Departments› Automotive Mechatronics Technology› Module I› Vehicle Engine Maintainance› Ch 10: Service engine timing system
Automotive Mechatronics Technology  ·  Level 6
Vehicle Engine Maintainance
Chapter 10: Service engine timing system
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⚑ What you will be able to do

By the end of this chapter, you will be able to:

  • Accurately check engine timing settings and spot any deviations from the manufacturer’s specifications.
  • Observe engine vibrations while running, identify irregularities, and diagnose possible timing system faults.
  • Inspect the timing belt for wear and replace it correctly using the manufacturer’s standard procedure.
  • Recheck timing settings to confirm the engine is functioning properly according to specifications.
  • Monitor engine behavior for excessive vibration and noise, comparing it to the manufacturer’s dampening system standards.
  • Inspect engine mountings for wear, cracks, and looseness following the correct procedures.
  • Check the harmonic balancer and related components for wear beyond recommended limits using SOPs.
  • Remove and replace sources of vibration safely and correctly following standard manufacturing procedures.

Mastering these skills ensures your engine runs smoothly and reliably, helping you become a confident and skilled vehicle maintenance professional.

Chapter Practical Activities

Practical 1: Inspect engine timing components for wear and damage

Automotive Mechatronics Technology · Level 6
Vehicle Engine Maintainance
PRACTICAL ASSESSMENT
TIME: 4 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Inspect the engine timing belt, chain, tensioners, and pulleys of a petrol engine for wear, damage, and proper tension as per manufacturer's specifications.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Mechanic’s tool kit including spanners, screwdrivers, and pliersClean lint-free cloth
Feeler gauge setDegreaser spray
Inspection mirrorOverall/dust coat
Flashlight/inspection lampSafety boots
Disposable gloves
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1Complete petrol engine with exposed timing system1 Pc per Candidate
2Mechanic’s tool kit including spanners, screwdrivers, and pliers1 Set per Candidate
3Feeler gauge set1 Set per Candidate
4Inspection mirror1 Pc per Candidate
5Flashlight/inspection lamp1 Pc per Candidate
6Clean lint-free cloth3 Pcs per Candidate
7Degreaser spray1 Can per 5 Candidates
8Overall/dust coat1 Pc per Candidate
9Safety boots1 Pair per Candidate
10Disposable gloves1 Pair per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Personal Protective Equipment and Preparation
Wore overall/dust coat
(Award 1 mark or zero)		1
Wore safety boots
(Award 1 mark or zero)		1
Wore disposable gloves
(Award 1 mark or zero)		1
Prepared and cleared working area
(Award 1 mark or zero)		1
Selected appropriate tools and materials for inspection
(Award 1 mark or zero)		1
Sub-Total5
TASK 2: Inspection of Timing Belt and Chain
Removed timing cover carefully without damage
(Award 2 marks or zero)		2
Inspected timing belt for cracks, fraying, glazing, and missing teeth
(Award 2 marks or zero)		2
Inspected timing chain for elongation, wear, and damaged links
(Award 2 marks or zero)		2
Checked belt and chain tension using manufacturer’s method
(Award 2 marks or zero)		2
Inspected timing belt tensioner and chain tensioner for smooth operation and wear
(Award 2 marks or zero)		2
Sub-Total10
TASK 3: Inspection of Pulleys and Reassembly
Checked pulleys for wear, damage, and smooth rotation
(Award 2 marks or zero)		2
Cleaned timing components with degreaser and cloth
(Award 2 marks or zero)		2
Marked timing components for correct reassembly alignment
(Award 1 mark or zero)		1
Refitted timing cover securely without damage
(Award 2 marks or zero)		2
Cleaned working area and disposed of waste properly
(Award 1 mark or zero)		1
Sub-Total8
PRODUCT CHECKLIST
Timing belt inspected for correct condition with no visible cracks or missing teeth
(Award 2 marks or zero)		2
Timing chain inspected for correct tension and no elongation or damaged links
(Award 2 marks or zero)		2
Tensioners and pulleys inspected and confirmed to operate smoothly without wear
(Award 2 marks or zero)		2
Timing cover refitted correctly with alignment marks matching manufacturer’s specification
(Award 2 marks or zero)		2
Working area left clean and safe with no oil or grease spillage
(Award 2 marks or zero)		2
Sub-Total10
GRAND TOTAL33
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)

Practical 2: Removal of Engine Timing Belt or Chain

Automotive Mechatronics Technology · Level 6
Vehicle Engine Maintainance
PRACTICAL ASSESSMENT
TIME: 4 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Remove the engine timing belt or chain from the petrol engine mounted on the bench following proper manufacturer procedures.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Socket setPersonal Protective Equipment (overall, gloves, safety boots)
Torque wrench
Screwdrivers
Pry bar
Feeler gauge
Marker pen
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1Complete vehicle engine mounted on bench1 Pc per 5 Candidates
2Complete mechanic's toolbox1 Pc per Candidate
3Socket set (10mm, 12mm, 14mm, 17mm sockets)1 Set per Candidate
4Torque wrench1 Pc per 5 Candidates
5Screwdrivers (flat and Phillips)1 Set per Candidate
6Pry bar1 Pc per 5 Candidates
7Feeler gauge1 Pc per 5 Candidates
8Marker pen or paint marker1 Pc per Candidate
9Engine stand1 Pc per 5 Candidates
10Personal Protective Equipment (overall, gloves, safety boots)1 Set per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Preparation and Safety
Wore Personal Protective Equipment (overall, gloves, safety boots)
(Award 2 marks or zero)		2
Prepared the working area and selected the correct tools
(Award 2 marks or zero)		2
Sub-Total4
TASK 2: Draining and Accessing Timing Components
Drained engine coolant if required to access timing cover
(Award 2 marks or zero)		2
Removed engine accessories blocking access to timing cover (e.g. belts, pulleys)
(Award 3 marks or zero)		3
Removed bolts and detached timing cover carefully
(Award 3 marks or zero)		3
Sub-Total8
TASK 3: Removing Timing Belt or Chain
Marked timing belt/chain position and sprockets for reassembly
(Award 3 marks or zero)		3
Loosened tensioner to slacken timing belt or chain
(Award 3 marks or zero)		3
Carefully removed timing belt or chain without damaging sprockets
(Award 4 marks or zero)		4
Sub-Total10
TASK 4: Inspection and Clean-up
Inspected timing belt or chain for wear and damage
(Award 3 marks or zero)		3
Cleaned timing components and surrounding area
(Award 2 marks or zero)		2
Disposed of any waste materials properly
(Award 1 mark or zero)		1
Sub-Total6
TASK 5: Finalization
Ensured all tools and parts removed from work area
(Award 2 marks or zero)		2
Observed safety and housekeeping procedures
(Award 2 marks or zero)		2
Sub-Total4
PRODUCT CHECKLIST
Timing belt or chain removed without damage and marked correctly for reassembly
(Award 5 marks or zero)		5
Timing cover and components undamaged and correctly handled
(Award 3 marks or zero)		3
Work area left clean and safe
(Award 2 marks or zero)		2
Sub-Total10
GRAND TOTAL42
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)
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🔒Check and adjust engine timing marks alignment on a petrol enginePractical 3
🔒Replace engine timing belt for a 1.6L petrol enginePractical 4
🔒Adjust Timing Belt Tension on a Vehicle EnginePractical 5
🔒Install timing belt covers on a vehicle enginePractical 6
🔒Test engine timing system operation on a petrol enginePractical 7
🔒Service timing system tensioners and pulleys on a petrol enginePractical 8
🔒Record and report engine timing system servicePractical 9
🔒Diagnose Engine Timing Faults on a Petrol EnginePractical 10
Am I competent?

At the start of this chapter we promised you would be able to:

  • Accurately check engine timing settings and spot any deviations from the manufacturer’s specifications.
  • Observe engine vibrations while running, identify irregularities, and diagnose possible timing system faults.
  • Inspect the timing belt for wear and replace it correctly using the manufacturer’s standard procedure.
  • Recheck timing settings to confirm the engine is functioning properly according to specifications.
  • Monitor engine behavior for excessive vibration and noise, comparing it to the manufacturer’s dampening system standards.
  • Inspect engine mountings for wear, cracks, and looseness following the correct procedures.
  • Check the harmonic balancer and related components for wear beyond recommended limits using SOPs.
  • Remove and replace sources of vibration safely and correctly following standard manufacturing procedures.

Tick each one you can genuinely do.

So, are you there yet?

You're competent when you can confidently do 50% or more of what this chapter promised.

Sign in to record how you're doing.

← Ch 9: Troubleshoot electronic ignition s… Ch 11: Service engine vibration dampening… →