check engine CHERY TIGGO 2009 Service Owner's Guide

Downloaded from www.Manualslib.com manuals search engine •Piston Pin Removal
Push out the piston pin with a suitable tool.
• Connecting Rod & Piston Disassembly
Remove the piston from the connecting rod.
Inspection
•Check the piston diameter.
PISTON DIAMETER
All Pistons 83.451 - 83.469 mm
ENGINE UNIT REPAIR
BESM020049
BESM020041
BESM020050
02
02–128Chery 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 83.500 - 83.510 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
02–129Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine RING END GAP CLEARANCE
First Ring 0.2 - 0.4 mm 0.8 mm
Second Ring 0.4 - 0.6 mm 1.0 mm
• Check the diameter of the piston pin bore.
• Check the outer diameter of the piston pin.
• Check the inner diameter of connecting rod (small end).
PISTON PIN CLEARANCE
Piston and Piston Pin 0.002 - 0.013 mm
Assembly
1. Install the piston to the connecting rod. Assemble the components in their original positions.
2. Using a piston ring expander, install the piston rings. Assemble the components in their original positions.
3. Assemble all components in the reverse order of disassembly.
ENGINE UNIT REPAIR
BESM020053
BESM020054
02
02–130Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Connecting Rods
Specifications
Torque Specifications
DESCRIPTIONTORQUE (N·m)
Connecting Rod Bolts 1st Step: Tighten bolts to 25 N·m
2nd Step: Tighten the connecting rod bolts an additional 90°
Clearance Specifications
DESCRIPTION SPECIFICATION (mm)
Connecting Rod Radial Clearance 0.016 - 0.051
Connecting Rod Axial Clearance 0.002 - 0.013
Disassembly
1. Remove the connecting rod cap bolts.
2. Remove the connecting rod bearing cap.
3. Using a hammer handle or similar tool, push the
piston and connecting rod assembly (1) out
through the cylinder head side of the engine block.
NOTE: Before removing the piston and connecting
rod assembly, check the connecting rod side
clearance.
ENGINE UNIT REPAIR
BESM020043
BESM020044
02–131Chery 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
02–132Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Inspection
•The crankshaft main journals should be checked for
excessive wear, roundness and scoring. Limits of
roundness on any crankshaft main journals should
be held to 0.008 mm. Limits of roundness on any
crankshaft rod journals should be held to 0.005
mm. DO NOT nick crank pin or bearing fillets. Lim-
its of out of round on any crankshaft journals
should be held to 0.005 mm.
• Check the axial clearance after installation. Stan-
dard of axial clearance should be 0.07 mm. Limits
of axial clearance should be held to 0.265 mm.
• Oil Clearance of crankshaft main journal
Clean the journal and bearing.
Install the crankshaft.
Cut the plastic-gauge to the same width as
the bearing, and then put it onto the crank-
shaft journal to make it parallel with the cen-
tral line of the crankshaft.
Install the main bearing cap carefully, and tighten the bolts to the specified torque.
Remove the main bearing cap.
Measure the oil clearance with the plastic- gauge.
Standard oil clearance of crankshaft main journal
should be 0.022 mm. Limits of oil clearance of crank-
shaft main journal should be 0.058 mm.
ENGINE UNIT REPAIR
BESM020075
BESM020076
BESM020077
02
02–134Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Inspection
Inspect the cylinder head for the following:
•Cylinder head must be flat within 0.04 mm.
• Inspect camshaft bearing journals for scoring.
• Remove carbon and varnish deposits from inside of
valve guides with a valve guide cleaner.
• Verify the valve tappets move freely in their bores,
and that they have been rotating.
• Check the valve guide height.
Assembly
1. Install new valve guide if necessary.
2. Install new valve seat if necessary.
3. Using special tool CH-20011 (1) and CH-20012 (2),
install the new valve oil seal.
4. Install the valves into the cylinder head (larger diameter on intake side).
5. Install the valve springs.
6. Install the valve spring retainers.
CYLINDER HEAD UNIT REPAIR
BESM020068
LTSM020224
02
02–138Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2. Remove the valve keeper (1), valve spring retainer(2) and valve spring (3).
3. Remove valves (4) from the cylinder head.
Inspection
Inspect the valves for the following:
• Clean all valves thoroughly and discard burned,
warped and cracked valves.
• Check valve seats and valve faces for damage.
• When reconditioning valves follow the specifications
outlined for both intake and exhaust valves.
CYLINDER HEAD UNIT REPAIR
VISM080041
BESM020066
02
02–144Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ITEMSPECIFICATION (mm)
Valve Outer Diameter Intake Valve
5.98 ± 0.008
Exhaust Valve 5.96 ± 0.008
Valve Guide Inner Diameter Intake Valve
5.4 ± 0.1
Exhaust Valve 5.4 ± 0.1
Fringe Thickness On Top Of Valve Intake Valve
0.3 ± 0.15
Exhaust Valve 0.3 ± 0.15
Valve Tilt Angle Intake Valve
65°
Exhaust Valve 68°
Valve Height Intake Valve
107.998
Exhaust Valve 106.318
• Measure valve deflection.
VALVE DEFLECTION LIMIT (DIAL GAUGE READING)
Intake 0.02 mm
Exhaust 0.04 mm
• If it exceeds the limit, check valve to valve guide clearance.
Measure valve stem diameter and valve guide inner diameter.
Check that clearance is within specification.
If it exceeds the limit, replace valve or valve
guide.
VALVE TO VALVE GUIDE CLEARANCE STANDARD
Intake 0.012 - 0.043 mm
Exhaust 0.032 - 0.063 mm
Assembly
1. Install the valves into the cylinder head (larger diameter on intake side).
2. Install the valve springs.
3. Install the valve spring retainers.
CYLINDER HEAD UNIT REPAIR
BESM020073
02–145Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Engine Performance Diagnostics
CONDITIONPOSSIBLE CAUSES 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 as 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
02–163Chery Automobile Co., Ltd.