colder plug more threads?

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Jan 14, 2008 | 07:53 PM

1fast 99gt

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4th Gear Member

Joined: Nov 2006

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colder plug more threads?

ok so i bought some autolight 103's and they have more threads on them is this how it should be?

Jan 15, 2008 | 07:11 PM

nyuk98gt

Joined: Dec 2007

Posts: 41

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RE: colder plug more threads?

1fast 99gt:

More threads = less chance of spark plug being blown out of the head! This is not a bad thing. You probably already know but change the plugs only when the heads are cold and torque to spec (do not overtighten or undertighten for that matter).

Chris

Jan 15, 2008 | 08:26 PM

arcticman37

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Joined: May 2006

Posts: 974

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RE: colder plug more threads?

Its also helpful to use some PVC hose to line all the threads up correctly. Just thought I'd throw that in.

Jan 15, 2008 | 09:27 PM

Quicktime_GT

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Joined: Dec 2005

Posts: 2,406

From: Kentucky

RE: colder plug more threads?

from the tip to the spark plug seat should be the same length.

This has nothing to do with why its a colder plug. The way the insulator is made is what determins the heat range of the plug. It does actually mean how "hot" the plug gets, not how much fire it produces.

shoulda went with TR6's

Jan 15, 2008 | 09:54 PM

1fast 99gt

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Joined: Nov 2006

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RE: colder plug more threads?

Quote:

ORIGINAL: Quicktime_GT

from the tip to the spark plug seat should be the same length.

This has nothing to do with why its a colder plug. The way the insulator is made is what determins the heat range of the plug. It does actually mean how "hot" the plug gets, not how much fire it produces.

shoulda went with TR6's

that what i kinda thought the amount of plug in the head is the same. thanks for the help.

Jan 15, 2008 | 09:55 PM

1fast 99gt

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RE: colder plug more threads?

and njk= japan

Jan 16, 2008 | 12:59 AM

97targa

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Joined: Apr 2006

Posts: 3,625

RE: colder plug more threads?

Ford updated the heads from short threads to longer threads to solve the blow out issue. Those plugs are just a "universal" plug. You can put a longer thread plug in ALL heads, but you cannot put a shorter thread plug in longer thread heads! Your fine.