1. Front cover; 2. Internal gear; 3. Outer gear; 4. Oil pump cover
Caution: Before installing, apply fresh engine oil to the components marked in the illustration.
Disassembly
1. Remove the oil pump cover.
2. Remove the outer and inner gears from the front cover.
Check after disassembly
Clearances between oil pump components
Measure the clearance with a feeler gauge and ruler.
Lateral clearance between inner gear and front cover (position «1»).
Standard: 0.025-0.075mm
Lateral clearance between outer gear and pump front cover (position «2»).
Standard: 0.025-0.075mm
Calculate the clearance between the inner gear and the recess in the front cover as follows:
1. Using a micrometer, measure the outer diameter of the protruding section of the inner gear (position «3»).
2. Using an inside gauge, measure the inside diameter of the front cover (position «4»).
(Gap) = (front cover inner diameter) - (external diameter of the protruding section of the internal gear).
Standard: 0.045-0.095mm
Assembly
Assembly is carried out in the reverse order of disassembly.