Mazda CX-5 Service & Repair Manual: Crankshaft, Main Bearing
Purpose, Function
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The crankshaft converts the reciprocating movement of the piston to a rotational movement via the connecting rod.
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The main bearing forms an oil film on the outer surface of the crankshaft journal to prevent wear due to sliding.
Construction
Crankshaft
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The crankshaft is installed to the inside (crankcase) of the cylinder block.
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The crankshaft has a key groove to match timing to the crankshaft pulley.
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The crankshaft has the following parts shown in the figure.
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The optimized shaft diameter ratio of the crankshaft journal and crank pin has reduced sliding resistance while maintaining rigidity.
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The steel crankshaft has five bearings and eight counterweights for improved accuracy in the rotational balance.
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The crankshaft journal and crank pin have been induction hardened* to bear high loads.
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The crankshaft has an oil passage for supplying engine oil to the crankshaft journal and crank pin.
Main bearing
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The main bearing is installed to the outer surface of the crankshaft journal.
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The upper main bearing and lower main bearing are made of aluminum alloy.
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The upper main bearing has an oil groove and oil hole.
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Thrust force is suppressed by the thrust bearings on both sides of the No.3 journal.
Crankshaft Position (CKP) Sensor
Purpose/Function
Detects the crankshaft speed as basic information for mainly determining
the fuel injection timing and ignition timing.
Detects the crankshaft speed and inputs it to ...
Motor Mounts
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Other materials:
Cargo Compartment Light Bulb Removal/Installation
1. Disconnect the negative battery cable..
CAUTION:
Always disconnect the negative battery cable before performing the cargo
compartment light bulb removal. Otherwise, the circuit may be shorted resulting
in damage to the related parts such as the rear body control module (RBCM).
...
Condenser Inspection
1. Inspect the condenser for cracks, damage, and oil leakage.
If there is any malfunction, replace the condenser.
2. Visually inspect for bent fins for clogging of foreign material.
If any fins are clogged, remove the foreign material.
3. Visually inspect for bent fins.
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Seat Belt Precautions
Seat belts help to decrease the possibility of severe injury during accidents
and sudden stops. Mazda recommends that the driver and all passengers always wear
seat belts.
All of the seat belt retractors are designed to keep the lap/shoulder belts out
of the way when not in use.
The driver&# ...
