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:
Side Turn Light Inspection
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Outer mirror glass.
b. Upper outer mirror garnish.
c. Side turn light.
3. Apply battery voltage to side turn light terminal A, and connect terminal
B to ground.
4. Verify that the LED illuminates.
...
Electric Variable Valve Timing Actuator, Hydraulic Variable Valve Timing Actuator
Removal/Installation
WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it
is cool before servicing.
CAUTION:
Do not disassemble the electric variable valve timing actuator and hydraulic
variable valve timing actuator because they are precision units.
If ...
Intake Air Temperature (Iat) Sensor
IAT Sensor No.1
Purpose/Function
Detects the IAT before it passes through the throttle body as basic information
for mainly determining the fuel injection amount.
Detects the IAT before it passes through the throttle body and inputs it
to the PCM as an IAT signal.
Constru ...
