Oil pump
The Eaton rotary oil pump is driven by a chain from the crankshaft drive sprocket mounted on the front end of the crankshaft.
Oil pump specifications
Rotor outer diameter, mm: 57-0.0250.
Internal diameter of the pump housing, mm: 57.2+0.0250.
Rotor height, mm: 16-0.015-0.015.
Pump housing depth, mm: 16+0.050+0.050.
Radial clearance between the rotor and the pump housing, im: 0.10-0.15.
Axial clearance of the rotor in the pump housing, mm: 0.035-0.095.
Gap between outer and inner rotors, mm: 0.12-0.20.
Wear depth of the pump cover, mm: no more than: 0.05.
The distance between the wall of the pump housing and the surface of the drive gear in contact with the hub, mm: 42.7±0.1.
The length of the pressure reducing valve spring in the free state, mm: 68.0.
Reducing valve pressure, kg/cm2: 4.12-4.50.
Oil pressure, kg/cm2:
- at idle: 0.8-1.2;
- at 4000 rpm approx. 4.
The low oil pressure warning lamp lights up when the oil pressure is less than 0.35±0.15 kg/cm2.
46-link oil pump drive chain dimensions: 3/8"·5/32".
Number of teeth:
- crankshaft pulley: 18;
- oil pump drive gears: 27.
The tension of the oil pump drive chain is adjusted by selecting the thickness of the shim installed between the cylinder block and the oil pump housing, which is supplied in spare parts with a thickness of 0.10 and 0.30 mm.
Oil sump - steel, stamped.
Oil filter
An oil filter with a replaceable filter element and a pressure reducing valve is connected in series with the main engine oil line.
Reducing valve opening pressure, kg/cm2: 2.2±0.3. Oil filter brand: «315», «316», «318», «320», «320i»: Purolator PC 201; «318i»: Purolator PC 253.
Engine oil
Lubrication system capacity, l: 4 (including 0.25 l in oil filter).
The difference in the oil level between the lower and upper marks of the dipstick, l: 1.25.
Oil used: HD SAE 10W40.
Replacement frequency: every 7500 km or at least twice a year with the replacement of the oil filter.