What happens if you dont grease spark plugs?
NGK does not recommend the application of lubricant such as copper grease to spark plug threads as the result is a reduction of frictional forces at the thread faces. This will render the torque readings inaccurate and over tightening could occur by up to 20 percent!
Do you really need dielectric grease for spark plugs?
Most commonly applied on spark plug boots, lightbulbs, and battery terminals, dielectric grease is, in theory, a protectant like car wax. It’s not required, but it could help extend and maintain the life and quality of your vehicle and its parts.
How to diagnose a spark plug failure?
– Replace the spark plug of cylinder and check out if the failure exchange the cylinder, if this has not occurred is a sign that the failure is not from the spark plug; – With the assistance of a megohmmeter, check out the spark plug isolation. Low isolation can be due to carbonization, flooding and cracks on the isolator.
Is it dangerous to use anti seize on spark plugs?
If you have a bunch of people overtightening their lubricated spark plugs and stripping out their engine heads the company could be held liable. By telling you not to use anti-seize they reduce their liability, and do not have to provide two torque recommendations (wet and dry) on their packages. Or watch the NGK video about anti-seize here:
What should the resistance of a spark plug be?
– For resistive type spark plugs check out the value of the internal resistance of the spark plug that can range from 3 to 7.5 kΩ, for some models of spark plug the resistance ranges from 1 to 2 KΩ. Spark plugs with resistance value outside the specified should be replaced
Is it dangerous to break a spark plug?
Unless wherever you’re getting torque values from specifically states “wet” torque, then it is dry torque (they are assuming the threads are NOT lubricated). If you consistently tighten wet threads to dry torque values you will at some point break a spark plug off in the head, or do damage in some other way.
Why are spark plugs not supposed to be anti seize?
Spark plug companies don’t recommend anti-seize on threads because it lowers the torque required to install the plug. Torquing the plugs to the published spec with anti-seize overtorques the plug which potentially could break the internal seal between the insulator and the shell, creating a leak path.
Why does my spark plug have no spark?
A spark plug can deliver a weak spark (or no spark at all) for a variety of reasons. Defective coil, too much compression with incorrect plug gap. Dry fouled or wet fouled spark plugs, insufficient ignition timing. Slight misfires can cause a loss of performance for obvious reasons.
What kind of spark plugs have the same reach?
“As an example, an Autolite copper 105 versus an XP Iridium 105 will have identical ceramic temperatures and the carbon burn off will be the same,” says Reeves. A spark plug’s reach is defined as the length of the threads.
Unless wherever you’re getting torque values from specifically states “wet” torque, then it is dry torque (they are assuming the threads are NOT lubricated). If you consistently tighten wet threads to dry torque values you will at some point break a spark plug off in the head, or do damage in some other way.