Timing Chain Removal/Installation: Notes

Special Service Tool (SST)

Mazda SST number Global SST number
1: 49 UN30 3050 2: 303-050 Engine lifting bracket	Courtesy of MAZDA MOTORS CORP.	1: 49 C017 5A0 2: - Engine support set	Courtesy of MAZDA MOTORS CORP.

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: Rotating Camshaft Using Wrench

Courtesy of MAZDA MOTORS CORP.

NOTE:

Fig 2: Identifying Camshaft Cast Hexagon Dimension

Courtesy of MAZDA MOTORS CORP.

Disconnect the negative battery terminal. (Refer to NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (Refer to PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Remove the ignition coil/ion sensors. (Refer to IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION .)
Remove the front under cover No. 2. (Refer to FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
Remove the front splash shield (RH). (Refer to FRONT SPLASH SHIELD REMOVAL/INSTALLATION .)
Remove the drive belt. (Refer to DRIVE BELT REMOVAL/INSTALLATION .)
Drain the engine oil. (Refer to ENGINE OIL REPLACEMENT .)
Remove the oil pan. (Refer to OIL PAN REMOVAL/INSTALLATION .)
Remove in the order indicated in the table.
Install in the reverse order of removal.
Refill with the specified type and amount of the engine oil. (Refer to ENGINE OIL REPLACEMENT .)
Start the engine and inspect the following:
- Leakage of engine oil.
- Runout and contact of pulley and belt.
- Ignition timing, idle speed and idle mixture. (Refer to ENGINE TUNE-UP .)

U.S.A. and CANADA

Fig 3: Identifying Timing Chain Components With Torque Specifications (USA And Canada)

Courtesy of MAZDA MOTORS CORP.

Except U.S.A. and CANADA

Fig 4: Identifying Timing Chain Components With Torque Specifications (Except USA And Canada)

Courtesy of MAZDA MOTORS CORP.

COMPONENT DESCRIPTION

1	Dipstick
2	Cylinder head cover (See Cylinder Head Cover Removal Note .) (See Cylinder Head Cover Installation Note .)
3	Oil shower pipe (See Oil Shower Pipe Installation Note .)
4	Drive belt auto tensioner
5	Crankshaft pulley lock bolt (See FRONT OIL SEAL REPLACEMENT .)
6	Crankshaft pulley
7	Front oil seal (See FRONT OIL SEAL REPLACEMENT .)
8	No. 3 engine mount (See No. 3 Engine Mount Removal Note .)
9	Electric variable valve timing motor/driver (See Electric Variable Valve Timing Motor/Driver Installation Note .)
10	Engine front cover (See Engine Front Cover Removal Note .) (See Engine Front Cover Installation Note .)
11	Chain tensioner (See Timing Chain Removal Note .)
12	Tensioner arm (See Timing Chain Removal Note .) (See Timing Chain Installation Note .)
13	Chain guide (No. 1) (See Timing Chain Removal Note .) (See Timing Chain Installation Note .)
14	Timing chain (See Timing Chain Removal Note .) (See Timing Chain Installation Note .)
15	Chain guide (No. 2)
16	Crankshaft sprocket
17	Oil pump chain tensioner (See Oil Pump Chain Removal Note .) (See Oil Pump Chain Installation Note .)
18	Balancer shaft sprocket (See Oil Pump Chain Removal Note .) (See Oil Pump Chain Installation Note .)
19	Oil pump chain (See Oil Pump Chain Removal Note .) (See Oil Pump Chain Installation Note .)
20	Oil pump driven sprocket (See Oil Pump Chain Removal Note .) (See Oil Pump Chain Installation Note .)
21	Oil pump chain guide
22	Oil pump drive sprocket
23	Key