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.
Removing the oil pump drive chain
1 - fixing plate; 2 - chain link; 3 – a bolt of fastening of an asterisk of the oil pump; 4 – an asterisk of the oil pump
1. Remove the oil pan.
2. Loosen the oil pump sprocket bolt.
3. Using an emery wheel or vulcanite, grind down the rivets on one of the chain links.
4. Remove the chain link fixing plate and knock out the chain link (see picture).
5. Remove the oil pump sprocket bolt and remove the sprocket from the pump shaft.
6. Install the new sprocket onto the oil pump shaft with the convex side toward the pump.
7. 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.
8. After the new circuit comes out, disconnect the old circuit from it.
9. Install the ends of the new chain on the oil pump sprocket and connect them with a connecting link.
10. 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.
11. Tighten the oil pump sprocket bolt to the specified torque.
12. Install the oil pan.