low oil pressure CHERY TIGGO 2009 Service User Guide

Downloaded from www.Manualslib.com manuals search engine 14.Disconnectandremovethefollowingelectricalconnectors:
€Coolanttemperaturesensor
€Camshaftpositionsensor
€Ignitioncoil
€Fourfuelinjectors
€Intakemanifoldairpressuresensor(1.6L)
€Airflowsensor(1.8L)
€Carboncanistersolenoidvalve
€Throttlebodycontrol
€A/Ccompressor
€Oilpressuresensor
€Powersteeringpumppressureswitch
€Generator
15.Removethepipefromthecanistercontrolvalve
(1).
16.Disconnecttheheaterhoses(1)onthevehicle.
17.Removethevacuumlinefromthebrakebooster
(2).
18.Removethedipstick.
19.Ifequippedwithamanualtransaxleremovethe
transaxleshiftcable(1).
ON-VEHICLESERVICE
LTSM020235
BESM020025
BESM080051
02
02–33CheryAutomobileCo.,Ltd.

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
The 2.0L in-line four cylinder engine has the following features:
•Dual overhead camshafts
• Four valves per cylinder
• Aluminum cylinder head
• Aluminum cylinder block
Operation
The 2.0L engine utilizes 4 valve-per-cylinders and a dual overhead camshaft design. The engine uses an individual
coil ignition system. The cylinder block is made of aluminum and the bearing caps are integrated into the lower cyl-
inder block assembly. An aluminum oil pan bolts to the bottom of the lower cylinder block. The camshafts are
mounted in the cylinder head and act against valve tappets to open and close the valves. The camshafts are driven
off the front of the cylinder head by one timing belt. The belt is driven by a sprocket that is located on the crankshaft.
The piston assembly is an aluminum piston with a cast iron connecting rod.
The aluminum cylinder head contains dual overhead camshafts with 4 valve-per-cylinder construction. The valves are
arranged in two in-line banks. The cylinder head incorporates powdered metal valve guides and seats. The cylinder
head is sealed to the block using a multi-layer steel head gasket and retaining bolts.
Specifications
2.0L Engine Specifications
DESCRIPTION SPECIFICATION
Type In-Line OHV, DOHC
Number of Cylinders 4
Compression Ratio 10:1
Compression Pressure 10 - 15 bar
Max. Compression Pressure Variation Between
Cylinders 25%
Stroke 90 mm
Bore 83.5 mm
Displacement 1971 cc
Firing Order 1-3-4-2
Mechanical Specifications
DESCRIPTIONITEMSTANDARD LIMIT
Engine Oil Pressure Lower Idle Speed (800 ±
50 RPM) 1.2 - 1.5 bar
-
High Idle Speed (2000 RPM) 3.2 - 3.5 bar
-
High Speed (4000 RPM) 3.7 ± 0.5 bar -
Engine Block Clearance Surface Distortion
-0.15 mm
Inner Diameter 83.500 - 83.510 mm -
Out-Of-Round -< 0.008 mm
Taper -< 0.01 mm
Piston Ring Groove
Clearance First Ring
0.04 - 0.08 mm -
Second Ring 0.0251 - 0.01 mm -
02
02–77Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Engine Hoist
Flywheel FixtureCH-20043
Oil Filter Remover CH-10003
Lubrication System
The engine lubrication system operates as follows:
•Oil is drawn into the oil pump through the oil pump strainer tube in the sump of the oil pan.
• Oil is pumped through the oil filter on the cylinder block.
• Oil enters the main oil gallery where it is distributed to the crankshaft main journals and to the cylinder head.
• From the main journals, the oil is routed through cross-drilled passages in the crankshaft to lubricate the con-
necting rod bearings. Controlled leakage through the crankshaft main bearings and connecting rod bearings is
slung radially outward to cool and lubricate the cylinder walls as well as the entire connecting rod, piston and
piston ring assembly.
• The engine lubrication system is a full-flow filtration, pressure feed type. The oil pump body is mounted to the
engine block. The pump inner rotor is driven by the crankshaft.
Engine Oil Pressure Specifications
Lower Idle Speed (800 ± 50 RPM) 1.2 - 1.5 bar
High Idle Speed (2000 RPM) 3.2 - 3.5 bar
High Speed (4000 RPM) 3.7 ± 0.5 bar
GENERAL INFORMATION
02–84Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Engine Oil Flow Diagram
1 - Oil Pump Strainer
2 - Baffle Plate
3 - Oil Pan
4 - Oil Pump
5 - Turbocharger Inlet Oil Passage (if equipped)
6 - To Cylinder Head
7 - Oil Return Passage
8 - To Front Bearing Cap9 - To Middle Bearing Cap
10 - Oil Dipstick
11 - To Crankcase
12 - Crankcase Pipe
13 - Oil Filter Bracket
14 - Oil Pressure Switch
15 - Oil Cooler
16 - Oil Filter
GENERAL INFORMATION
BESM020088
02–86Chery 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
02–88Chery 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
02–89Chery 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
02–90Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 13.Disconnectandremovethefollowingelectricalconnectors:
€Coolanttemperaturesensor
€Camshaftpositionsensor
€Ignitioncoil
€Fourfuelinjectors
€Intakemanifoldairpressuresensor(1.6L)
€Airflowsensor(1.8L)
€Carboncanistersolenoidvalve
€Throttlebodycontrol
€A/Ccompressor
€Oilpressuresensor
€Powersteeringpumppressureswitch
€Generator
14.Removethepipefromthecanistercontrolvalve
(1).
15.Disconnecttheheaterhoses(1)onthevehicle.
16.Removethevacuumlinefromthebrakebooster
(2).
17.Removethedipstick.
18.Ifequippedwithamanualtransaxleremovethe
transaxleshiftcable(1).
19.Removethehydraulicpipefromtheclutchslave
cylinder.
ON-VEHICLESERVICE
LTSM020235
BESM020025
BESM080051
02–107CheryAutomobileCo.,Ltd.

Downloaded from www.Manualslib.com manuals search engine 16. Remove the bolts (2) & (3) securing the engine oildipstick to intake manifold. Remove the dipstick.
(Tighten: Dipstick bracket bolts to 11 N·m)
17. Disconnect the oil pressure switch connector (4).
18. Remove the nuts (1) securing the intake manifold to cylinder head.
(Tighten: Intake manifold nuts to 11 N·m)
NOTE: Replace the manifold gasket.
19. Installation is in the reverse order of removal.
Installation Notes:
• Clean all surfaces of manifold and cylinder head.
• Install a new intake manifold gasket during installation.
• Install new O-rings on the fuel injectors.
Idler Pulley
Removal & Installation
1. While using a suitable tool and securely holding the hexagonal portion of the drive belt tensioner, rotate the
pulley counterclockwise to loosen the drive belt.
WARNING!
Avoid placing hands near the drive belt tensioner while it is being held.
2. Remove the drive belt.
Upper Accessory Drive Belt Idler Pulley (1)
• Remove the bolt and the upper accessory drive
belt idler pulley.
(Tighten: Upper idler pulley bolt to 45 N·m)
Lower Accessory Drive Belt Idler Pulley (2)
• Remove the bolt and the lower accessory drive belt
idler pulley.
(Tighten: Lower idler pulley bolt to 45 N·m) 3. Installation is in the reverse order of removal.
Oil Filter
Removal & Installation
NOTE :
The following special tools are required to perform the repair procedure:
• CH-10003 - Oil Filter Remover
CAUTION:
When servicing the oil filter, avoid deforming the filter by installing the special tool against the
base of the filter.
ON-VEHICLE SERVICE
LTSM020223
LTSM020203
02–11 9Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.4L ENGINE MECHANICAL
GENERAL INFORMATION02-151
Description 02-151
Operation 02-151
Specifications 02-151
Special Tools 02-154
Lubrication System 02-160
DIAGNOSIS & TESTING02-163
Engine Performance Diagnostics 02-163
Engine Mechanical Diagnostics 02-164
Cylinder Compression Pressure Test 02-165
Cylinder Head Gasket Test 02-166
Engine Oil Pressure Test 02-166
ON-VEHICLE SERVICE02-167
Accessory Drive Belt 02-167
Removal & Installation 02-167
Air Cleaner Element 02-168
Removal & Installation 02-168
Air Cleaner Housing 02-169
Removal & Installation 02-169
Cylinder Head Cover 02-170
Removal & Installation 02-170
Camshaft 02-171
Removal & Installation 02-171
Cylinder Head 02-175
Removal & Installation 02-175
Front Crankshaft Oil Seal 02-177
Removal & Installation 02-177
Rear Crankshaft Oil Seal 02-179
Removal & Installation 02-179
Engine Mounts 02-181
Removal & Installation - Left Mount 02-181
Removal & Installation - Right Mount 02-182
Removal & Installation - Front Mount 02-182
Removal & Installation - Rear Mount 02-183
Engine Assembly 02-183
Removal & Installation 02-183
Engine Timing Belt 02-189
Removal & Installation 02-189
Inspection 02-194
Timing Belt Automatic Tensioner 02-196
Removal & Installation 02-196
Inspection 02-197
Upper Balance Shaft Timing Belt 02-198
Removal & Installation 02-198Exhaust Manifold
02-200
Removal & Installation 02-200
Intake Manifold 02-201
Removal & Installation 02-201
Upper Balance Shaft 02-204
Removal & Installation 02-204
Upper Balance Shaft Bearing
Replacement 02-207
Lower Balance Shaft 02-208
Removal & Installation 02-208
Lower Balance Shaft Bearing
Replacement 02-211
Oil Filter 02-212
Removal & Installation 02-212
Oil Pan 02-213
Removal & Installation 02-213
Oil Pump 02-215
Removal & Installation 02-215
Oil Strainer 02-216
Removal & Installation 02-216
ENGINE UNIT REPAIR02-217
Engine Block 02-217
Specifications 02-217
Disassembly 02-218
Inspection 02-220
Assembly 02-220
Pistons 02-221
Specifications 02-221
Disassembly 02-222
Inspection 02-224
Assembly 02-226
Connecting Rods 02-229
Specifications 02-229
Disassembly 02-229
Inspection 02-230
Assembly 02-231
Crankshaft 02-233
Specifications 02-233
Disassembly 02-234
Inspection 02-236
Assembly 02-237
02–149Chery Automobile Co., Ltd.