Mazda engine MZR–CD. Manual - part 16

B–44

ENGINE 

Seal Plate Assembly Note

1. Install the seal plate and hand tighten the bolts in 

the order A to B.

2. Tighten the bolts in the order shown.

Camshaft Pulley Assembly Note

1. Hold the camshaft using the SST.

2.

Gear Case Assembly Note

1. Apply silicone sealant as shown in the figure.

Thickness

1.5—2.5 mm {0.059—1.098 in}

2. Tighten the bolts in clockwise order.

Drive Gear Assembly Note

1. Hold the camshaft using the SST.
2. Remove the drive gear lock bolt.

AME2516E004

AME2524E009

AME2524E011

AME2524E008

ENGINE 

B–45

B

Gear Cover Assembly Note

1. Apply silicone sealant as shown in the figure.

Thickness

1.5—2.5 mm {0.059—1.098 in}

2. Tighten the bolts in clockwise order.

Timing Belt Pulley Assembly Note

1. Hold the crankshaft using the SST.
2. Tighten the timing belt pulley lock bolt.

Injection Pump Pulley Assembly Note

Caution

••••

To prevent the bolts (M8 x 1.25) from damaging the injection pump and pulley, do not fully tighten 
the detent bolt. If it contacts the pulley surface, it will damage the pulley.

1. Fix the injection pump pulley to the bracket using 

two bolts (M8 x 1.25).

AME2524E012

AME2524E065

AME2524E005

B–46

ENGINE 

Idler Assembly Note

Caution

••••

The idler has a front and back relative to 
the engine, therefore when installing 
make sure that the longer projection of 
the shaft is on the engine side as 
indicated in the figure.

Timing Belt, Timing Belt Auto Tensioner Assembly Note

Caution

••••

Placing the auto tensioner horizontally can cause oil leakage and damage the auto tensioner. 
Place the auto tensioner vertically when using a vise.

1. Verify the thrust of the auto tensioner rod in the following order:

(1) If the tensioner rod is rigid when it is pushed 

with a force of approximately 235 N {24 kgf, 
53 lbf}, push it down slowly and fix the pin in 
the hole.

(2) If there is no resistance on the tensioner rod 

and it moves slightly when it is pushed with a 
force of approximately 235 N {24 kgf, 53 Ibf};

Caution

••••

To prevent damage to the inside of the 
auto tensioner, do not press down the 
auto tensioner rod with a force greater 
than the specified 235 N {24 kgf, 53 lbf}. 
Be careful that the rod does not touch the 
bottom.

1) Push it down slowly two or three times to 

the bottom end of the rod.

2) If the rod protrudes approximately 8.1 mm 

{0.32 in}, verify that there is resistance on 
the tensioner rod.

•

If the resistance is restored, push it 
down slowly and fix the pin in the 
hole. If the resistance is not restored, 
replace the auto tensioner.

Caution

••••

To prevent the bolts (M8 x 1.25) from damaging the injection pump and pulley, do not fully tighten 
the detent bolt. If it contacts the pulley surface, it will damage the pulley.

2. Verify that all timing marks are correctly aligned.
3. Fix the camshaft pulley to the cylinder head using bolt (M8 x 1.25).

AME2524E099

AME2516E005

ENGINE 

B–47

B

4. Fix the injection pump pulley to the bracket using 

two bolts (M8 x 1.25).

5. If not, align all timing marks according to the 

following procedure.

Caution

••••

Turn the crankshaft in the direction 
which will prevent the TDC and BDC from 
being passed. Otherwise it can cause the 
valve and piston to contact.

(1) Turn the crankshaft and set it an angle of 45

°

 

or more away from the TDC and BDC.

(2) Align the timing marks of the camshaft pulley.
(3) Align the timing marks of the injection pump pulley.
(4) Turn the crankshaft and align the timing marks of the timing belt pulley.

6. Install the timing belt on the pulleys in the 

following order.
(1) Timing belt pulley
(2) Idler
(3) Injection pump pulley
(4) Camshaft pulley
(5) Water pump pulley
(6) Tensioner

7. Remove the injection pump pulley fixing bolts and 

camshaft pulley fixing bolt (M8 x 1.25).

8. Hand–tighten the auto tensioner bolts in the order 

A to B.

9. Tighten the auto tensioner bolts in the order A to 

B.

10. Remove the pin from the auto tensioner to apply 

tension to the belt.

11. Turn the crankshaft clockwise twice, and align the 

timing marks.

12. Verify that all timing marks are correctly aligned. If 

not, repeat from Timing Belt, Timing Belt Auto 
Tensioner Removal Note. 

AME2516E006

AME2516E007

AME2516E008