Mazda Engine LF, L3. Manual - part 10

MECHANICAL

01–10–23

01–10

End Of Sie

VALVE CLEARANCE ADJUSTMENT

E5U011012111E04

1. Remove the engine front cover lower blind plug.
2. Remove the engine front cover upper blind plug.
3. Remove the cylinder block lower blind plug.

4. Install the SST as shown in the figure.

Caution

• Removal of this SST is extremely

important. If you crank the engine with
this SST installed, the cylinder block will
be damaged.

5. Turn the crankshaft clockwise so that the

crankshaft is in the No.1 cylinder TDC position.

6. Loosen the timing chain.

(1) Using a suitable screwdriver or equivalent

tool, unlock the chain tensioner ratchet.

(2) Turn the exhaust camshaft clockwise using a

suitable wrench on the cast hexagon and
loosen the timing chain.

(3) Placing the suitable bolt (M6

× 1.0 Length

25—35 mm {0.9—1.3 in}) at the engine front
cover upper blind plug, secure the chain guide
at the position where the tension is released.

UPPER
BLIND
PLUG

LOWER BLIND
PLUG

B3E0110E093

303-507

D3U110ZE4006

BOLT (M6 x 1.0)

B3E0110E096

MECHANICAL

01–10–24

7. Hold the exhaust camshaft using a suitable

wrench on the cast hexagon as shown in the
figure.

8. Remove the exhaust camshaft sprocket.

9. Loosen the camshaft cap bolts in several passes

in the order shown in the figure.

Note

• The cylinder head and the camshaft caps

are numbered to make sure they are
reassembled in their original position. When
removed, keep the caps with the cylinder
head they were removed from. Do not mix
the caps.

10. Remove the camshaft.
11. Remove the tappet.
12. Select proper adjustment shim.

New adjustment shim

= Removed shim thickness + Measured valve clearance - Standard valve clearance (IN: 0.25 mm

{0.0098 in}, EX: 0.30 mm {0.0118 in})

Valve clearance [Engine cold]

IN: 0.22—0.28 mm {0.0087—0.0110 in}
EX: 0.27—0.33 mm {0.0106—0.0130 in}

13. Install the camshaft with No.1 cylinder aligned with the TDC position.
14. Tighten the camshaft cap bolt using the following

two steps.

Tightening torque

(1) 5.0—9.0 N·m

{51.0—91.7 kgf·cm, 44.3—79.5 in·lbf}

(2)14.0—17.0 N·m

{1.43—1.73 kgf·m, 10.4—12.5 ft·lbf}

B3E0110E095

EXHAUST
CAMSHAFT
SPROCKET

B3E0110E097

B3E0110E057

B3E0110E098

MECHANICAL

01–10–25

01–10

Engine Workshop Manual LF L3 (1866–1U–05H)

Revised 12/2005 (Ref. No. R145/05)

15. Install a new washer.

16. Install the exhaust camshaft sprocket.

Note

• Do not tighten the bolt for the camshaft

sprocket during this step. First confirm the
valve timing, then tighten the bolt.

17. Install the SST to the camshaft as shown in the

figure.

18. Remove the M6

× 1.0 bolt from the engine front

cover to apply tension to the timing chain.

19. Turn the crankshaft clockwise so that the

crankshaft is in the No.1 cylinder TDC position.

20. Hold the exhaust camshaft using a suitable

wrench on the cast hexagon as shown in the
figure.

21. Tighten the exhaust camshaft sprocket lock bolt.

Tightening torque

69—75 N·m {7.1—7.6 kgf·m, 50.9—55.3 ft·lbf}

22. Remove the SST from the camshaft.
23. Remove the SST from the block lower blind plug.
24. Rotate the crankshaft clockwise two turns until

the TDC position.

• If not aligned, loosen the camshaft sprocket

lock bolt and repeat from Step 17.

D3U110ZE4012

EXHAUST
CAMSHAFT
SPROCKET

B3E0110E097

303-465

(49 UN30 3465)

C3U0110E066

B3E0110E095

MECHANICAL

01–10–26

Engine Workshop Manual LF L3 (1866–1U–05H)

25. Install the new engine front cover upper blind

plug.

Tightening torque

8.0—11.5 N·m {82—117 kgf·cm, 71—101

in·lbf}

26. Install the cylinder block lower blind plug.

Tightening torque

18—22 N·m {1.9—2.2 kgf·m, 13.3—16.2 ft·lbf}

27. Install the new engine front cover lower blind plug.

Tightening torque

10—14 N·m {102—142 kgf·cm, 89—123

in·lbf}

End Of Sie

BLIND
PLUG

B3E0110E101

BLIND
PLUG

B3E0110E102

ENGINE FRONT
COVER LOWER
BLIND PLUG

B3E0110W063

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