 3rd reception |
90 ° |
| 4th reception |
90 ° |
| AEH, AGU, APY engines | |
| 1st reception | 40 H · m |
| 2nd reception | 90 ° |
| 3rd reception | 90 ° |
| Diesel AHF, AGR, ALH engines | |
| 1st reception | 35 H · m |
| 2nd reception | 60 H · m |
| 3rd reception | 90 ° |
| 4th reception | 90 ° |
| Pulling up of bolts of fastening of a head of cylinders on the warm engine, when carrying out service or repair is not allowed. | |
| Bolts of covers of radical bearings of a bent shaft | |
| Engines of 1.6 l of AEH | |
| 1st reception | 40 H · m |
| 2nd reception | 90 ° |
| Other engines | |
| 1st reception | 65 H · m |
| 2nd reception | 90 ° |
| Bolts of covers of conrod bearings of a bent shaft | |
| All engines | |
| 1st reception | 30 H · m |
| 2nd reception | 90 ° |
| Fastening of the engine | |
| L engines 1.6, 1.8 | |
| Engine support to a body | 40 N • m + 90 ° |
| Engine support to a body | 40 N • m + 90 ° |
| Masloslivny stopper | |
| Everything, except a turbodiesel of 1.8 l (AGU) | 30 H · m |
| Turbodiesel of 1.8 l (AGU) |
50 H · m |
| Support of an engine/box and pendular lever | |
| M6 | 10 N of m |
| M8 | 20 N of m |
| M10 | 45 N of m |
| M12 | 65 N of m |
| Threaded connections of support of the engine | |
| The engine to the holder | 60 N of m + 90 ° |
| Support to a box | 40 N of m + 90 ° |
| Support to the chassis | 20 N of m + 90 ° |
| Box to the holder | |
| 1.8 l / 125 l. | 40 N of m + 90 ° |
| 1.8 l / 150 hp, 1.6 l, 1.9 l of TDI | 60 N of m + 90 ° |
| Flywheel (a driving disk – AT) |
60 N of m + 90 ° |
| Coupling basket to a flywheel | 20 N of m (25 N of m of AGU) |
| Crankshaft pulley | |
| Petrol engines | 90 N of m + 90 ° |
| Diesel engines | 120 N of m + 90 ° |
| Cam-shaft cogwheel | |
| Petrol engines (except AGU) | 100 N of m |
| AGU engines | 65 N of m |
| Diesel engines | 45 N of m |
| TNVD cogwheel | 20 N of m + 90 ° |
| Cam-shaft bed cover |
20 N of m (10 N • m of AGU, AGN) |
| Cover of rockers of a cam-shaft | 10 N of m |
| The inlet pipeline to a head of cylinders | |
| Petrol engines | 10 N of m |
| Diesel engines | 25 N of m |
| Final collector to a head of cylinders | 25 N of m |
| Spark plugs | 30 N of m |
| Spark plugs | 30 N of m |
| Lambda probe | 50 N of m |
| Detonation sensor | 20 N of m |
General information
4-cylinder engines of various types are used to installation in the car. Engines have water cooling and settle down across a motive compartment. The power unit is suspended above as a pendulum on two rubber-metal support. The torque is perceived by the support located below. Such fastening of the engine provides the minimum transfer of fluctuations on a body that promotes increase in comfort.
The block of cylinders is made of aluminum, cylinders are pressed and manufactured of gray cast iron. At some engines the block is entirely made of cast iron. The head of cylinders fastens to the block bolts. A head cast of aluminum, a saddle of valves steel, pressed. Also directing plugs of valves are made of steel. The pallet of a case is made of light alloy. In a case the motive oil necessary for lubricant and cooling of the engine gathers.
At petrol engines fresh fuel-air mix arrives on the one hand heads of cylinders, and products of combustion leave from the opposite side of a head. Such scheme provides bystry gas exchange via inlet and final valves. At diesel engines with I aim economy of the place the inlet pipeline and a final collector heads of cylinders are located on the one hand.
Petrol engine of 1.6 l, diesel engine of 1.9 l: the camshaft located in a head of cylinders is given to rotation by a gear belt from a bent shaft. The camshaft through hydropushers sets the freezing-up vertically inlet and final valves in motion. The diesel engine has direct injection which is made via the distributive fuel pump of high pressure (FPHP) of distributive type located sideways at the block of cylinders. The pump is set in motion by a gear belt.
Engine of 1.8 l: The engine has 3 inlet and 2 final valves. Inlet valves are set in motion by one camshaft, final other shaft. The camshaft of final valves is given to rotation from a bent shaft through a gear belt. For the drive of the camshaft of inlet valves it is connected by a chain to shaft of final valves. The multivalvate scheme provides the best filling of cylinders and more effective gas exchange that in turn promotes more effective use of energy of fuel-air mix. In the 92 and 154 kW engines of 1.8 l electrohydraulic adjustment of camshafts is applied. At the same time adjustment of position of the camshaft of inlet valves concerning a shaft of final valves depending on engine speed is carried out. The 110, 132 and 154 kW engines of 1.8 l have a turbo-supercharging.
All engines: Hydropushers provide automatic maintenance to constants of a valvate gap that excludes need of adjustment when carrying out maintenance.
Lubricant of engines is carried out by the oil pump placed in the case pallet. The oil pump by a chain from a bent shaft is given to rotation. Oil the pump from a case moves via channels to bearings of cranked and distributive shaft, and also to the working surfaces of cylinders.
The pump of cooling liquid is located sideways in the block of cylinders and is set in motion by a gear belt of the mechanism of gas distribution. It must be kept in mind that the cooling system has to be all the year round filled with mix of antifreeze and means for protection against corrosion, and also water with the low content of lime. The ridge maple belt sets in motion such auxiliary units as the generator, the pump of the power steering and if there is a conditioner compressor.
For preparation and ignition of fuel-air mix the engine control system which is not demanding service serves. Adjustment of the moment of ignition or idling within maintenance is not required. It is only regularly necessary to change candles and an element of the air filter. At the diesel engine within maintenance replace the fuel filter.
ATTENTION