2009 CHERY TIGGO engine

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSES CORRECTION
Engine Miss On Acceleration 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
7. Burned, warped, excessive
clearance, or pitted valves.
4. Faulty ignition coil(s).1. Clean spark plugs and set gap.
2. Clean fuel system and replace
fuel filter.
3. Replace valves.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Miss At High Speed 1. Dirty or incorrect spark plug gap.
2. Faulty ignition coil(s).
3. Dirty fuel injector(s).
4. Contamination in fuel system.1. Clean spark plugs and set gap.
2. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Clean system and replace fuel
filter.
Engine Mechanical Diagnostics
CONDITION
POSSIBLE CAUSES CORRECTION
Valve Train Noise 1. High or low oil level in crankcase.
2. Thin or diluted oil.
3. Thick oil.
4. Low oil pressure.
5. Worn cam lobe.
6. Worn valve guides.
7. Excessive runout of valve seats
on valve faces.1. Check and correct engine oil
level.
2. Change oil to correct viscosity.
3. Change engine oil and filter.
4. Check and correct engine oil
level.
5. Install new camshaft.
6. Replace cylinder head.
7. Grind valve seats and replace
valves.
Connecting Rod Noise 1. Insufficient oil supply.
2. Low oil pressure.
3. Thin or diluted oil.
4. Excessive bearing clearance.
5. Connecting rod journal out-of-
round.
6. Connecting rod out-of-round.
7. Misaligned connecting rods.
8. Connecting rod nuts loose.1. Check engine oil level.
2. Check engine oil level. Inspect oil
pump relief valve and spring.
3. Change oil to correct viscosity.
4. Measure bearings for correct
clearance. Repair if necessary.
5. Replace crankshaft or grind
surface.
6. Replace connecting rod.
7. Replace bent connecting rods.
8. Tighten the connecting rod nuts.
Main Bearing Noise 1. Insufficient oil supply.
2. Low oil pressure.
3. Thin or diluted oil.
4. Excessive bearing clearance.
5. Excessive end play.
6. Crankshaft journal out-of-round or
worn.
7. Loose flywheel or torque
converter.1. Check engine oil level.
2. Check engine oil level. Inspect oil
pump.
3. Change oil to correct viscosity.
4. Measure bearings for correct
clearance. Repair if necessary.
5. Check thrust bearing for wear on
flanges.
6. Replace crankshaft or grind
journals.
7. Tighten to correct torque.
DIAGNOSIS & TESTING
02–164Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSES CORRECTION
Oil Pressure Drop 1. Low oil level.
2. Faulty oil pressure sending unit.
3. Low oil pressure.
4. Clogged oil filter.
5. Thin or diluted oil.
6. Excessive bearing clearance.1. Check engine oil level.
2. Install new sending unit.
3. Check sending unit and main
bearing oil clearance.
4. Install new oil filter.
5. Change oil to correct viscosity.
6. Measure bearings for correct
clearance.
Oil Leaks 1. Misaligned or deteriorated
gaskets.
2. Loose fastener, broken or porous
metal part.
3. Misaligned or deteriorated cup or
threaded plug.1. Replace gasket.
2. Tighten, repair or replace the part.
3. Replace if necessary.
Oil Consumption Or Spark Plugs
Fouled 1. PCV system malfunction.
2. Worn, scuffed or broken rings.
3. Carbon in oil ring slots.
4. Rings fitted too tightly in grooves.
5. Worn valve guide(s).
6. Valve stem seal(s) worn or
damaged.1. Check system and repair if
necessary.
2. Hone cylinder bores. Install new
rings.
3. Install new rings.
4. Remove rings and check grooves.
If groove is not proper width, replace
piston.
5. Replace cylinder head.
6. Replace seal(s).
Cylinder Compression Pressure Test
•
The result of a cylinder compression pressure test
can be utilized to diagnose several engine malfunc-
tions.
• Ensure the battery is completely charged and the
engine starter motor is in good operating condition.
Otherwise the indicated compression pressures
may not be valid for diagnostic purposes.
Check engine oil level and add oil if neces-
sary.
Disconnect the spark plug wires.
Remove all spark plugs from engine (as spark plugs are being removed, check electrodes for
abnormal firing indicators fouled, hot, oily,
etc.).
Record cylinder number of each spark plug for future reference.
Disconnect fuel injector electrical connectors.
Be sure throttle blade is fully open during the compression check.
Insert compression pressure adaptor or the equivalent into each spark plug hole in cylinder head.
Crank engine until maximum pressure is reached on gauge. Record each cylinder pressure.
Compression should not be less than 880 kPa and not vary more than 25 percent from cylinder to cylinder.
If one or more cylinders have abnormally low compression pressures, repeat the compression test.
If the same cylinder or cylinders repeat an abnormally low reading on the second compression test, it could indicate the existence of a problem with the cylinder in question.
NOTE :
The recommended compression pressures are to be used only as a guide to diagnosing engine problems. An engine
should not be disassembled to determine the cause of low compression unless some malfunction is present.
DIAGNOSIS & TESTING
LTSM020191
02
02–165Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Cylinder Head Gasket Test
•A cylinder head gasket leak can be located between adjacent cylinders, between a cylinder and the adjacent
water jacket or from an oil passage to the exterior of the engine.
• Possible indications of the cylinder head gasket leaking between adjacent cylinders are:
Loss of engine power
Engine misfiring
Poor fuel economy
• Possible indications of the cylinder head gasket leaking between a cylinder and an adjacent water jacket are:
Engine overheating
Loss of coolant
Excessive steam (white smoke) emitting from exhaust
Coolant foaming
Engine Oil Pressure Test
1. Check the engine oil level.
2. Disconnect the oil pressure switch electrical connector.
3. Remove the oil pressure switch.
4. Install the mechanical oil pressure gauge.
5. Start the engine and warm to normal operating temperature.
6. After the engine has been warmed up, check that the oil pressure is within the specifications. Standard Oil Pressure: At 750 ± 50 RPM: 0.8 MPa
7. Stop the engine.
8. Remove the oil pressure gauge.
9. Apply the specified sealant to the thread (1) of oil pressure switch.
10. Install the oil pressure switch (Tighten: Oil pres- sure switch to 10 ± 2 N·m).
DIAGNOSIS & TESTING
LTSM020146
02–166Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Accessory Drive Belt
Removal & Installation
WARNING!
Inspect the drive belt only when the engine is stopped.
1. Loosen the power steering pump adjustment bolt(1).
1 - Power Steering Pump
2 - Crankshaft Pulley
3 - Idler Pulley
4 - A/C Compressor5 - Coolant Pump Pulley
6 - Generator Pulley
7 - A/C Compressor Belt
8 - Generator Belt
LTSM020176
LTSM020185
02
02–167Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2. Remove the A/C compressor belt.
3. Loosen the generator adjustment bolts (1).
4. Remove the generator belt.
5. Installation is in the reverse order of removal.
Air Cleaner Element
Removal & Installation
1. Loosen the air cleaner case side clamps (1) andraise the air cleaner case (upper).
2. Remove the air cleaner element.
3. Installation is in the reverse order of removal.
ON-VEHICLE SERVICE
LTSM050004
LTSM020239
02–168Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Air Cleaner Housing
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the air flow sensor electrical connector.
3. Loosen the clamp between the air intake hose and the air cleaner.
4. Remove the retaining bolt (1), securing the aircleaner housing to its base.
(Tighten: Air cleaner housing retaining bolts to
10 N·m)
5. Remove the air cleaner housing.
6. Installation is in the reverse order of removal.
ON-VEHICLE SERVICE
LTSM020240
LTSM020160
02
02–169Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Cylinder Head Cover
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the accelerator cable bracket bolts (1).(Tighten: Accelerator cable bracket bolts to 10 N·m)
3. Remove the accelerator cable.
4. Remove the air flow hose clamp (2) and discon- nect the air flow hose.
5. Remove the spark plug wires (3) and set them aside (See Spark Plug Wire Removal & Installation
in Section 03 Electronic Engine Controls).
6. Remove the PCV tube (5).
7. Remove the cylinder head cover bolts (4). (Tighten: Cylinder head cover bolts to 11 N·m)
8. Remove the cylinder head cover from the cylinder head.
9. Remove the cylinder head cover gasket if necessary.
10. Installation is in the reverse order of removal.
NOTE :
Install a new cylinder head cover gasket during installation.
ON-VEHICLE SERVICE
LTSM020175
02–170Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Camshaft
Removal & Installation
NOTE :
The following special tools are required to perform the repair procedure:
•MD-998719 - Camshaft Belt Gear Holder
• MD-990767 - Camshaft Belt Gear Holder
• MD-998443 - Hydraulic Post Keeper
1 - Rocker Shaft Retaining Bolt
2 - Intake Rocker Arm Shaft
3 - Rocker Arm
4 - Rocker Arm
5 - Rocker Shaft Spring
6 - Hydraulic Adjuster
7 - Rocker Arm and Rocker Shaft8 - Exhaust Rocker Arm Shaft
9 - Rocker Arm
10 - Rocker Arm and Rocker Shaft
11 - Camshaft Oil Seal
12 - O-Ring
13 - Camshaft Thrust Plate
14 - Camshaft
ON-VEHICLE SERVICE
LTSM020081
02
02–171Chery Automobile Co., Ltd.