5.13.3. Repair of the oil pump

It will be required to you: a key hexagon "on 6", TORX T30 key, a caliper, a set of flat probes.
1. Remove the oil pump from the car (see. "Removal and installation of the oil pump").
2. Merge oil from the pump.
3. Take out from boring of the case any pointed tool (for example, the screw-driver) a forward epiploon of a bent shaft.
4. Turn out a stopper of the reducing valve from the case of the oil pump.
5. Take a spring and a plunger of the reducing valve from a case cavity.

The spring of the reducing valve is established with a tightness. In order to avoid getting injured turn out a stopper carefully.

6. Turn out screws of fastening of a cover of the pump …
7. … also uncover.
8. Take the leader from a case cavity …
9. … and conducted pump gear wheels.
10. Wash out a pump housing and the removed details to remove dirt and deposits. Remove dense varnish deposits from internal cavities of the pump, previously having softened them solvent.

Good advice
Varnish oil deposits well are removed the means which are available on sale for washing of the engine (so-called "five-minutes").

11. Examine the case and a cover of the pump. In the presence of cracks, scratches, defects of casting, the damaged carving openings replace the case (as it is not maintainable) or the pump assembled.
12. Check a plunger of the reducing valve for existence of scratches and traces of jamming. Small dents and agnails can be removed with grinding whetstone of small granularity.
13. Check a spring of the reducing valve for residual deformation and a bend. Replace strongly pressed out or damaged spring.
14. Check gear wheels for existence of a vykrashivaniye of metal, the tease and wear of teeths. Replace the damaged gear wheels or gear wheels on which the increased unilateral wear of teeths is swept visually up.
15. Check an axial gap between end faces of gear wheels and the plane of a cover of the pump. It can be made in two next ways.
16. At the first way measure the leader's thickness …
17. … and conducted gear wheels …
18. … and also boring depth in the case under gear wheels. Calculate an axial gap as a difference of arithmetic-mean value of depth of boring and thickness of gear wheels.
19. At the second way of check install the conducted gear wheel in the case, put a metal ruler (or a caliper) an end face on the case and measure by the probe a gap between the case and a ruler.
20. Similarly measure an axial gap of the leading gear wheel.
21. The most admissible gaps measured in both ways have to be 0,045–0,100 mm for the conducted gear wheel and 0,035–0,085 mm for the leading gear wheel. If at least one of gaps does not correspond to the specified value, replace the case or the pump assembled.
22. Collect the pump in the sequence, the return dismantling. Before a press fitting in a pump cover oil a forward epiploon of a bent shaft engine. Apply an anaerobic clamp of a carving on a carving of a stopper of the reducing valve and tighten a stopper.