Warning: Prolonged skin contact with used motor oil is quite dangerous. Use barrier cream and wear gloves during this procedure. Change oil-soaked clothing immediately.
Warning: Frequent engine oil changes are the number one preventive maintenance procedure available to the amateur mechanic. Over time, the oil is susceptible to dilution and contamination, which leads to premature engine wear.
Engine oil can be pumped out using a special probe (available at petrol stations) through the oil dipstick tube. After that, it is usually necessary to fill the system with oil.
Do not dispose of used oil with household waste or in any other way. This may cause environmental pollution.
When changing the oil, it is advisable to attach a tag to the engine with the brand of oil and its viscosity.
The use of oils of various types adversely affects the operation of the engine. It is also not recommended to mix different brands of oils. Engine oils of the same type and brand, but of different viscosities, can be mixed if necessary, in particular in the off-season.
Required Tool
- Inspection pit or hydraulic lift with stands (if the oil is not being sucked out).
- Head for unscrewing the drain plug.
- Special tool for unscrewing the filter (filter wrench, strap wrench or tool HAZET 2171-1).
- Oil collection tank (if the oil is not being sucked out) with a capacity of at least 6 liters.
Necessary spare parts and consumables
- Only if oil is not being sucked out: aluminum or copper O-ring for drain plug (sometimes supplied with an oil filter).
- Oil filter.
- The required amount of engine oil approved by the manufacturer, refer to Specifications.
Oil filter
Filters with replaceable paper elements are commercially available. Their advantage lies in the fact that only the filter element is subject to replacement.
The oil filter consists of a housing (1), covers (2) and filter element (3). The oil filter housing is bolted to the cylinder block in place of the old oil cartridge. Depending on the manufacturer, there may be a drain plug on the filter housing (4). Filter elements from different manufacturers are interchangeable regardless of the cartridge used.
Removal of impellent oil
Engine oil can be removed by suction, through the dipstick hole, or drained from the oil pan.
A suitable pump is required for suction. When doing this, make sure that the hose fits the hole and is of sufficient length.
1. Diesel engine: Unscrew the cap on the filter housing so that the oil can drain from the filter housing into the sump.
2. Suck or drain the oil. To do this, lift and place the car horizontally on stands or place the car over a viewing hole.
3. Remove the lower cover of the engine compartment, refer to Section Removal and installation of the upper engine cover / lower protection of the engine compartment / subframe.
4. Place a container for used oil under the drain plug. Be careful not to get hot oil on your hands when removing the drain plug. Therefore, when unscrewing the cork, keep your hand horizontal.
5. - Remove the drain plug (1) from the oil pan (2) and completely drain the used oil.
Caution: If there is a large amount of metal chips and wear products in the used oil, this indicates the presence of seizures, for example, in crankshaft bearings and connecting rod bearings. To eliminate undesirable consequences of the repair, it is necessary to thoroughly clean the oil channels and hoses. In addition, the oil cooler, if present, must be cleaned.
6. Finally, screw in the drain plug with a new O-ring. Do not exceed the permitted tightening torque, otherwise seal failure and damage may result.
7. Lower the car on wheels.
Oil filter replacement
Caution: Used filters or filter elements are special material and must be disposed of in a special way.
Gas engine
1. Disconnect the oil filter. Special tools are available for this, such as a strap wrench or the HAZET 2171-1 tool. Wipe off any spilled oil with a rag. The accompanying illustration shows an oil filter for a 4-cylinder engine.
2. Clean the oil filter flange on the cylinder block with fuel. Remove any remaining gasket.
3. Lubricate the rubber o-ring on the new filter with a thin layer of clean engine oil.
4. Fasten the new oil filter by hand. When the seal is seated on the cylinder block, turn the filter an additional 1/2 turn. If there are instructions on the filter housing, follow them.
Engines 2.4, 3.0L: After replacing the oil filter cartridge, check that the hoses leading from the oil cooler to adjacent parts pass freely and, if necessary, correct the position of the oil cooler.
Diesel engine 1.9 l
1. Unscrew the cover using a filter wrench, eg HAZET 2169 or VW/AUDI-3417.
2. Replace O-rings and filter element.
3. Torque tighten the cover with a filter wrench 25Nm.
Diesel engine 2.5L
1. Unscrew the filter cap (1) 32 mm filter wrench, e.g. HAZET 2169-2. Replace filter element (3), and a sealing ring (2) on the filter cover.
2. Screw the filter cover onto the housing and tighten it with a torque 25Nm.
3. Reinstall the engine top cover, refer to Section Removal and installation of the upper engine cover / lower protection of the engine compartment / subframe.
Filling the system with engine oil
Caution: For a diesel engine, when starting for the first time after changing the oil, make sure that the engine initially runs only at idle until the oil pressure control lamp goes out. Only after that the oil pressure reaches its full value and it is possible to give gas to the engine. If gas is given while the pressure control lamp is on, the turbocharger may be damaged due to insufficient lubrication.
1. Open the lid (1) and fill in new oil through the cylinder head cover filler port.
Caution: It is recommended to first pour in oil 0.5 l less than the required volume, start the engine, warm it up and after a few minutes check the oil level with a pointer. If necessary, add oil. Excess oil should be sucked off, because. otherwise, engine seals and catalytic converter may be damaged.
2. The oil level is normal if it is in the range (IN). If the oil level is in the range (WITH), oil must be topped up to the range level (IN). The accompanying illustration shows different versions of level indicators used in AUDI A4 engines. If the oil is in the range (A), it should not be topped up.
3. Drive the car and check the tightness of the drain plug and oil filter, if necessary, carefully tighten the plug.
4. After 3 minutes after stopping the engine, check the oil level again, correct if necessary.
5. Install the bottom cover of the engine compartment, refer to Section Removal and installation of the upper engine cover / lower protection of the engine compartment / subframe.
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