Colt3888

alright listen to this ihave never heard of anything like it...my buddy has a2000 gt i was with him when he was driving down the road stoped at a stop light and when he hit the gas again we heard a ticking noise followed by BOOM!! so we pulled over and i told him hes finally goin to get to build his motor haha he didnt think it was funny though anyways i immediatly found the problem.. the coil on cylinder #6 was all "clumped" together and i took it out and the boot was melted to the sparkplug which was no longer in the head!! well it stripped his head so we took it to get tapped and i was wondering if that will even hold under full accelaration or not??? we got it bak and it feels fine anyone heard of this happening??

ponysnake99

yeah something similar happend to another member, his wife was drivin the stang and it blew a spark plug completely out of the head a few blocks from his house...forget how it ended up but i think he got everything fixed...not sure what causes it or how to prevent it though[&:]

Colt3888

im gladhes not the only one. and i was also wondering, if he decides to do it or not, i have my stock heads from my carit is also a 2000 could i just give him my passanger side one or would it be best to replace both of them? that tapjob shouldhold shouldnt it?

CobraStangGT16

Yes it's an unfortunate problem in the 99-00 GT's.

PM me for more information...It happened to me a month ago, same cylinder. I did LOTS of research on the problem. I wouldn't take it to a regular shop to tap it, or swap heads either. Just shoot me a PM and I'll tell ya all about it.

CobraStangGT16

Also check out these threads I started about my problem a while ago.

https://mustangforums.com/m_2534095/tm.htm

https://mustangforums.com/m_2555970/tm.htm

https://mustangforums.com/m_2559237/tm.htm

yoteehunter

A bad COP cause my mothers expidetion do chunk a plug. We pulled the head drilled it out and put a heli coil in.

Colt3888

oh and when we took the plug out it was really messed up the electrode was completly wat seemed like if i took a new one and hit it with a hammer a couple times wat causes that

CobraStangGT16

Yeah the prong on mine was fused to the electrode and melted the threads as well. The cause of that is when the plug was pushed out, it got bounced around really hard in the plug chamber, thats the clicking sound you heard. The electrode was bouncing up and down with the compression and combustion of the cylinder throught the 4 strokes. Thats why it was warped like mine.

Oh and I had Bosche plugs in from the last owner, and that was a big contributer to the problem! ALWAYS USE MOTORCRAFTOR BETTER PLUGS WITH MUSTANGS! I couldn't believe I was runnin the bosches when I pulled them all out to change them.

And always torque them to 15ft-lbs and thread them by hand using a small rubber hose fitted to the top of the plug.

lsustang04

Is this a problem with the 03-04 gts as well?

Colt3888

i dont thinkasmuch,my mechanic told me they fixed the heads in 01 i could be mistaken tho