Hydraulic Lash Adjuster (HLA) Removal/Installation: Notes

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing.

CAUTION:

If the camshaft is rotated with the timing chain removed and the piston at the top dead center position, the valve may contact the piston and the engine could be damaged. When rotating the camshaft with the timing chain removed, rotate it after lowering the piston from the top dead center position.
When rotating the camshaft using a wrench on the cast hexagon, the wrench may contact the rocker arm and damage the rocker arm. To prevent damage to the rocker arm when holding the camshaft on the cast hexagon, use a wrench on the rear side of the engine as shown in the figure to secure a clearance between the cam.

Fig 1: Cautions For Rocker Arm Not Touching Wrench

Courtesy of MAZDA MOTORS CORP.

Carefully assemble the HLA because the specification is different between the intake side and the exhaust side.

NOTE:

Width at the cast hexagon of the camshaft is 22-24 mm {0.87-0.94 in}.

Fig 2: Checking Width At Cast Hexagon Of Camshaft Measurement

Courtesy of MAZDA MOTORS CORP.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Remove the ignition coil/ion sensors. (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION .)
Remove the cylinder head cover. (See TIMING CHAIN REMOVAL/INSTALLATION .)
Remove the front under cover No. 2. (See FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
Remove the front splash shield (RH). (See FRONT SPLASH SHIELD REMOVAL/INSTALLATION .)
Remove the electric variable valve timing motor/driver. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION .)
Remove the vacuum pump. (See VACUUM PUMP REMOVAL/INSTALLATION .)
Remove the high pressure fuel pump and rear housing. (See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION .)
Remove in the order indicated in the table.
Install in the reverse order of removal.
Start the engine and inspect the following:

Ignition timing, idle speed and idle mixture. (See ENGINE TUNE-UP .)

Fig 3: Exploded View Of Camshaft Components

Courtesy of MAZDA MOTORS CORP.

COMPONENT DESCRIPTION

1	Oil shower pipe (See Oil Shower Pipe Installation Note .)
2	Timing chain (See Timing Chain Removal Note .) (See Timing Chain Installation Note .)
3	Chain guide (No. 1)
4	Electric variable valve timing actuator (See Electric Variable Valve Timing Actuator Removal Note .) (See Electric Variable Valve Timing Actuator Installation Note .)
5	OCV
5	Camshaft (See Camshaft Removal Note .) (See Camshaft Installation Note .)
7	OCV oil filter
8	Rocker arm (See Rocker Arm Removal Note .) (See Rocker Arm Installation Note .)
9	HLA (See HLA Removal Note .) (See HLA Installation Note .)