Spark Plug Burned Out from Cylinder Head
What is a spark plug burned out?
Blown spark plugs are a problem that primarily affects certain Ford vehicles. What happens is the spark plug actually blows out of the cylinder head.
It’s usually attached to the coil wire, but it’s not in the combustion chamber, so it doesn’t move at all. This is a known issue with certain Ford vehicles, specifically his 4.6 liter, 5.4 liter, and his 6.8 liter engines. Note, however, that while this is much more common with these vehicles, it’s not the only one that can occur. And since it’s a common problem with these Ford vehicles, there are repair kits readily available.
If it happens on another type of vehicle, finding the right repair kit can be a little more difficult.
What causes spark plugs to burned out?
Spark plug burnout can have several causes, but the most common reason is that the spark plug was slightly loose after installation. Over time, the spark plugs will continue to pull out, eventually not having enough screws to hold them in place.
When the engine runs, the spark plug pops out of the hole. To make matters worse, some older service manuals for certain Ford vehicles list torque values that are a little too low. Using the low torque version risks spark plug seizure from the cylinder head on the road. Combustion chambers can be over pressurized, but this is only an issue if you have a lot of performance parts on your vehicle. Even then, the frost plug will crack before the spark plug.
Some guides say that applying too much torque to the spark plug can blow it out of the cylinder head, but I’m not sure how that happens. Over-tightening the spark plug risks cracking or breaking the spark plug itself, but it should not blow out of the cylinder.
How can you tell if a spark plug is blown?
Some guides list a number of symptoms of spark his blown plugs, but this is another area where you don’t have to worry about a big diagnosis. Because when the engine blows the spark plugs out of the cylinder head, it sounds like a gunshot. It’s loud and very noticeable, and anyone near the car will notice it. That’s not all. And that’s only if the spark plug blew. If you look under the hood, you can see Spark’s plug hanging from the wire. This is a very easy problem to diagnose.
How to prevent spark plug from burned out?
Spark his plug burned out of the cylinder head is something you really want to avoid. Proper installation of spark plugs with proper torque specifications is key to prevention. Do not use the lower torque ratings found in old Ford service manuals.
Other guides recommend torque checking the spark plugs more often, but if you use the correct torque specs in the first place, this is completely unnecessary. Not only that, paying a mechanic to do it is a waste of money, and doing it yourself will waste a lot of time.
Also, do not use anti-seize or other lubricants when installing spark plugs. This can affect torque specifications and is the only defense against burning out spark plugs.