Spark Plug Replacement

Mobile spark plug replacement at your home or office, gapped and torqued correctly to restore smooth running and economy.

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Pricing

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Service Info

Typical Duration 1 hour

We remove and read the existing plugs, clean the plug wells, fit new plugs of the correct type and heat range with the gap verified, torque them to specification, and inspect the coils and leads for condition before running the engine.

Skip the garage, our master mechanics come to you

At your home or office
Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Mobile Spark Plug Replacement

Spark plugs ignite the mixture in every cylinder, thousands of times a minute, and they wear a little with each one. As the electrode erodes the gap widens, the coil has to work harder to jump it, and eventually the spark becomes unreliable under load. That shows up as misfiring, poor economy and a check engine light. Michanic replaces spark plugs at your home or office, with the correct type gapped and torqued to specification.

Why Choose Our Mobile Spark Plug Replacement Services?

  1. Correct Plug Type:
    Copper, platinum and iridium plugs have very different service lives, and heat range must match the engine. Fitting the wrong plug causes misfires or pre-ignition.
  2. Torqued to Specification:
    Spark plugs thread into an aluminium cylinder head. Over tightening strips the thread; under tightening causes them to loosen and blow out.
  3. Coils and Leads Checked:
    A misfire is often the coil rather than the plug. Both are inspected so the real cause is addressed.
  4. At Your Home or Office:
    About an hour on your driveway, with no workshop booking.

Why We are the Best Choice for Mobile Spark Plug Replacement

  • Old Plugs Read:
    A plug tells you about the cylinder it came from. Oil fouling, coolant deposits or heavy carbon are worth knowing about early.
  • Wells Cleaned:
    Debris sitting in the plug wells falls into the cylinder when the plug comes out. The wells are blown clear first.
  • Correct Gap Confirmed:
    Gaps are checked rather than trusted, because plugs are occasionally knocked out of specification in transit.
  • Anti-Seize Used Correctly:
    Applied where the manufacturer specifies it and not where they do not, since misuse affects the torque figure.

A worn spark plug does more than run roughly. When a cylinder misfires, unburnt fuel passes into the exhaust and reaches the catalytic converter, where it burns and overheats the substrate. A sustained misfire can melt a converter, turning an inexpensive plug change into a far larger repair. The wider gap also loads the ignition coil, which has to generate higher voltage to jump it, and coils that work harder fail sooner. Plugs are the cheapest part in that chain and the one that protects the rest.

Frequently Asked Questions

  • How often should spark plugs be replaced?
    It depends entirely on the plug type. Copper plugs often need replacing around thirty thousand kilometres, platinum considerably longer, and iridium plugs can last one hundred thousand kilometres or more. Your service book specifies which applies.
  • What are the symptoms of worn spark plugs?
    Misfiring, uneven idle, hesitation under acceleration, harder starting, rising fuel consumption and often a check engine light with a misfire code for one or more cylinders.
  • Can worn spark plugs damage anything else?
    Yes. A misfiring cylinder sends unburnt fuel into the exhaust, where it burns in the catalytic converter and overheats it. Worn plugs also make the ignition coils work harder, which shortens their life.
  • Does the type of spark plug matter?
    Very much. Heat range must match the engine, and electrode material determines service life. Fitting the wrong heat range can cause pre-ignition, which damages pistons, so the specified plug is not a place to economise.
  • Should the ignition coils be replaced at the same time?
    Not routinely, but they should be inspected. A coil that has been working against a wide plug gap for a long time is a common next failure, and on engines where access is difficult it can be sensible to do both together.