The pressure in the lubrication system is generated by a gear oil pump installed in the engine oil sump at the front of the cylinder block and driven by a chain drive from the crankshaft
The pump sucks oil from the engine oil sump through an oil receiver with a strainer and then through a full-flow oil filter with a porous paper filter element supplies it to the main oil line located in the cylinder block on the left side.
The oil supply channels to the main bearings of the crankshaft depart from the main line.
Oil is supplied to the connecting rod bearings through channels made in the crankshaft body.
From the main oil line, there is an oil supply channel to the camshafts.
To lubricate the camshaft bearings, oil from the vertical channel through the radial hole in the journal of the third bearing flows through a hollow bolt into the axial hole of the rocker arm axis, along which it is distributed between the rest of the camshaft bearings and the rocker arms of the valve drive.
The camshaft cams are lubricated with oil sprayed through the holes in the rocker arms.
Excess oil from the block head is drained into the oil sump through vertical drain channels.
Removal and installation of the oil pump
You will need tools: socket heads for 10, 13, 16, 18, Torx E8, E14, a square wrench, a set of screwdrivers, a clamp for installing a TDC, a camshaft lock, engine oil, an oil drain container.
Drain the oil from the oil pan (article - Replacing the oil and filter of the Renault Duster engine)
Remove the oil pan (article - Renault Duster engine oil pan gasket replacement)
Unscrew the two bolts securing the oil pump
Bolts are of different length
We lower the pump down a little
Remove the chain from the pump sprocket.
Install the parts in reverse order.
We tighten the bolts of the oil pump to a torque of 25 Nm.
Replacing the chain and gear wheel of the oil pump drive
We install the car on a lift or a viewing ditch
Drain the oil from the engine oil sump (article - Replacing the oil and filter of the Renault Duster engine)
Remove the accessory drive belt (article - Renault Duster accessory belt check and replacement)
We remove the timing belt (article - Checking and replacing the timing belt of the Renault Duster car)
Remove the oil pan (Renault Duster engine oil pan gasket replacement)
Remove the oil pump as described above
Remove the crankshaft gear
Unscrew the bolts securing the front crankshaft cover
Pry off the front crankshaft cover with a screwdriver
Remove the cover
Remove the pump drive chain
We remove the gear wheel of the drive of the oil pump
Install the parts in reverse order.
Before installing the front crankshaft cover, we clean the mating surfaces of the cylinder block
We clean the cover from the remnants of the sealant
We apply sealant to the mating surface of the front crankshaft cover and install the cover.
Defect detection and repair of the oil pump
You will need tools: socket heads for 10, 13, Torx E8, a square wrench, engine oil, a container for draining the oil, a special sealant, a wrench for 8, pliers, a metal ruler, a set of flat probes.
We remove the oil pump, as described at the beginning of the article
Drain the oil from the pump
Unscrew the five bolts securing the oil pump cover
Remove the oil pump cover.
We remove the spring retainer of the pressure reducing valve
The pressure relief valve spring is fitted with an interference fit. Remove the retainer carefully, holding the spring stop.
Removing the spring stop
We take out the spring
We take out the plunger of the pressure reducing valve
We measure the radial clearance between the gears and the pump housing
The gap should be 0.110-0.249 mm.
We measure the axial clearance of the gears. It should be equal to 0.020-0.086 mm.
If the clearances measured are not within acceptable values, replace the casing or pump assembly.
We wash the pump body and parts.
We remove deposits from the internal cavities of the pump.
We inspect the pump housing and cover.
In the presence of cracks, scratches, casting defects, damage to the threaded holes, we replace the casing or the pump assembly.
We check the pressure relief valve spring for residual deformation and bending.
We replace the damaged spring.
We check the gears for metal chipping, scoring and tooth wear.
We assemble the pump in reverse order.