Timing Belt Replacement Guide

Scope of Works

• Confirm service interval in the manufacturer schedule and run engine‑diagnostic scan.

• Isolate battery, drain coolant (if water‑pump included) and remove covers, auxiliary belts and pulleys to expose the timing belt.

• Lock crankshaft & camshafts with setting tools; mark alignment reference points.

• Remove old timing belt, tensioner and idler pulleys; inspect oil seals for leaks.

• Install new belt kit (belt, tensioner, idlers) and torque to spec, resetting tension.

• Optional extras: replace water pump, auxiliary belt and coolant; swap wet‑belt oil strainer if applicable.

• Rotate engine by hand, re‑time and reassemble all covers, ancillaries and fluids.

• Run‑up, leak‑check and ECU clear down, stamp service record and reset reminder.
  

Typical Cost (inc. VAT)

Reference prices: Checkatrade cambelt cost guide (average £600–£1,000) Checkatrade; RAC timing‑belt cost overview (mean £468 inc. parts & labour) RAC.

Time on Site

• 2 – 5 hours workshop time for most four‑cylinder petrol/diesel engines.

• Extend if: engine is transversely mounted with poor access, wet‑belt involves sump‑pan removal, seized fasteners require heat/ extraction, or the water pump/aux belts are added to the job.
  

Questions to Ask Your Trade

1. Is the water pump, tensioners and auxiliary belt included in your quote?

2. Will you use an OEM or high‑quality branded kit and supply the part numbers?

3. Do you have the manufacturer locking tools for my engine code?

4. What warranty do you give on parts and labour (typical 12–24 months)?

5. How will you document timing marks and provide a printed service record?

6. Is the coolant refill and bleed included, and will you use manufacturer‑approved coolant?

7. Are you IMI‑registered or ATA‑accredited, and do you carry motor‑trade insurance for road tests?
   

How to Avoid Surprises

• Provide secure parking or garage space with enough bonnet‑up clearance.

• Check the service history so the mechanic knows if ancillary parts are overdue.

• Ask whether ADAS reset or battery coding is required after reconnection.

• Confirm access to mains power and good lighting if the work is on your drive.

• Ensure wet‑belt engines (e.g., Ford EcoBoost) are declared—extra parts/time needed.

• Clarify if the old belt and fluids will be removed from site and included in the price.
  

All figures are average UK costs for 2025, inclusive of 20 % VAT.