Oil pump (models with SR engine) (Nissan Serena C24)

Disassembly and assembly

Preparatory work

Remove the front cover, see the section "Timing chain" in the chapter "Engine mechanical part".

Installing the internal and external gear

Align the gears with the marks towards the oil pump cover.

Examination

Checking clearances in the oil pump area

Clearance between outer gear and front cover

Using a feeler gauge, measure the gap (1) between the outer gear and the front cover.

• Normal clearance: 0.114-0.200 mm

Clearance between the teeth of the outer and inner gears



Using a feeler gauge, measure the gap (2) between the teeth of the outer and inner gears.

• Normal clearance: less than 0.180 mm

Lateral clearance between front cover and outer and inner gear

Using a feeler gauge and ruler, measure the gap between the front cover and the outer gear (4) and the inner gear (3).



Normal clearance:

• Internal gear: 0.050-0.090mm
• External gear: 0.050-0.110 mm

Gap at the bottom between the front cover and the internal gear

Calculate the clearance at the bottom between the internal gear and the oil pump housing as follows:

Using a bore gauge, measure the inside diameter of the lower section of the oil pump housing (position 5).

Using a micrometer, measure the outside diameter of the bottom section of the internal gear (position 6).

(Gap) = (Inner diameter of the lower section of the oil pump housing) - (Outer diameter of the lower section of the internal gear)

• Normal clearance: 0.045-0.091 mm