check oil CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine Voltage Drop Test
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage drop in
a circuit is caused by a resistance in the circuit during operation.
•Check the circuit using a Digital Multimeter (DMM).
• When measuring resistance with a DMM, remember that contact by a single strand of wire will give a reading
of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire is not able
to carry the current. The single strand will have a high resistance to the current. This will be indicated as a
slight voltage drop.
• Unwanted resistance can be caused by the following:
Undersized wiring (single strand example)
Corrosion on switch contacts
Loose wire connections or splices
Precautions For Handling Control Modules and Electrical Components
•Never reverse polarity of battery terminals.
• Only install components specified for the vehicle.
• Before replacing the control module, check the input and output and functions of the components.
• When disconnecting components:
Do not apply excessive force when disconnecting a connector.
If a connector is installed by tightening bolts, loosen mounting bolt, then remove it by hand.
• When connecting components:
Before installing a connector, make sure the terminal is not bent or damaged, and then correctly connect it.
When installing a connector by tightening bolts, tighten the mounting bolt until the painted area of the con-
nector becomes even with the surface.
• Do not apply excessive shock to the control module by dropping or hitting it.
• Be careful to prevent condensation in the control module due to rapid temperature changes and do not let
water or rain get on it. If water is found in the control unit, dry it fully and then install it in the vehicle.
• Be careful not to let oil get on the control module connector.
• Avoid cleaning the control module with volatile oil.
• When using a DMM, be careful not to let the test probes touch each other causing a short circuit. Prevent the
power transistor in the control module from being
shorted to damaging battery voltage.
• When checking input and output signals of the con-
trol module, use the specified test adapter (if
applicable).
DIAGNOSING ELECTRICAL FAILURES
LTSMD030028
01–18Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Engine Performance Diagnostics
CONDITIONPOSSIBLE CAUSE CORRECTION
Engine Does Not Start 1. Weak battery.
2. Corroded or loose battery
connections.
3. Faulty starter.
4. Faulty coil(s) or control unit.
5. Incorrect spark plug gap.
6. Contamination in fuel system.
7. Faulty fuel pump.
8. Incorrect timing.1. Test battery. Charge or replace if
necessary.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
3. Test starting system. Check for
codes. (Refer to Appropriate
Diagnostic Information)
4. Test and replace if needed. (Refer
to Appropriate Diagnostic
Information)
5. Set gap.
6. Clean system and replace fuel
filter.
7. Test fuel pump and replace as
needed. (Refer to Appropriate
Diagnostic Information)
8. Check for a skipped timing belt.
Engine Stalls Or Idles Rough 1. Idle speed too low.
2. Incorrect fuel mixture.
3. Intake manifold leakage.
4. Faulty ignition coil(s).1. Test minimum air flow. (Refer to
Appropriate Diagnostic Information)
2. (Refer to Appropriate Diagnostic
Information)
3. Inspect intake manifold, manifold
gasket, and vacuum hoses.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Loss Of Power 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
3. Faulty fuel pump.
4. Incorrect valve timing.
5. Leaking cylinder head gasket.
6. Low compression.
7. Burned, warped, excessive
clearance, or pitted valves.
8. Plugged or restricted exhaust
system.
9. Faulty ignition coil(s).
10. Burned spark plugs.1. Clean spark plugs and set gap.
2. Clean system and replace fuel
filter.
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each
cylinder.
7. Replace valves.
8. Perform exhaust restriction test.
Install new parts.
9. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
10. Replace spark plugs.
DIAGNOSIS & TESTING
02
02–13Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSE 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 CAUSE 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
02–14Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSE 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).
DIAGNOSIS & TESTING
02
02–15Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Cylinder Compression Pressure Test
•The result of a cylinder compression pressure test can be utilized to diagnose several engine malfunctions.
• 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 necessary.
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 1000 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.
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
DIAGNOSIS & TESTING
02–16Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ENGINE UNIT REPAIR
Engine Block
Specifications
Torque Specifications
DESCRIPTIONTORQUE (N·m)
Connecting Rod Cap Bolts 1st Step: Tighten the bolt to 25 N·m
2nd Step: Tighten the bolt an additional 90°
Main Bearing Cap Bolts 1st Step: Tighten the bolt to 45 N·m
2nd Step: Tighten the bolt an additional 180°
Lower Cylinder Block Bolts 23
Clearance Specifications
DESCRIPTIONSPECIFICATION (mm)
Surface Distortion Limit 0.15
Inner Diameter Standard 81
Out-Of-Round < 0.008
Taper < 0.01
Disassembly
1. Remove the oil pan and then remove oil baffle.
2. Remove the oil strainer.
3. For each connecting rod/piston assembly to be removed, rotate the crankshaft to the bottom dead center position
for each cylinder.
NOTE :
Before removing the connecting rod/piston assembly, check the connecting rod side clearance.
BESM020060
02–50Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8. Installation is in the reverse order of removal.
Inspection
NOTE :
All measurements should be taken with the engine block at room temperature, 21°C.
Engine Block
•Clean cylinder block thoroughly and check all core hole plugs for evidence of leaking.
• Examine block and cylinder bores for cracks or fractures.
• Check block deck surfaces for flatness. Deck surface must be within service limit of 0.050 mm.
Cylinder Bore
• The cylinder walls should be checked for out-of-round and taper with cylinder indicator or equivalent. If the cyl-
inder walls are badly scuffed or scored, the cylinder block should be replaced, and new pistons and rings fitted.
• Measure the cylinder bore at three levels in directions X and Y. Top measurement should be 10 mm down and
bottom measurement should be 10 mm up from
bottom of bore.
CYLINDER BORE
All Cylinders 81.000 - 81.010 mm
Assembly
NOTE :
Cleanliness is extremely important during the engine assembly procedure. Any foreign material, including any mate-
rial created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan can cause
engine failure.
NOTE :
Assemble all components in their original position.
1. Install the pistons to the connecting rods.
2. Using a piston ring expander, install the piston rings.
3. Assemble all components in the reverse order of disassembly.
ENGINE UNIT REPAIR
BESM020063
02–52Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Disassembly
•Piston Ring Removal
Using a suitable ring expander, remove upper
and intermediate piston rings.
Remove the upper oil ring side rail, lower oil ring side rail and then oil ring expander from
piston.
Clean ring grooves of any carbon deposits.
CAUTION:
Before removing the piston rings (1), check the
piston ring side clearance. Be careful to mark
the location of the piston rings if they are to
be reused.
• Piston Pin Snap Ring Removal
Using snap ring pliers, remove the snap ring
(1).
Heat the pistons if necessary.
ENGINE UNIT REPAIR
BESM020047
BESM020046
BESM020048
02–54Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check the inner diameter of each cylinder bore (See
Cylinder Bore Inspection in Section 02 Engine).
CYLINDER BORE
All Cylinders 81.000 - 81.010 mm
Check piston ring to groove side clearance.
• Clean the ring slot using a suitable tool.
• Measure piston ring to groove side clearance.
RING GROOVE CLEARANCE
First Ring 0.04 - 0.08 mm
Second Ring 0.01 - 0.0251 mm
• Wipe the cylinder bore clean. Insert ring and push down with piston to ensure it is square in the bore. The ring
gap measurement must be made with the ring posi-
tioned at least 13 mm from bottom of cylinder bore
and below the bottom of the oil ring travel where
the cylinder bore has minimal wear. Check gap with
feeler gauge.
ENGINE UNIT REPAIR
BESM020063
BESM020051
BESM020052
02–56Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. Remove the connecting rod bearings.CAUTION: When removing the connecting rod
side bearings, note the installation position.
Keep them in the correct order.
Inspection
•Check the radial clearance of connecting rod bearing.
CONNECTING ROD RADIAL CLEARANCE
Radial Clearance 0.016 - 0.051 mm
Assembly
NOTE :
The rod bolts should not be reused.
1. Before installing the NEW rod bolts, the threads and under the bolt head should be oiled with clean engine oil.
2. Install each bolt finger tight, then alternately tighten each bolt to assemble the cap properly.
3. Tighten the connecting rod bolts using the two step torque-turn method:• 1st Step: Tighten bolts to 25 N·m
• 2nd Step: Tighten the connecting rod bolts an
additional 90°
4. Using a feeler gauge check connecting rod side clearance. •Check axial clearance of connecting rod.
ENGINE UNIT REPAIR
BESM020045
LTSM020208
BESM020064
02
02–59Chery Automobile Co., Ltd.