FAQs » Page 3 of 22 » BookMechanic.uk

Q: What do spark plugs do in a car?

Spark plugs ignite the air and fuel mixture inside your engine’s cylinders. This ignition is what powers your engine and keeps your car running. Without functioning spark plugs, your vehicle won’t start or run efficiently.

Q: How much does it cost to replace a timing chain?

The cost can vary based on your vehicle’s make and model, but timing chain replacements typically range from £400 to £1,200 . At BookMechanic.uk, we offer competitive pricing and upfront quotes before any work is carried out.

Q: How do I know if my timing chain needs to be replaced?

Common signs of a worn or failing timing chain include: Rattling noise from the engine Engine misfires or runs poorly Check engine light is on Difficulty starting the vehicle If you notice any of these symptoms, book an inspection as soon as possible.

Q: Do I need to be present during the appointment?

In most cases, yes — especially for mobile services. Being present ensures the mechanic can access your vehicle and discuss any findings or additional work if needed. If you can’t be there, make sure someone else can hand over the keys or contact the mechanic in advance to arrange alternative access if appropriate.

Q: How do I pay for a service on BookMechanic.uk?

All payments are made securely online at the time of booking using our payment partner, Stripe . We accept most major debit and credit cards. Your payment is held until the mechanic completes the job, providing added peace of mind. No cash payments are taken through the platform.