Oil pump
Removing
Unscrewing the bolt securing the oil pickup tube to the bracket
Unscrewing the bolt securing the oil catcher plate
The location of the bolts securing the oil pump and oil catcher plate
Removing the oil catcher plate
Unscrewing the oil pump mounting bolt
Removing the oil pump
1. Remove the oil pan.
2. Unscrew the bolt and remove the oil pump sprocket together with the drive chain.
3. Unscrew the bolt securing the oil pickup tube to the bracket (see fig. Unscrewing the bolt securing the oil pickup tube to the bracket).
4. Unscrew the bolts and remove the oil catch plate from the engine. Be aware that the two bolts holding the oil catcher plate also hold the oil pump (see fig. Unscrewing the bolt securing the oil catcher plate, Location of the bolts securing the oil pump and the oil catcher plate, Removing the oil catcher plate).
5. Unscrew the remaining bolt and remove the oil pump (see fig. Unscrewing the oil pump mounting bolt, Removing the oil pump).
Examination
Oil pressure relief valve for oil pump
1 - cork; 2 - pin; 3 - spring; 4 - piston; 5 - oil pump housing
1. Only parts of the oil pressure relief valve can be checked.
2. Unscrew the safety valve plug. When doing this, keep in mind that it is affected by the force of a compressed spring.
3. Remove spring, guide pin and piston (see fig. Oil pressure relief valve for oil pump).
4. Clean all parts, check their condition and replace if necessary.
5. Install the oil pressure relief valve parts in the reverse order of removal.
Installation
Installation is carried out in the reverse order of removal, taking into account the following points.
1. Fill the oil pump with clean engine oil before installation.
2. Install the oil pump sprocket with the convex side towards the pump.
Drive chain replacement
Attention! When replacing the oil pump drive chain, the oil pump sprocket must also be replaced.
Attention! When removing the chain, use an emery wheel or vulcanite to cut off the protruding hats of one of the chain links.
1. Remove the oil pan.
2. Unscrew the spark plugs.
3. Loosen the oil pump sprocket bolt.
4. Using an emery wheel or vulcanite, grind down the rivets on one of the chain links.
5. Remove the chain link fixing plate and knock out the chain link.
6. Remove the oil pump sprocket bolt and remove the sprocket from the pump shaft.
7. Install the new sprocket onto the oil pump shaft with the convex side toward the pump.
8. Using the link removed from the chain, connect the end of the old chain to the new chain. Turning the engine crankshaft clockwise, pass the new chain around the crankshaft sprocket. At the same time, keep the chain branches taut so that it does not come off the crankshaft sprocket.
9. After the new circuit comes out, disconnect the old circuit from it.
10. Install the ends of the new chain on the oil pump sprocket and connect them with a connecting link.
11. Install the fixing plate on the connecting link of the chain and rivet the connecting link. Check that no metal burrs remain after riveting the connecting link.
12. Tighten the oil pump sprocket bolt to the specified torque.
13. Install the oil pan.
14. Screw in the spark plugs.