cjbrown2

Alright, so i've been searching the past couple days about changing my plugs. I'm rolling over 120k soon so i figured it's about time to change them out. I've determined that my engine was built after 10/9/07 (mines 03/07/08) so my plugs shouldn't have the breaking problem.

Can anyone point me in the direction of which plugs to use(i know about FoMoCo, champion and brisk) and if i need different plugs than the engines built before 10/9/07

tomb1269

Motorcraft plugs are always the best bet with Fords.

cjbrown2

Soo does that mean i could use motorcraft sp-507 or sp-515?

MGD

Being it's an '08, you may have one of two head designs - confirm by:

COP number 8L3E = MC SP509 one-piece plugs (brown COP boots)

COP number 3L3E = MC SP515 two-piece plugs (black COP boots)

BTW - R&R interval is 60K - yer way overdue - note the gap growth when you pull them.

Don't forget new boots & springs, and proper application of silicon dielectric.

cjbrown2

On a different forum, I read that the sticker on the valve cover give you the manufacture date of your engine, mine being 03/07/08, so it was definitely built prior to Ford making the change. So does that mean the boot color is always a determinate factor? because mine are black (unless my eyes are playing tricks on me)

scobar

iTrader: (4)

Run stock plugs on a stock motor.

techrep

iTrader: (1)

if you do not have brown boots on your COP's you have the old style head's.. the Boot's are longer and are made to be used with the new head design...follow what MGD told you... 120K on plugs good luck getting them out in one piece..

cjbrown2

So if the boots tell me this, does the build date matter at all? From other posts/forums I've read that boot color doesn't always mean old/new style.

MGD

Don't trust the boots? Ok - trust the part # (as listed above) marked on the TOP of the COPS.

OR - trust ye Mark 1 Eyeball and pull the #1 plug fer a 100% confirmation.

You indeed could have done that by now ....

bck4more

Going to be changing mine soon so tell us if ya have any problems