- Disconnect the negative battery cable, and drain the cooling system.
CAUTION
Never open, service or drain the radiator or cooling system when hot; serious
burns can occur from the steam and hot coolant. Also, when draining engine
coolant, keep in mind that cats and dogs are attracted to ethylene glycol
antifreeze and could drink any that is left in an uncovered container or
in puddles on the ground. This will prove fatal in sufficient quantities.
Always drain coolant into a sealable container. Coolant should be reused
unless it is contaminated or is several years old.
- Remove the timing belt covers.
- Remove the upper idler pulley.
- Turn the crankshaft to align the matching marks on the sprockets. If the
timing belt is to be reused, draw an arrow on the belt to indicate rotation
direction.
- Remove the timing belt and automatic tensioner.
- Using SST 49-H012-010 tool or its equivalent, loosen and remove the camshaft
sprocket lockbolts. Remove the camshaft sprockets.
- Using a suitable puller, remove the crankshaft sprocket.
| Fig. 1: Timing belt routing and timing mark locations — Mazda
MPV 3.0L (VIN JE) engine
|
To install:
- Install the crankshaft sprocket on the crankshaft.
- Install the camshaft sprockets with the lockbolts and tighten the bolts
to 52–59 ft. lbs. (71–80 Nm).
- Set a plain washer at the bottom of the tensioner body to prevent damage
to the body plug. Press in the tensioner rod slowly, using a press or a vise.
NOTE: Do not press the tensioner rod with more than 2200
lbs. (9800 N).
- Insert a pin to hold the tensioner rod in the body. Install the automatic
tensioner and tighten the mounting bolts to 14–19 ft. lbs. (19–25
Nm).
- Install the crankshaft pulley lockbolt and loosely tighten. Check the alignment
of the matching marks on the sprockets.
- With the upper idler pulley removed, install the timing belt, making sure
there is no slack between the crankshaft and camshaft sprockets. If the timing
belt is being reused, it must be installed in the same direction of rotation.
- Install the upper idler pulley and tighten the attaching bolt to 27–38
ft. lbs. (37–52 Nm).
- Turn the crankshaft twice in the direction of rotation (clockwise) and align
the matching marks. If the marks do not align, repeat the previous 3 steps.
WARNING
If any binding is felt when adjusting the timing belt tension by turning
the crankshaft,
STOP turning the engine, because the pistons may be hitting
the valves.
- Remove the pin from the automatic tensioner. Turn the crankshaft twice and
align the matching marks. Be sure the marks are aligned.
- Check the timing belt deflection. The deflection should be 0.20–0.28
in. (5–7mm). Do not apply tension other than that of the automatic tensioner.
- If the deflection is not correct, repeat the previous 3 steps.
- Remove the crankshaft pulley lockbolt.
- Install the timing belt cover, along with the related components.
- Reinstall the crankshaft pulley and tighten the lockbolt to 116–123
ft. lbs. (37–52 Nm).
- Fill and bleed the cooling system.
- Run the engine and check for leaks and proper operation. Check the idle
speed and the ignition timing.
