Nissan Maxima QX

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

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

2. Remove both sections of the pallet of a case of the engine (see. Section Removal and installation of the pallet of a case of the engine) and 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 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 from the pump case components of the reduktsionny valve. 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. With the help щупа lezviyny type make 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 should be defined: a) A gap between teeths of internal and external gear wheels; b) A gap between a forming surface of an external gear wheel and the case; c) Axial люфт landings of an internal gear wheel d) Axial люфт landings of an external gear wheel; e) A radial gap of landing of an acting stupichny part of an internal gear wheel in the pump case (it is calculated by subtraction of results of two measurements. At an exit any of parameters out of limits of an admissible range assembly of the pump is subject to replacement.

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