Is it difficult to replace spark plugs?
Changing spark plugs takes about an hour (for a four-cylinder engine) and will save you at least a hundred bucks in labor if you do it yourself. In most cases it’s a simple job that will help to maintain peak performance and the highest possible gas mileage.
How do I know if my spark plugs need replacing?
If the engine is making a pinging, rattling or knock-like noise, or if there is a strong vibration, the spark plugs and/or the spark plug wires could be to blame. 6. Engine Misfires Replace the plugs more frequently if there’s oil on the plug’s tip when removed from the engine.
What happens when a spark plug fails on a car?
When a spark plug fails, the particular cylinder that corresponds to that plug does not combust as it should, leading to a misfire. This leads to an unevenness that can be felt at idle, as well as under both cruising and accelerating conditions, in most cases. A failed spark plug is often accompanied by an illuminated check engine light.
Where can I buy a new spark plug?
The tools shown are available at online suppliers and auto parts stores. While you’re there, ask the clerk for the spark plug gap and torque specifications for your vehicle. And buy a small packet of dielectric grease. It’s also important to ask about spark plug replacement cost before making an appointment.
Do you need torque wrench to change spark plugs?
Proper spark plug torque is critical in today’s engines. Always use a torque wrench and the manufacturer’s spark plug torque specs. Insufficient torque can result in a plug blowing right out of the cylinder head, taking the threads with it.
If the engine is making a pinging, rattling or knock-like noise, or if there is a strong vibration, the spark plugs and/or the spark plug wires could be to blame. 6. Engine Misfires Replace the plugs more frequently if there’s oil on the plug’s tip when removed from the engine.
What does it mean when your spark plugs are bad?
A bad spark plug may cause your engine to sound rough while idling. The vehicle-encompassing, jittery sound will also cause your vehicle to vibrate. It can indicate a spark plug problem in which a cylinder misfires only while idle. 6. Hard to Start If you have trouble starting your vehicle, it could be a sign your spark plugs are worn.
Is it worth it to replace spark plugs in Subaru?
Spark plug replaces can be a little costly, but as we like to say, it’s better to pay a little more now than to have a problem later. Spark plug replacement can give you peace of mind that your Subaru is in tip-top shape.
The tools shown are available at online suppliers and auto parts stores. While you’re there, ask the clerk for the spark plug gap and torque specifications for your vehicle. And buy a small packet of dielectric grease. It’s also important to ask about spark plug replacement cost before making an appointment.