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Spark plugs will not loosen?

Tiny
MICHAEL NEEDS HELP
  • MEMBER
  • 1991 CHEVROLET SILVERADO
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 188,000 MILES
What would cause the plugs to not loosen (even tried putting a pipe over ratchet like a breaker bar) I have stopped because the 2-plug did the same thing. What's the trick to getting them off when they are that tight?
Tuesday, October 24th, 2023 AT 12:24 AM

1 Reply

Tiny
BORIS K
  • MECHANIC
  • 799 POSTS
Hello,

Seized spark plugs can be difficult to remove.
Best apply some graphite penetrating spray, let soak over night.
Use a good quality spark plug socket so it does not round off the spark plug.

A good video:
https://youtu.be/9OTsu5MizSE?si=Ep3eoMkepc2OiXdW

Cheers, Boris
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Tuesday, October 24th, 2023 AT 3:54 AM

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