1. Manuals
  2. Brands
  3. Chery Manuals
  4. Automobile
  5. A21
  6. Service manual

Chery A21 Service Manual

Mechanism of 2.0na engine
Hide thumbs
Table of Contents

Advertisement

Quick Links

CHERY A21 SERVICE MANUAL
CONTENT
Section 1 Technology Data Instruction ................................................ 2
Section 2 Special Tools................................................................................... 5
Section 3 Engine Number Position ............................................................. 6
Section 4 Collating Method Of Engine Timing..................................... 7
Chapter 2 Engine Body ........................................................................................ 9
Section 1 Wheel Train...................................................................................... 9
Section 2 Cylinder Head .............................................................................. 14
Section 3 Short Engine.................................................................................. 26
PDF created with pdfFactory Pro trial version
MECHANISM OF 2.0NA ENGINE
www.pdffactory.com
MECHANISM OF 2.0NALC ENGINE
1

Advertisement

Table of Contents
loading

Related Manuals for Chery A21

Summary of Contents for Chery A21

  • Page 1 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE MECHANISM OF 2.0NA ENGINE CONTENT CHAPTER 1 ENGINE PARAMETER AND SPECIAL MAINTENANCE TOOLS ..2 SECTION 1 TECHNOLOGY DATA INSTRUCTION ..........2 SECTION 2 SPECIAL TOOLS................... 5 SECTION 3 ENGINE NUMBER POSITION ............. 6 SECTION 4 COLLATING METHOD OF ENGINE TIMING........

  • Page 2: Chapter 1 Engine Parameter And Special Maintenance Tools

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE CHAPTER 1 ENGINE PARAMETER AND SPECIAL MAINTENANCE TOOLS SECTION 1 TECHNOLOGY DATA INSTRUCTION ENGINE CHARACTER Engine Model SQR481H 4-Cylinder, Water Cooled, In-line Double Overhead Camshaft, 16 Valve, Engine Type Controllable Burning Rate, Variable Valve Timing Cylinder Diameter（mm）...
  • Page 3 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE TECHNOLOGY DATA INSTRUCTION Item Standard Value Intake cam 37.15 Cam Height Exhaust cam 37.05 − Intake cam − Camshaft Diameter Camshaft − Exhaust cam − Intake cam 0.15--0.20 Axial clearance of Camshaft Exhaust cam 0.15--0.20...
  • Page 4 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Outer Diameter Pressure Height 16±0.3 Protruding Part of Valve Stem 47.5 Piston Piston Skirt Diameter 83.46±0.009 Ring 0.04--0.08 Side Clearance Ring 0.01--0.025 Ring 0.2--0.4 End Play Ring 0.4--0.6 Piston Ring Ring Height...

  • Page 5: Section 2 Special Tools

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE SECTION 2 SPECIAL TOOLS Camshaft Timing Tool Crankshaft Timing Tool Flywheel Tool Guide Sleeve of Crankshaft Oil Seal Guide Sleeve of Camshaft Oil Seal Hydraulic Hoist PDF created with pdfFactory Pro trial version...

  • Page 6: Section 3 Engine Number Position

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Fuel Pressure Gauge Cylinder Pressure Gauge: when measure the cylinder pressure, firstly remove the spark plug, screw the pipe end of instrument instead of it, and operate the engine by starter, then take the maximum value in cylinder pressure gauge as cylinder pressure.

  • Page 7: Section 4 Collating Method Of Engine Timing

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE SECTION 4 COLLATING METHOD OF ENGINE TIMING 1. Remove the upper cover of engine timing belt. 2. Remove the lower cover of engine timing belt. 3. Loosen the central bolt of timing belt tension pulley and remove the timing belt.
  • Page 8 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 5. Loosen the bolt of valve cover and remove the valve cover. 6. Rotate the camshaft in order to clip the camshaft tool into the slot at the end of Camshaft Tool camshaft.

  • Page 9: Chapter 2 Engine Body

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 9. Mount the timing belt and rotate tension pulley with Allen wrench in order to tension the belt and make the finger of tensioner point to the middle of U slot opening. Fasten the bolt of tension pulley,...
  • Page 10 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE II. MAINTENANCE 1. Replace upper and lower covers of timing belt 1.1 Needed tools and auxiliary materials Allen wrench, 10#, 13# sleeve, ratchet wheel and ratchet rod. 1.2 Removal Loosen the five bolts on the upper cover with Allen wrench.
  • Page 11 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Remove the 5 bolts on the lower cover of timing belt with 10# sleeve, ratchet wheel and ratchet rod. Remove the lower cover. Inspection Observe the timing cover and the timing belt.
  • Page 12 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE timing belt” for details). Loosen the central bolt of tension pulley and remove the timing belt. 2.3 Inspection Check the timing belt carefully; replace the parts if any following situation occurs. (1) Chap of back-side rubber (2) Chap of dedendum, chap of separated cord fabric.
  • Page 13 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 2.4 Installation The installing steps are reverse to those for removal. Note: Do engine timing. 3. Replace idler wheel, tensioner and contact belt pulley 3.1 Needed tools and auxiliary materials Allen wrench, 10#, 13# and 15# sleeve, ratchet wheel and ratchet rod.

  • Page 14: Section 2 Cylinder Head

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE SECTION 2 CYLINDER HEAD I. STRUCTURAL DIAGRAM 1. Gasket—Intake Manifold 5. Gasket—Throttle Valve Body Assembly 2. Intake Manifold Assembly 6. Oil injector Assembly 3. Hexagonal Flange Bolt 7. Fuel Distribution Pipe Assembly 4.
  • Page 15 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 1. Intake Valve 12. Front Camshaft Oil Seal 2. Valve Oil Seal 13. Exhaust Camshaft Assembly 3. Valve Spring Seat 14. Rocker Arm Assembly 4. Valve Spring 15. Hydraulic Tappet Assembly 5. Valve Spring Retainer 16.
  • Page 16 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE II. MAINTENANCE Replace intake manifold, delivery pipe and oil injector 2.1.1 Needed tools and auxiliary materials Ratchet wheel, ratchet rod, 10# sleeve and crosshead screwdriver 2.1.2 Process of removal Put the ignition key at the OFF position.
  • Page 17 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 2.1.3 Installation steps The installing steps are reverse to those for removal. 2.2 Replace camshaft, bearing bushings, valve and valve oil seal. 2.2.1 Needed tools and auxiliary materials Special tools for valve oil seal, engine...
  • Page 18 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Dismantle the belt pulley of air intake and exhaust camshafts with torque wrench. Remove the back cover of timing belt. Dismantle the bearing caps of air intake and exhaust camshaft respectively and put them down in the sequence.
  • Page 19 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE See the following picture for removal sequence of intake and exhaust camshaft-bearing caps: 8) Take out the camshaft and the hydraulic tappet. 9) Remove the valve spring with special tools. (Picture is unavailable) 10) Remove the used valve oil seal with special tools.
  • Page 20 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 2) Check camshaft Measure camshaft diameter with micrometer caliper. Standard Value Limit Value （mm） (mm) -0.040 ￠24 Diameter -0.053 Replace with the new camshaft if the measured value exceeds the limit value.
  • Page 21 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Use internal micrometer guage to measure the internal diameter of valve guide and the measuring point is a Measuring Point quartering point of guide. Calculate the difference of measured value and the clearance.
  • Page 22 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Examine the protruding capacity of Top of Valve Stem valve stem. And Examine the protruding high of valve stem with vernier caliper.（See picture） Protruding High of Valve Stem Standard Value （ mm）...
  • Page 23 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Revise it if the planeness exceeds, and replace when it exceeds the limit value. The permitted maximum abrading thickness between cylinder block and cylinder head is: 2.2.3 Installation The installing steps are reverse to those for removal.
  • Page 24 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 1. Pad—Thermostat Seat 2. Thermostat Seat 3. Hexagonal Flange Bolt 4. Thermostat Assembly 5. Hexagonal Flange Bolt 6. Cover—Thermostat Seat 2.3.2 Needed tools and auxiliary materials Hatch clamp,10# sleeve, ratchet wheel and wrench 2.3.3 Removal...

  • Page 25: Section 3 Short Engine

    CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE SECTION III SHORT ENGINE I. STRUCTURE DIAGRAM 1. Piston 12. Oil Pump 2. Connecting Rod Upper Bearing 13. Bolt 3. Timing Hole Plug 14. Gasket 4. Connecting Rod Lower Bearing 15. Crankshaft Timing belt pulley 5.
  • Page 26 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 23. Crankshaft Main Bearing Bolt 26. O-Type Ring 24. Frame Bolt 27. Crankshaft 25. Frame 28. Cylinder Block PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 27 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE II. MAINTENANCE 1. Replace oil pan 1.1 Needed tools and auxiliary materials 10# open end wrench, 10#, 15# and 17# sleeve, ratchet wheel and ratchet rod, Le Tai 5901 Glue, engine oil 1.2 Process of Replacement...
  • Page 28 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Remove the connecting bolt between the oil return pipe of PVC valve and the oil pan with 15# sleeve wrench. Tap the edge of oil pan with rubber pestle, and then remove the oil pan.
  • Page 29 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 2 Replace the engine oil strainer 2.1 Needed tools and auxiliary materials 10# open end wrench, 10#, 15#, 17# sleeve, ratchet wheel and ratchet rod, Le Tai 5901 Glue, engine oil 2.2 Process of replacement 2.2.1 Process of removal...
  • Page 30 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 3 Replace the piston, piston ring, piston pin and connecting rod bearing 3.1 Needed tools and auxiliary materials 10# open end wrench, 10#, 15#, 17# sleeve, ratchet wheel and ratchet rod, Le Tai 5901...
  • Page 31 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Uplift the connecting rod and the piston with a wooden stem and then remove the connecting rod and piston assembly. Remove the piston ring. Remove the retainer ring of piston pin and draw out the piston pin.
  • Page 32 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Examine the clearance between piston ring and ring groove. Clean up the accumulated carbon in the ring groove with piston ring. Examine the clearance between piston ring and ring groove with feeler gauge.
  • Page 33 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Inspect the diameter of piston pin and piston pin hole. As the following picture, measure the piston position around with micrometer caliper. take the maximum value as the diameter of piston pin.
  • Page 34 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Inspect the connecting rod journal and connecting rod bearing Examine the diameter of connecting rod journal. Measure the axle diameter of connecting rod with micrometer caliper. Rotate the crankshaft 90° and measure it again.
  • Page 35 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Loosen the connecting rod bolt, remove the cap, and measure the maximum width of pressed clearance gauge with the ruler on its package to get the clearance value. Standard Abrasion Value Limit Clearance 0.016—0.051...
  • Page 36 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Inspect cylinder Inspect if the cylinder wall is scratched or scored. If there are cylinder scoring and scratching you need to hone cylinder wall, replace cylinder liner or replace 12 mm cylinder block.
  • Page 37 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Mount the upper bearing of connecting rod and the connecting rod together. Note: the gap on bushing should be orderly with that of connecting rod. Spread the engine transmission oil in the...
  • Page 38 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Mount the lower bearing of connecting rod and the connecting rod cap together. Then spread engine transmission oil. Note: the gap on bushing should be orderly with that of connecting rod. Close the connecting rod cap and screw down the bolt.
  • Page 39 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Engage the gear to 5th, then press the brake with toes, Dismantle connecting bolt of timing belt pulley and crankshaft with torque wrench. Remove the timing belt. Torque:130±10,then screw 65°±5° Pry out the old oil seal with right-angled screwdriver carefully.
  • Page 40 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 5.2 Process of Replacement 5.2.1 Process of Removal Dismantle the timing belt (See “removal of timing belt” for details). Engage the gear to 5th, then press the brake with toes, and remove the timing belt pulley.
  • Page 41 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE 6.2 Installation Clean the oil seal seat ring. Clean the oil seal seat ring with clean oiled gauze. Spread the oil at the lip of crankshaft front oil seal. Enclose the guide sleeve of crankshaft oil seal, special tool, with that oil seal.
  • Page 42 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Dismantle the accessories, such as dynamo, compressor, power steering pump and bracket. （See the “replacement of engine accessory” for details） Dismantle the engine cylinder head assembly. （ See the “replacement of cylinder head” for details）...
  • Page 43 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Mount the main bearing cap carefully and screw down the bolt with specified torque. e): Dismantle main bearing carefully. Measure the width at the most bread part of pressed plastic line with ruler on plastic clearance gauge package, then get clearance value.
  • Page 44 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE Inspect the crankshaft axial clearance Mount the crankshaft and measure its radical clearance with micrometer guage. Standard Value Clearance 0.076—0.265 Replace the new thrust washer if the measured value exceeds the limit value.
  • Page 45 CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE mount the water pipe and insert electric connector. 8 Replace coolant pump 8.1 Needed tools and auxiliary materials A box sleeve wrench, a set of open end wrench, allen wrench, coolant 8.2 Removal Remove the engine timing belt.（see...

Table of Contents