Mazda CX-5 Service & Repair Manual: Crankshaft, Main Bearing
Purpose, Function
-
The crankshaft converts the reciprocating movement of the piston to a rotational movement via the connecting rod.
-
The main bearing forms an oil film on the outer surface of the crankshaft journal to prevent wear due to sliding.
Construction
Crankshaft
-
The crankshaft is installed to the inside (crankcase) of the cylinder block.
-
The crankshaft has a key groove to match timing to the crankshaft pulley.
-
The crankshaft has the following parts shown in the figure.
-
The optimized shaft diameter ratio of the crankshaft journal and crank pin has reduced sliding resistance while maintaining rigidity.
-
The steel crankshaft has five bearings and eight counterweights for improved accuracy in the rotational balance.
-
The crankshaft journal and crank pin have been induction hardened* to bear high loads.
-
The crankshaft has an oil passage for supplying engine oil to the crankshaft journal and crank pin.
Main bearing
-
The main bearing is installed to the outer surface of the crankshaft journal.
-
The upper main bearing and lower main bearing are made of aluminum alloy.
-
The upper main bearing has an oil groove and oil hole.
-
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
...
Other materials:
Propeller Shaft Inspection
1. Measure the propeller shaft center runout using the dial gauge.
If it exceeds the maximum specification, replace the propeller shaft as a
single component.
Propeller shaft maximum runout
0.8 mm {0.031 in}
2. Inspect the play and rotation of the joint by turning ...
B Pillar Lower Trim Removal/Installation
1. Remove the front scuff plate..
2. Remove the rear scuff plate..
3. Partially peel back the seaming welt.
4. Take the shaded area shown in the figure, and pull the B-pillar lower trim
in the direction of the arrow in the order of (1), (2) while detaching hooks A,
pins B.
5. Take th ...
Fuses
Your vehicle's electrical system is protected by fuses.
If any lights, accessories, or controls do not work, inspect the appropriate
circuit protector. If a fuse has blown, the inside element will be melted.
If the same fuse blows again, avoid using that system and consult an Authorized
Ma ...
