1. Remove the timing belt and large timing gear.
2. Remove the oil pan.
3. Unscrew and remove the suction tube with the oil pump suction cup from the cylinder block. Remove the suction cup gasket.
4. Loosen the bolts and remove the cover with the oil pump from the fixing bolts of the front part of the engine block (photo 2.21). Note that the ignition timing indicator is screwed on two upper middle bolts that secure the pump cover to the housing, and the timing cover is screwed on two outer bolts. Remove the pump cover gasket. The manufacturer does not provide any values for clearances related to wear of the oil pump mechanisms, so we will assume that the pump is in good working order when the oil pressure corresponds to the pressure given in the technical data. However, you can visually check the oil pump as follows:
5. Using a hex key, unscrew the overflow valve plug and remove the spring and movable piston (photo 2.22).
6. Using an impact screwdriver, loosen the Phillips head bolts and remove the cover from the pump.
7. Remove the gears, paying attention to the fact that the mark on the outer wheel is on the side of the cover (photo 2.23).
8. Wash the parts in kerosene and wipe dry, then check the working surfaces for wear and possible damage. In case of damage to any gear, it is necessary to replace the entire oil pump, if it is in the reverse order to its disassembly, tighten the bolts and plugs.
9. To check the pump pressure, before dismantling the engine, it is necessary to unscrew the oil pressure sensor and screw in a pressure gauge with a scale from 0 to 10 bar in its place. The pressure at 2000 rpm should be equal to 20 bar.
Installation
10. Replace the seal in the oil pump housing.
11. Place a new gasket on the retaining bolts at the front of the engine block.
12. Install the oil pump, making sure that the internal gear of the pump enters the milled surface of the crankshaft and that the seal is not damaged.
13. Insert the bolts with the ignition timing indicator bracket (into two central holes), and also the inner plate of the timing belt cover, then tighten it evenly to a certain torque.
14. Put a new gasket under the sealing surface of the cuff, then put on the suction tube and install the oil pump suction cup so that the bracket hole matches the hole in the housing. Install all the bolts and tighten them to the appropriate torque, paying attention to the fact that the bolts securing the cuff are tightened completely before tightening the suction cup bracket bolt, which will improve the sealing of the suction tube cuff
15. Install and tighten the oil pan, timing belt and timing gear.
The original article is posted on the website VWMANUAL.ru
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