Nissan Maxima QX

1. Remove the main chain of the GRM drive with asterisks (see the Section Removal, check of a state and installation of a chain and asterisks of the GRM drive).

In case of need remove also assembly натяжителя / the directing secondary chain, having provided thereby adequate access to the pump.

2. Remove both sections of the pallet of a case of the engine (see the Section Removal and installation of the pallet of a case of the engine) and a maslozaborny tube.

3. Turn out bolts of fastening of the oil pump to a forward wall of the power unit.

4. Having accurately hooked, raise a casing of the pump and carefully remove it from the directing pins on the block.

2. Wash out internal components of assembly in solvent and attentively examine on existence of signs of excessive wear and mechanical damages.

3. Turn out a cap and take components of the reducing valve from a pump housing. Estimate a condition of working surfaces of the valve and its springs. In case of identification of defective components, replace all set. 1 — the Cap 2 — the Washer 3 — the External spring 4 — the Internal spring 5 — the Valve 6 — the Casing of the oil pump

4. By means of the probe of lezviyny type perform measurement of working gaps of gear wheels of the oil pump. Compare results of measurements to requirements of Specifications. During this check the following parameters have to be determined: a) A gap between teeths of internal and external gear wheels; b) A gap between the forming surface of an external gear wheel and the case; c) Axial side play of landing of an internal gear wheel d) Axial side play of landing of an external gear wheel; e) A radial gap of landing of the acting stupichny part of an internal gear wheel in a pump housing (it is calculated by subtraction of results of two measurements. At an exit any of parameters out of limits of admissible range assembly of the pump is subject to replacement.

5. Fill internal cavities of the pump technical vaseline. Enclose internal components in the case, establish a cover and strongly tighten screws of its fastening. Install into place carburetors of the reducing valve, strongly tighten a cap.