Engine Mechanical [MZI-3.7]: Other Mazda CX-9 I рестайлинг

ENGINE TUNE-UP [MZI-3.7]

Note. If the accelerator pedal is depressed continuously for a specified time, the engine speed may decrease to the idle speed. This is due to the fuel cut control operation, which prevents overheating, and it does not indicate a malfunction.

Scheme 122

1. Verify that the selector lever is in the P position.
2. Connect the M-MDS to the DLC-2.
3. Turn off the electrical loads.
4. Verify that no DTCs are available.
5. Warm up the engine as follows. Start the engine. Perform no-load racing at 2,500-3,000 rpm for 3 min. (ECT is approx. 80 °C {176 °F} or more) Release the accelerator pedal. Wait until the cooling fans stop.

Generator and A/C Drive Belt

Note. The generator and A/C drive belt deflection/tension inspection is not necessary because of the use of the drive belt auto tensioner.

Scheme 123

1. Verify that the drive belt auto tensioner indicator mark does not exceed the maximum belt length. If it exceeds the maximum belt length, replace the generator and A/C drive belt. (See «DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S20413559332014101600000) .)
2. Visually inspect the generator and A/C drive belt for damage and cracks. If there is generator and A/C drive belt damage and cracks, replace the generator and A/C drive belt. (See «DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S20413559332014101600000) .)

Power Steering Oil Pump Drive Belt

1. Visually inspect the power steering oil pump drive belt for damage and cracks. If there is power steering oil pump drive belt damage and cracks, replace the power steering oil pump drive belt. (See «DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S20413559332014101600000) .)

Note. When removing the generator and A/C drive belt, perform the procedure with two people, one releasing the belt tension and the other removing the belt.

Scheme 124

Scheme 125

1. Remove the engine cover. (See «ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S15271151742014101600000) .)
2. Remove the front wheel and tire (RH). (See GENERAL PROCEDURES (SUSPENSION) article.)
3. Remove the splash shield (RH).
4. Set a breaker bar on the center of the tensioner pulley as shown in illustration below.
5. Using the breaker bar, turn the center of the tensioner pulley clockwise to release the tension on the generator and A/C drive belt.
6. Remove the generator and A/C drive belt.
7. Install the generator and A/C drive belt. NOTE: When the generator and A/C drive belt is replaced with a new one, the drive belt auto tensioner indicator mark is aligned with the nominal belt length mark.
8. Verify that the drive belt auto tensioner indicator mark is within the maximum and minimum belt length. (See «DRIVE BELT INSPECTION [MZI-3.7]»(ref-663015-S40499803102014101600000) .) If the drive belt auto tensioner indicator mark is not within the limit, replace the generator and A/C drive belt.
9. Install the splash shield (RH).
10. Install the front wheel and tire (RH). (See GENERAL PROCEDURES (SUSPENSION) article.)
11. Install the engine cover. (See «ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S15271151742014101600000) .)

Scheme 126

Scheme 127

Scheme 128

Scheme 129

1. Remove the generator and A/C drive belt. (See «GENERATOR AND A/C DRIVE BELT»(ref-663015-S25064964302014101600000) .)
2. Remove the power steering oil pump drive belt. Install the SST between the power steering oil pump drive belt and the power steering oil pump pulley. NOTE: Hold the SST by hand until it is lodges between the power steering oil pump pulley and power steering oil pump drive belt. Turn the crankshaft clockwise to remove the power steering oil pump drive belt. NOTE: If there is power steering oil pump drive belt damage and cracks, replace the power steering oil pump drive belt.
3. Install the power steering oil pump drive belt. Install the SST according to the following steps. Loosen the clamp adapter nut of the SST. NOTE: There is no need to remove the clamp adapter nut completely when positioning the SST on the power steering oil pump pulley. Position the SST on the power steering oil pump pulley with the clamp adapter in one of the holes of the pulley. Tighten the clamp adapter nut by hand. NOTE: Hand tightening of the clamp adapter nut is sufficient. Position the power steering oil pump drive belt around the SST and the power steering oil pump pulley. NOTE: Hold the SST and power steering oil pump drive belt by hand until the power steering oil pump drive belt is properly seated. Turn the crankshaft clockwise to install the power steering oil pump drive belt. NOTE: Verify that the power steering oil pump drive belt is firmly attached to the pulleys.
4. Install the generator and A/C drive belt. (See «GENERATOR AND A/C DRIVE BELT»(ref-663015-S25064964302014101600000) .)
5. Verify that the drive belt auto tensioner indicator mark does not exceeds the maximum belt length. (See «DRIVE BELT INSPECTION [MZI-3.7]»(ref-663015-S40499803102014101600000) .) If it exceeds the maximum belt length, replace the generator and A/C drive belt.

Scheme 130

Scheme 131

1. Remove the engine cover. (See «ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S15271151742014101600000) .)
2. Remove the front wheel and tire (RH). (See GENERAL PROCEDURES (SUSPENSION) article.)
3. Remove the splash shield (RH).
4. Remove the generator and A/C drive belt. (See «DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S20413559332014101600000) .)
5. Verify that the drive belt auto tensioner moves smoothly in the operational direction. Replace the drive belt auto tensioner if necessary. Tightening torque 8.9-12.1 N.m {91-123 kgf.cm, 79-107 in.lbf}
6. Turn the drive belt auto tensioner pulley by hand and verify that it rotates smoothly. Replace the drive belt auto tensioner if necessary. Tightening torque 8.9-12.1 N.m {91-123 kgf.cm, 79-107 in.lbf}
7. Install in the reverse order of removal.

Scheme 132

Scheme 133

Scheme 134

1. Disconnect the negative battery cable.
2. Remove the engine cover. (See «ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S15271151742014101600000) .)
3. Remove the ventilation hose.
4. Remove the resonance chamber. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7]»(ref-663036-S20639303202014101600000) article.)
5. Remove the dynamic chamber and throttle body as a single unit. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7]»(ref-663036-S20639303202014101600000) article.)
6. Disconnect the wiring harness.
7. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZI-3.7] article.)
8. Remove the dipstick.
9. Remove the cylinder head cover. (See «TIMING CHAIN REMOVAL/INSTALLATION [MZI-3.7]»(ref-663015-S39772852162014101600000) .)
10. Remove the front wheel and tire (RH). (See GENERAL PROCEDURES (SUSPENSION) article.)
11. Remove the splash shield (RH).
12. Measure the valve clearance. Rotate the crankshaft clockwise and verify that the timing mark of the intake side camshaft sprocket is in the position shown in the figure below. In this position, the No. 1 cylinder is at the TDC of the compression stroke. Measure the valve clearance of location A shown in the figure below. If it is not within the Specifications, replace the tappet and adjust the valve clearance to the median value of the standard. Standard valve clearance [Engine cold] IN: 0.150-0.250 mm {0.00591-0.00984 in} EX: 0.300-0.400 mm {0.0119-0.0157 in} NOTE: Make sure to note down the measured values for choosing the suitable replacement tappets. Mark the crank pulley and engine front cover as shown in the figure below. Rotate the crankshaft clockwise 360 ° so that the No. 5 cylinder is at TDC of the compression stroke. Measure the valve clearance of location B shown in the figure. If it is not within the Specifications, replace the tappet and adjust the valve clearance to the median value of the standard. Standard valve clearance [Engine cold] IN: 0.150-0.250 mm {0.00591-0.00984 in} EX: 0.300-0.400 mm {0.0119-0.0157 in} NOTE: Make sure to note down the measured values for choosing the suitable replacement tappets.
13. Install in the reverse order of removal.