Oil pump - gear, with internal gears and pressure reducing valve
The drive is carried out from the toe of the crankshaft.
The drive gear (smaller diameter) is mounted on two flats on the front end of the crankshaft.
The maximum diameter of the socket for the driven (large) gear during wear should not exceed 75.10 mm, the minimum width of the segment on the housing separating the drive and driven gears is 3.40 mm.
The axial clearance should not exceed 0.12 mm for the drive gear and 0.15 mm for the driven gear.
Usually, the pump is removed when repairing the engine, less often when the pump performance is poor.
Remove the crankshaft position sensor, for this:
We prepare the car and disconnect the negative battery terminal
Disconnect the crankshaft sensor connector
Use a 10 key to unscrew the sensor mounting bolt
We remove the sensor from the hole in the tide on the oil pump housing
- - Remove the alternator drive pulley (see How to check and replace the timing belt on the VAZ-21114 engine)
- - Remove the oil pan
- - Remove the oil receiver (see How to remove and install the oil receiver of the VAZ-21114 engine)
With a head of 10, we unscrew the six bolts securing the oil pump to the cylinder block.
Pry off the pump housing with a screwdriver
Remove the oil pump
Remove the oil pump seal
Clamp the pump in a vise with soft metal jaws.
Unscrew the pressure reducing valve plug with an 8 hexagon
The cork is sealed with an aluminum ring.
Remove the pressure reducing valve spring and piston
Using a 5 hexagon, we unscrew the six screws securing the cover to the pump housing.
Remove the pump cover and remove the driven and driving gears.
We wash the parts of the oil pump and check their technical condition - the diameter of the nest for the driven gear, the width of the segment on the housing, the axial clearances of the gears.
When assembling the pump, lubricate the surface of the outer diameter of the oil seal with engine oil and press it into cover 9 until it stops.
Cautiously secure the cover in a vise, place the gears with chamfers on the tops of the teeth inside the body 1 and tighten the screws that secure the body and cover.
Insert the pressure reducing valve, the spring and wrap the valve plug, placing an aluminum sealing ring 7 with a thickness of (1.5±0.2) mm under the plug.
The aluminum cover, when checking it in the area where the gears fit, should not have ledges, the surface of the cover should be flat.
In case of noticeable wear, clamp the cover at points 2 and mill the X and Y surfaces to a size of (13.5 ± 0.3) mm.
Maximum metal removal should not exceed 0.2 mm.
Replace the seal 1 of the crankshaft with a new one and press it in until it stops.
When pressing the gland, the force should be applied as close as possible to the outer diameter of the gland.
The working surfaces of the pump housing must not be scratched.
The limit diameter of the socket for the driven gear must not exceed 75.10 mm.
The minimum segment width must be at least 3.40 mm.
Basic dimensions of the new pump parts
Measure with the indicator the maximum axial clearances, which should not exceed 0.12 mm for the drive gear, 0.15 mm for the driven gear.
If the clearances exceed the limits, replace the gears.
Limit wear of gears. If their dimensions exceed the limits, also replace the gears.
Before assembling the pump, be sure to lubricate the drive and driven gears, the housing in the gear area, the sealing rubber ring of the oil receiver tube and the pressure reducing valve with engine oil