Removing
The pressure reducing valve can be removed without first dismantling the pump assembly.
1. Remove the timing belt (see Removing and installing timing belt).
2. Remove the crankshaft and camshaft gears, as well as the timing belt tensioner (see Removal and installation of the timing belt tensioner and timing gears).
3. Turn out bolts of fastening of a back cover of a drive of GRM from a head of cylinders and the case of the oil pump, remove a cover from the engine.
4. Remove the oil pan and oil pickup (see Removal and installation of the oil pan).
5. Disconnect the electrical wiring from the emergency oil pressure sensor.
6. Turn out a bolt of fastening of the gauge of position of a cranked shaft, take away the gauge from the pallet.
7. Turn out bolts of fastening of the case of the oil pump. Extremely carefully remove the pump housing from the crankshaft trunnion - try not to let the guide bushings fall out. Remove the body seal. The gasket can be thrown away - during assembly it must be replaced without fail.
Service
1. Remove the fixing screws and remove the back cover of the pump.
2. Marker (in no case not with a center punch and not a chisel!) mark the installation position of the inner and outer gears of the pump - during assembly, the components must be installed in exactly the same way.
3. Remove the inner and outer gears from the pump assembly housing.
4. Unscrew the pressure relief valve plug from the assembly housing, remove the spring and plunger from the seat, try to remember the installation position of the components. Remove the sealing washer from the plug.
1 - Plunger
2 - Spring
3 - Sealing washer
4 - Plug
The valve can be dismantled without first dismantling the pump.
5. Thoroughly clean all components and carefully inspect them for signs of excessive wear, chips, nicks or other mechanical damage. Replace damaged elements. In case of defects in the gears or housing, the entire pump assembly must be replaced.
6. If the condition of the components is found to be satisfactory, use a blade-type feeler gauge to measure the gap between the teeth of the inner and outer gears, as well as the amount of axial play of the gears and the flatness of the cover. If the result of any of the measurements is out of range (see Specifications), replace the pump assembly.
7. Assemble the pump in the reverse order. Pay attention to the following points:
8. Make sure both gears are installed correctly (see markings made during disassembly).
9. Do not forget to replace the sealing washer of the pressure reducing valve plug - tighten the plug itself with the required force
10. Before screwing in, clean the threaded part of the mounting bolts and apply a layer of fresh sealant to it, make sure that all fasteners are tightened with the required force.
11. Upon completion of assembly, fill the pump with fresh impellent oil by manually rotating its internal gear.
Installation
1. Before installing the pump, remove the crankshaft oil seal from the pump housing by carefully prying it off with a suitable slotted screwdriver. Fill a new epiploon with sealing sponges in the engine. Press the stuffing box with a cylindrical mandrel flush with the pump casing. Make sure that the mandrel rests only on the hard outer edge of the stuffing box.
As a mandrel, you can use an interchangeable socket head of a suitable size or a piece of pipe of the appropriate diameter. Having planted an epiploon, grease its sealing sponges with pure motive oil.
2. Make sure that the mating surfaces of the pump housing and block are absolutely clean and dry. Make sure that the guide bushings are in their regular places.
3. Install a new gasket on the cylinder block.
4. Carefully install the pump in place - make sure that the internal gear is correctly entered into engagement with the chamfers of the crankshaft. Place the pump assembly onto the guide bushings with extreme care, being careful not to damage the packing lips on the lugs (1) and chamfers (2).
5. Screw in the pump housing mounting bolts and tighten them to the required torque.
6. Connect the electrical wiring to the oil pressure sensor sensor. Reinstall the crankshaft position sensor in the pump housing (CKP), screw in and tighten with the required force the bolt of its fastening.
7. Install oil pickup and oil pan (see Removal and installation of the oil pan).
8. Install the rear timing cover on the engine - make sure that the mounting bolts are tightened with the required force.
9. Install gears and timing belt tensioner (see Removal and installation of the timing belt tensioner and timing gears). Install timing belt (see Removing and installing timing belt).
10. Finally, change the oil filter (see chapter Current service).
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