quick help needed

Warriorofice · July 11th, 2008, 07:40 PM

im trying to repair the thread and put an insert for a sparkplug on my 99gt head, and i am wondering which inserts to use, theres a small, medium and long one.

Also i purchase a ngk tr55 and the thread is longer than the original autolite double platinum, is that normal?

thx guys.

andres0286 · July 12th, 2008, 08:41 AM

NGK tr55 are ok, they will go down to were they have to

acmillr · July 12th, 2008, 08:46 AM

Use the long one and measure the distance from the head deck to the top of the spark plug on an existing plug and check the insert depth to assure that the plug isn't in the head too far....

Warriorofice · July 12th, 2008, 12:10 PM

well i did that (used the long one) and the spark plug is higher than the previous one about 3/16. Not sure if it matters, i've put everything back together and the car seems to run fine, except the sound of the car is different ??

what i did: i threaded the spark plug hole with the tap putting grease on it to get most of the shaving. then i vacuumed it to get the rest of the shaving (i hope). then put loctite around the insert and screwed it in. then put anti seize on the tr55 spark plug and got it down on the new insert.

acmillr · July 12th, 2008, 01:13 PM

You should have used the spark plug to screw in the insert and checked the measurement as you went down. Being a little high probably won't matter, but I doubt that the insert is seated properly if it is too high.

Warriorofice · July 13th, 2008, 12:09 PM

oh yeah thats what i did to screw the insert in, the spark plug. still, its about 1/8 to 3/16 higher.

July 11th, 2008, 07:40 PM	#1
Warriorofice Regular 1999 Mustang GT Join Date: May 2008 Posts: 200 iTrader: 0 reviews	quick help needed im trying to repair the thread and put an insert for a sparkplug on my 99gt head, and i am wondering which inserts to use, theres a small, medium and long one. Also i purchase a ngk tr55 and the thread is longer than the original autolite double platinum, is that normal? thx guys.

July 12th, 2008, 08:41 AM	#2
andres0286 Hardcore Enthusiast 2002 Mustang GT Join Date: Mar 2008 Location: Guaynabo, Puerto Rico Posts: 1,027 iTrader: 1 reviews	NGK tr55 are ok, they will go down to were they have to __________________ 2002 GT SOLD 2003 Mustang GT Cobra Clone SOLD Procharged @ 8psi 458 rwhp Mods in Garage

July 12th, 2008, 08:46 AM	#3
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,120 iTrader: 2 reviews	Use the long one and measure the distance from the head deck to the top of the spark plug on an existing plug and check the insert depth to assure that the plug isn't in the head too far.... __________________

July 12th, 2008, 01:13 PM	#5
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,120 iTrader: 2 reviews	You should have used the spark plug to screw in the insert and checked the measurement as you went down. Being a little high probably won't matter, but I doubt that the insert is seated properly if it is too high. __________________

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July 12th, 2008, 12:10 PM	#4
Warriorofice Regular 1999 Mustang GT Join Date: May 2008 Posts: 200 iTrader: 0 reviews	well i did that (used the long one) and the spark plug is higher than the previous one about 3/16. Not sure if it matters, i've put everything back together and the car seems to run fine, except the sound of the car is different ?? what i did: i threaded the spark plug hole with the tap putting grease on it to get most of the shaving. then i vacuumed it to get the rest of the shaving (i hope). then put loctite around the insert and screwed it in. then put anti seize on the tr55 spark plug and got it down on the new insert.

July 13th, 2008, 12:09 PM	#6
Warriorofice Regular 1999 Mustang GT Join Date: May 2008 Posts: 200 iTrader: 0 reviews	oh yeah thats what i did to screw the insert in, the spark plug. still, its about 1/8 to 3/16 higher.

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