Chery Tiggo. Manual — part 12
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
ON-VEHICLE SERVICE
Accessory Drive Belt
Removal & Installation
WARNING!
Inspect the drive belt only when the engine is stopped.
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.
1 - Drive Belt
2 - Generator Bolt
3 - Tensioner Pulley Bolt
4 - Tensioner
5 - Compressor
6 - Generator
7 - Idler Pulley
8 - Generator Bracket
9 - Generator Bracket Bolt
10 - Generator Bracket Bolts
11 - Power Steering Pump Bolt
12 - Power Steering Pump Bolt
13 - Power Steering Pump Bolt
14 - Power Steering Pump Bracket
15 - Power Steering Pump Bracket Bolts
16 - Power Steering Pump
17 - Idler Pulley
18 - Compressor Bolts
LTSM020163
02
2. Remove the drive belt.
3. Remove accessory drive belt tensioner pulley bolt
(1) if necessary.
(Tighten: Accessory drive belt tensioner pulley bolt
to 35 N·m)
4. Installation is in the reverse order of removal.
Air Cleaner Element
Removal & Installation
1. Unhook the air cleaner case side clips (1) and
raise the air cleaner case (upper).
2. Remove the air cleaner element.
3. Install a new air cleaner element.
4. Installation is in the reverse order of removal.
Installation Notes:
• If necessary, clean the inside of the air cleaner housing before installing new air cleaner element.
Air Cleaner Housing
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the air flow sensor electrical connector (1.8L Engine).
ON-VEHICLE SERVICE
LTSM020196
LTSM020238
3. Loosen the clamp (1) between the air intake air
hose and the air cleaner and remove the intake air
hose.
4. Remove the screws (1) securing the air cleaner
housing to its base.
5. Remove the air cleaner housing.
6. Remove the air cleaner base.
7. Installation is in the reverse order of removal.
Cylinder Head Cover
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Use compressed air to blow dirt and debris off the
cylinder head cover prior to removal.
4. Disconnect the camshaft position sensor electrical
connector.
5. Remove the camshaft position sensor (2) and set it
aside.
6. Remove the spark plug wires (3) and set them
aside.
7. Remove the PCV hose (1) from cylinder head
cover.
ON-VEHICLE SERVICE
LTSM020242
LTSM020243
BESM020022
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст