Change of oil
Note: If the vehicle is operated under severe conditions, the intervals between the next replacement of impellent oil / oil filter should be shortened.
1. Regular and fairly frequent replacement of engine oil is one of the main preventive maintenance procedures for a car that lies within the skill of an average amateur mechanic. Over time, motor oil is subject to aging, which is manifested in its gradual dilution and contamination, leading to premature wear of internal engine components. The oil filter must be changed every time the engine oil is changed.
2. Make sure you have all the materials and tools needed to perform an oil and oil filter change on hand (see resist. illustration). Also, have enough rags and old newspapers ready to catch any spilled oil. Before changing the oil, the engine must be warmed up to operating temperature - hot oil is more fluid and better flushes out sludge and sediment.
6.2 Basic tools needed to change the engine oil and oil filter
1. Drain container - should be shallow and wide enough to minimize the chance of oil spilling onto the ground
2. Rubber gloves - will help protect your hands from burns if oil inevitably gets on them while turning out the drain plug of the oil pan
3. Gate - sometimes the drain plug is tightened quite tightly, which requires considerable effort when turning it out
4. A replaceable socket is used in tandem with a collar or a drive equipped with a ratchet when turning out the drain plug, must correspond to the latter in size
5. Tape wrench - allows you to unscrew the full-flow oil filter in conditions of limited access to it
6. A special ring wrench is put on the end of the filter and can then be rotated using a winch or ratchet drive, must match the filter housing in size
3. Oil from the engine can be removed in two ways: pumped out using a special syringe (devices) through the dipstick tube for measuring the level of impellent oil, or drained through the drain hole in the engine oil pan. Depending on the availability of appropriate equipment, you can choose any of them - the first is more preferable for a private garage, because. does not require special lifting equipment or a viewing hole. Park the vehicle on a level surface, apply the parking brake lever and stop the engine.
4. When changing oil on Z20NET7Z22SE / Z22YH / Y20DTH / Y22DTR engines, you must first remove the engine cover (see chapter 2).
5. Remove the oil filler cap.
6. On Z20NET / Z22SE / Z22YH / Z19DT / Y20DTH / Y22DTR engines, use a special ring wrench to remove the cover (see resist. illustration) oil filter. When the filter cap is unscrewed, oil starts to drain into the engine oil pan, wait until all the oil has drained from the filter, and then remove the filter element.
Note: On the Y30DT engine, remove the filter cover and replace the filter element after draining the engine oil (see below). At the service station, a special Opel tool, KM-6374, is used to remove the cover.
6.6 Removing the cover (2) oil filter using a special wrench (1) Opel KM-6150-1 (on the example of Z20NET/Z22SE/Z22YH engines)
7. Remove the dipstick from the tube (see Section 4) and pump out the oil using a special tool. If there is no special syringe / device, the engine oil can be drained from the crankcase, for which lift the car using a lift, drive it onto a flyover, or jack it up and place it on props.
Attention! Never carry out any work under the car, supported only by the bumper or held in a raised position only by a jack! Make sure that the car is securely fixed in the raised position.
8. Get under the car and familiarize yourself with the location of the oil pan drain plug (see resist. illustration).
Note: On the Y30DT engine, the drain plug is located at the bottom of the oil filter housing.
Remember that the power unit and components of the exhaust system will remain hot enough during the entire procedure - consider a safe hand manipulation scheme to avoid accidental contact with heated surfaces.
6.8 Drain plug (arrow) sump (1) engine
9. On diesel engines with a displacement of 1.9 liters, you must first unscrew the 17 mounting bolts and the engine crankcase protection. On diesel engines Y20DTH/Y22DTR/Y30DT, the crankcase guard is equipped with a service cover To remove it, unscrew 4-5 bolts (depending on the model)
10. Install a drain container under the oil pan so that at the first moment the jet will flow through the hole with a decent pressure. Trying not to touch the heated surfaces of the power unit and exhaust system components, remove the drain plug from the bottom of the oil pan. It is recommended to wear protective rubber gloves during this operation. Allow the oil to flow freely into the appropriate container, thus adjusting the position of the latter as the pressure of the jet weakens.
11. After the oil stops flowing out of the engine crankcase, carefully wipe the drain plug with a clean rag - small metal filings can stick to it, which will immediately lead to contamination of fresh oil. Check the drained oil for the presence of metal filings. If there is a large amount of metal chips or wear products in the engine oil, this creates a risk of clogging of the oil channels and damage to the parts of the crank mechanism, such as main or connecting rod bearings of the crankshaft. To eliminate possible consequences, it is necessary to thoroughly clean the oil channels and hoses, if necessary, replace the oil cooler.
12. Wipe the surface of the pan around the drain hole, screw the plug into place and tighten with the required force. Remember to replace the copper/aluminum seal on the drain plug threaded connection.
Note: A gasket is sometimes included with a new oil filter change.
13. Reinstall the service cover/crankcase if equipped. Collect traces of spilled oil, remove drain pan and tools from under the car. Lower the car to the ground. The oil filter is installed in place and tightened with the appropriate torque (see below). Don't forget to replace the engine cover.
Filter replacement
Note: When replacing the filter element/filter, the gaskets must be replaced without fail. As a rule, they are included in the replacement element / filter kit - check their availability when buying. If they are not included in the package, do not forget to purchase them additionally.
14. The models covered in this manual use oil filters with replaceable paper filter elements and replaceable oil filters. Instead of a one-piece replacement oil filter, a special filter can be used (see resist. illustration), that allows you to replace only the filter element. The oil filter/filter element is usually changed when the oil is changed.
6.14 Completely removable oil filter with replaceable filter element: 1. Filter housing; 2. Filter cover; 3. Replaceable filter element; 4. Drain hole
Note: Regardless of the filter version, the replaceable paper elements are interchangeable.
15. The procedure for removing the filter cover with a replaceable paper element is shown above (see paragraphs 4-6). After removing the cover, replace the replacement element and seals (see resist. illustrations).
6.15a Oil filter with replaceable paper element - option A (on the example of engines Z20NET7 Z22SE/ Z22YH): 1. Replaceable filter element; 2. Sealing gasket; 3. Oil filter cover
6.15b Oil filter with replaceable paper element - option B (on the example of engines Y20DTH and Y22DTR): 1. Oil filter cover; 2. Sealing gaskets; 3. Replaceable filter element
Note: On Z22SE and Z19DT engines (H) the sealing ring is installed in a special groove in the filter cover. Install the cover in place, tightening to the required torque (see specs).
16. Engines Z16XEP/Z18XE (R) are equipped with a non-separable fully replaceable filter. Their dismantling is carried out at the service station using a special tool Hazet-2172 (see resist. illustration) or you can simply pierce the side of the filter housing with a sharp screwdriver and use the screwdriver as a lever to unscrew the filter. After unscrewing the filter, in order not to spill the oil, let it drain into a container prepared in advance for this.
6.16 Removing the replacement oil filter using the special tool (on the example of the Z18XE engine)
17. Before installing the one-piece filter, wipe the filter seat on the engine block with a clean rag, if necessary, remove the remnants of the old sealing gasket, lubricate the sealing gasket of the new filter with clean engine oil.
18. Screw in the new oil filter by hand until there is slight resistance (the gasket pressed against the motor flange), then tighten the filter an additional half turn.
Note: The filter housing may contain additional information on its installation.
19. After replacing the filter element/filter, reinstall all removed components.
Tightening force of threaded connections, Nm
Engine oil pan drain plug:
- Z16XEP/Z18XE engines - 14
- Engine Z20NET/Z22SE/Z22YH - 25
- Engine Z32SE - 10
- Z19DT engine (H) — 20
- Engine Y20DTH/Y22DTR - 10
- Engine Y30DTH - 42
Oil Filter/Oil Filter Cap:
- Z19DT engine (H) — 30
- Engines Z20NET/Z22SE/Z22YH/Z32SE - 25
- Engines Z18XE, Z16XEP - 15
Filling with fresh engine oil
Note: The oil filling capacity indicated in the Specifications or the vehicle passport is approximate. Every time after changing the oil, it is imperative to check its level with a dipstick - if necessary, make an appropriate adjustment.
20. Pour fresh oil into the engine intake - use a funnel to minimize losses. Fill with oil about 12 liters less than the required amount (see specs at the beginning of the chapter), wait a few minutes, allowing the oil to drain into the sump, then check its level on the dipstick (see Section 4). If the level is above the low mark, start the engine with fresh oil circulating (the oil pressure indicator lamp at the first start may go out with a certain delay associated with the need to fill the volume of the filter element).
Note: To raise the oil level from the bottom (MIN) marks on the dipstick to the top (MAX) a little less than one liter of oil is required.
21. After running the engine for about one minute, shut it off again and immediately look under the car for leaks from the drain plug and full flow filter. Tighten the leaking component slightly if necessary.
22. During the circulation of oil through the engine (within 1 minute), the new oil filter is being filled. Now it is necessary to check the oil level again and, if necessary, add some more of it, bringing the level to the upper mark on the dipstick blade (check after about 5 minutes after turning off the engine - the oil should have time to completely drain into the oil pan). If the oil level is too high, then it must be pumped out, otherwise the increased pressure may cause the gaskets and seals of the lubrication system to be squeezed out, or an excess amount of oil may enter the catalytic converter of the exhaust gases and damage it. After a test run, recheck the oil drain plug and oil filter connections for leaks and tighten if necessary (respecting tightening forces).-
23. During the first few trips after changing the engine oil, check the oil level as often as possible.
24. Waste oil drained from the engine cannot be reused and must be handed over to a special collection point. In no case do not drain the waste to the ground or into the sewer - pour it into a hermetically sealed container and hand it over as soon as possible.
Engine oil temperature measurement
25. When carrying out various adjustment work, it may be necessary to accurately know the temperature of the impellent oil.
26. The oil temperature must be measured in the engine crankcase at a level of approximately 1 cm from the bottom of the crankcase. The measurement is made with a special device (see resist. illustration), for which it is necessary to insert the measuring probe of the device into the guide tube of the dipstick for measuring the level of impellent oil and push it until it touches the bottom of the crankcase, and then pull it out for about 1 cm
6.26 Measuring engine oil temperature
27. To prevent air from being sucked through the guide tube, the hole must be closed with a rubber stopper.
28. Oil temperature depends on engine load. Meaning 80°С corresponds to the normal operating temperature of the engine. Under extreme load, the oil temperature can reach 150°C.
Engine oil pressure measurement
29. To diagnose the condition of the oil pump and the degree of wear of the crankshaft bearings, the exact value of the oil pressure in the engine lubrication system can be measured. The procedure is described in Chapter 2.
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