Table of contents: Disassembly and assembly ↓ Check - GA engines ↓ Check - SR engine ↓ Check - CD engines ↓
Disassembly and assembly
Disassembling the oil pump does not have any special features. When assembling, the following must be taken into account:
- The seal, gasket and O-ring must be replaced with new ones.
- When installing the pump, lubricate its gears with engine oil.
- Make sure the sealing ring is installed correctly.
Check - GA engines
Oil pump housing and gears. Using a feeler gauge, check the following gaps:
- Housing - driven gear (1) - 0.110-0.200 mm
- Pinion gear - crescent (2) - 0.217-0.327 mm
- Driven gear - crescent projection (3) - 0.21-0.32 mm
- Housing - drive gear (4) - 0.05-0.09 mm
- Housing - driven gear (5) - 0.05-0.11 mm
- Pinion gear - front housing bore (6) - 0.045-0.091 mm
If the clearance (2) is not within the specified limits, replace the gears. If clearances (1), (3)—(6) are exceeded, replace the front crankcase.
Pressure reducing valve. Visually inspect all parts for wear and damage. Pay attention to the valve sliding surface and the condition of the spring.
Apply engine oil to the valve and insert it into the hole (without spring). The valve should move freely under its own weight.
If damaged, replace the pressure relief valve assembly or oil pump.
Check - SR engine
Oil pump housing and gear. Using a feeler gauge, check the following clearances:
- Housing - driven gear (1) - 0.12-0.20 mm
- Driven gear - driving gear (2) - no more than 0.18 mm
- Housing - drive gear (3) - 0.05-0.09 mm
- Housing - driven gear (4) - 0.05-0.11 mm
- Pinion gear - front housing bore (5) - 0.045-0.091 mm
If clearance (2) is not within the specified limits, replace the gears. If clearances (1), (3) - (5) are exceeded, replace the front crankcase.
Pressure reducing valve. Visually inspect all parts for wear and damage. Pay attention to the valve sliding surface and the condition of the spring.
Apply engine oil to the valve and insert it into the hole (without spring). The valve must move freely under its own weight.
If damaged, replace the pressure relief valve assembly or oil pump.
Check the clearance between the valve and the oil pump cover.
- Gap (6) - 0.040-0.097 mm
If the gap is greater than the permissible limit, replace the oil pump cover.
Check - CD engines
Oil pump housing and gears. Using a feeler gauge, check the following clearances:
- Housing - driven gear (1) - 0.12-0.20 mm
- CD20E Engine - 0.114-0.200mm
- Driven gear - driving gear (2) - no more than 0.18 mm
- Housing - drive gear (3) - 0.05-0.09 mm
- Housing - driven gear (4) - 0.05-0.11 mm
- Leading gear - housing hole (5) - 0.05-0.09 mm
- CD20E Engine - 0.045-0.091 mm
If clearances exceed specified values, replace gears or pump assembly.
Pressure reducing valve. Visually inspect all parts for wear and damage. Pay attention to the valve sliding surface and the condition of the spring.
Apply engine oil to the valve and insert it into the hole (without spring). The valve should move freely under its own weight.
If damaged, replace the pressure relief valve assembly or oil pump.