Murano AWD V6-3.5L (VQ35DE) (2009)
Piston-to-Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter [direction (B), position (D)].
(Clearance) = (Cylinder bore inner diameter) - (Piston skirt diameter).
Standard and limit : Refer to See: Specifications
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If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to .
Re-boring Cylinder Bore
1. Cylinder bore size is determined by adding piston to cylinder bore clearance to piston skirt diameter.
2. Install main bearing caps and main bearing beam, and tighten to the specified torque. Otherwise, cylinder bores may be distorted in final assembly.
3. Cut cylinder bores.
NOTE:
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When any cylinder needs boring, all other cylinders must also be bored.
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Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a time.
4. Hone cylinders to obtain the specified piston to cylinder bore clearance.
5. Measure finished cylinder bore for the out-of-round and taper.
NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT MAIN JOURNAL DIAMETER
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Measure the outer diameter of crankshaft main journals with a micrometer.
Standard : Refer to See: Specifications
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If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to See: .
CRANKSHAFT PIN JOURNAL DIAMETER
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Measure the outer diameter of crankshaft pin journal with a micrometer (A).
Standard : Refer to See: Specifications
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If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer to See: Connecting Rod
Bearing/Service and Repair.
CRANKSHAFT OUT-OF-ROUND AND TAPER
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Measure the dimensions at four different points as shown in the figure on each main journal and pin journal with a micrometer.