What happens if spark plug is loose

If a plug wasn't tightened properly when it was replaced, it could have just loosened up over time until it finally popped out. If that's what happened, all you need to do is screw it back in.

That's two bucks, not 2, RAY: More likely, when someone installed that spark plug, he stripped the threads in the head that hold it in. It held for a while, but because it's under extremely high pressure, eventually it gave way. TOM: That's why the dealer wants to replace your head.

We've wanted to replace my brother's head for years, but every time we try it, he wakes up and makes us stop. RAY: Replacing the head might not be necessary in your case, Micah. There's a thing called an "insert" that's designed for exactly your situation -- when the threads in a cylinder head are stripped but the head is otherwise fine. TOM: The insert is basically a new set of threads that screw into the head.

If you can fix this with an insert, that'll cost you more like one hundred dollars. RAY: Now, if the head is badly damaged for some reason, they may have no choice but to replace the whole thing. Do use a gapping tool to gently open the ground electrode air gap. To reduce the gap, hold the spark plug straight and gently tap the ground electrode against a hard surface.

Automotive: Speaking Maintenance. Mind Games. Contact Us. Connect with us. Advertise Subscribe Contact Us. By Gary Goms Goms. By Tomorrow's Technician Staff. By Andrew Markel.

Featured Video. This video is sponsored by Continental. Featured Course. Variable Valve Timing. Servicing a Tire Assembly. Sponsored Content. Undercar: Brake Rotor Quality Check. Automotive: Steering Angle Sensor Troubleshooting. By Gary Goms. On the upside, this is the safest procedure but, on the downside, this procedure can be extremely time-consuming in a production shop. In this article: spark plugs. Click to comment. Connected it once I realized that could be the problem.

But only drove 11km You're probably all right then, see the answers below. Thank you very much!! Add a comment. Active Oldest Votes. Please make it clear: disconnected or loose? Improve this answer. Solar Mike Solar Mike I would also mention possible catalytic converter damage from a disconnected spark plug.

Especially if it's Toyota Corolla, it may not have sophisticated electronics to detect misfiring cylinder and stop fuel injection to protect the cat. Thanx alot for your advice Makes perfect sence as to why it was smoking Started her this morning untill fan kicked in with no smoke coming from exhaust anymore Will gather up courage to actually drive out on the road Joys of being paranoid female.

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