Seized spark plugs

[E Sully]

A can of the compressed gas that are used for computer cleaning held upside down will work for spot cooling.

[TCracingCA]

Originally Posted by Wayne at Pelican Parts

A few things:

- The rhetoric in this thread is not compatible with the culture of this forum. Change or there will be changes.

- As I wrote in each of my books, Porsche does not recommend using anti-seize on any of the plugs. This is documented in Porsche Technical Bulletin 9102, Group 2 identifier 2870. The bulletin applies retroactively to all models, and the theory is that the anti-seize tends to act as an electrical insulator between the plug and the cylinder head. This could have a detrimental effect on the firing of the spark due to the loss of a good, consistent ground connection.

- There is a bit of a trick that I have sometimes used to remove stuck bolts. I heat the outside up (like the cylinder head), and then use liquid nitrogen or something similar to drip on and cool the center plug / bolt that is to be removed. This heats up and expands the outside, while cooling the inside. You can take a can of compressed air (the ones used for blowing out computer equipment), and turn it upside down, and liquid-nitrogen-like coolant will drip out. This is pretty useful for this purpose.

-Wayne

I would assume you mean to just break the plugs loose?, but then to let the head cool to room temperature/warm (touch temp) for the rest of the removal! Thus you minimize the risk to the threads! But if they get stuck again, or there is interference and they are not coming out freely, I could see the need to repeat this process multiple times!

[tobluforu]

I have used this on a few rusted to all hell nuts, worked sometimes, others not.
- Henkel North America.

[TheSt|G]

Could be worse, previous owner decided to install one of mine a bit sideways.