Is This True?

Mathos1 · November 5th, 2009, 03:55 AM

I just heard from 3 reliable ford mechanics that our stock PI heads (i have a 2000 GT) have a nasty design flaw, they made them with a 3 thread spark plug pattern, making them very easy to pop out (the spark plugs) due to the fact that aluminum expands and contracts alot and so on and so forth.. ending with a permanent head damage, and having to re-thread the pattern or just replacing the damaged one.

Now i think this was corrected 2001+

How true is this? i hope its not

even over-tightening the splugs would damage them...

NOW, here's my OTHER question... lol
IF i port my heads, would they have a higher compression? making them even more vulnerable to this "thread issue" and tearing those 3 thread spark plug patterns?

Im going crazy now..

DickH · November 5th, 2009, 04:08 AM

I think its 4 threads, but yeah, for a short while ford skipped out on threads for the spark plugs. Just install them with antiseize and don't over tighten them. Although you may see here and there where people blew out a plug, plenty more never have that issue. Having your heads ported shouldn't change your compression ratio.

ForestGRN_Ghost · November 5th, 2009, 04:14 AM

+1
use some antiseize
dont torque the shit out of it.
and it will be fine

SWEET2KSTANG · November 5th, 2009, 09:25 AM

its more a windsor motor issue to my knowledge which is a 99/00 model. it can happen on any head if overtighten'd/not tight enough. as for the compression, it will depend on if/what combustion chamber work is done.

huggy bear · November 5th, 2009, 09:48 AM

like everyone has said it can happen, also like everyone has said just don't hulk those fuckers in or be a vagina when you put them in and you should be fine. I havn't had this issue for about 40K miles

Eagle2000GT · November 5th, 2009, 10:46 AM

I have heard it also happens on Romeo motors. If it does happen you don't to buy new heads. You can use a heliocoil to rethread your old one.

wishIhada5.0 · November 5th, 2009, 11:31 AM

+1...its been known to happen

Dolbs4082 · November 5th, 2009, 12:42 PM

Do the patriot stage 2 heads have more threads? i know that they are based off of the stock heads, just wondering if they would have the same threads?

03_StangGuy · November 5th, 2009, 12:55 PM

Just use a torque wrech when tightening them. I think the torque is like 18 in-lbs. Anyway its not very much an you can easily over tighten them which will wear the minimal threads and eventually cause them to break

AndrewA. · November 5th, 2009, 01:45 PM

ya its easy..had two myself. Heliocoil kit has taken care of them. I would like to do that to the remaining 6. But to be on the safe side ever time i change my oil i just pop off the coil packs and put a wrench on each plug to see if they are loose.

Oakley · November 5th, 2009, 02:36 PM

yeah it happens to all motors. it has done this to me three times in 8 months so far

. im starting to be a pro at putting the inserts in the head. the 4.6, 5.4, and 6.8 has this kind of problem. romeo head blew out #4 plug

Mathos1 · November 5th, 2009, 10:21 PM

Thanks guys, ima look more into that Heliocoil stuff..
Are yall talking bout these here? Heli-Coil ( HeliCoil Inserts ) Helicoils Screw Thread Inserts | Emhart.com

Eagle2000GT · November 5th, 2009, 11:18 PM

Before you get all excited about this issue, I have 130,000 miles on my supercharged motor without a single plug being blown out on my 2000 windsor motor. I hope I haven't jinked myself, but its not as bad as some seem to indicate.

liljojo4711 · November 5th, 2009, 11:54 PM

i have had 1 in 195000 miles

Mathos1 · November 6th, 2009, 01:48 AM

80k here...

Mustang_GTX · November 6th, 2009, 05:17 AM

1 in 87500 here

and made Ford replace my shit under warranty for 50 bux hehe suckers

Mathos1 · November 6th, 2009, 02:47 PM

Originally Posted by Mustang_GTX

1 in 87500 here and made Ford replace my shit under warranty for 50 bux hehe suckers

How? you think i could pull that off too? lol

03SonicBoom · November 6th, 2009, 02:56 PM

Originally Posted by Mustang_GTX

1 in 87500 here and made Ford replace my shit under warranty for 50 bux hehe suckers

It probly cost them less than $50 in parts and labor to fix it and they're saying the same thing to you....."hehe sucker"

pyschopath76 · November 6th, 2009, 03:36 PM

^^

now that is hilarious!! i was thinking the same thing!!

AndrewA. · November 6th, 2009, 05:33 PM

Originally Posted by 03SonicBoom

It probly cost them less than $50 in parts and labor to fix it and they're saying the same thing to you....."hehe sucker"

yup

November 5th, 2009, 03:55 AM	#1
Mathos1 Regular "2k GT" 13.9 Join Date: Jul 2007 Location: RGV Posts: 165 iTrader: 0 reviews	Is This True? I just heard from 3 reliable ford mechanics that our stock PI heads (i have a 2000 GT) have a nasty design flaw, they made them with a 3 thread spark plug pattern, making them very easy to pop out (the spark plugs) due to the fact that aluminum expands and contracts alot and so on and so forth.. ending with a permanent head damage, and having to re-thread the pattern or just replacing the damaged one. Now i think this was corrected 2001+ How true is this? i hope its not even over-tightening the splugs would damage them... NOW, here's my OTHER question... lol IF i port my heads, would they have a higher compression? making them even more vulnerable to this "thread issue" and tearing those 3 thread spark plug patterns? Im going crazy now.. __________________ 2k Silver Gt. SLP LM1 + Straight Pipes/custom hpipe. Ford Racing 3.73's. Custom CAI. - 13.9

November 5th, 2009, 04:08 AM	#2
DickH MM Fanatic 2003 gt 5.4 32v on the way Join Date: May 2007 Location: Omaha Posts: 3,937 iTrader: 2 reviews	I think its 4 threads, but yeah, for a short while ford skipped out on threads for the spark plugs. Just install them with antiseize and don't over tighten them. Although you may see here and there where people blew out a plug, plenty more never have that issue. Having your heads ported shouldn't change your compression ratio. __________________ Before asking a gearing related question click THIS link and enjoy all your saved time. Click here for your tuning needs My slow paced budget 5.4 dohc build

November 5th, 2009, 04:14 AM	#3
ForestGRN_Ghost Enthusiast 99 mustang GT Join Date: Apr 2009 Location: spokane Posts: 993 iTrader: 0 reviews	+1 use some antiseize dont torque the shit out of it. and it will be fine __________________

November 5th, 2009, 09:48 AM	#5
huggy bear Enthusiast 2001 Mustang GT .23333333 minutes Join Date: Aug 2009 Location: Inbetween a rock and a hard place Posts: 536 iTrader: 0 reviews	like everyone has said it can happen, also like everyone has said just don't hulk those fuckers in or be a vagina when you put them in and you should be fine. I havn't had this issue for about 40K miles __________________ 2001 Mustang GT: 10.5 bullit rims, straight pipes, 180 degree t-stat, rear upper control arms, power slot rotors, hawk pads. fml

November 5th, 2009, 10:46 AM	#6
Eagle2000GT MM Fanatic 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 4,730 iTrader: 1 reviews	I have heard it also happens on Romeo motors. If it does happen you don't to buy new heads. You can use a heliocoil to rethread your old one. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

November 5th, 2009, 09:25 AM	#4
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	its more a windsor motor issue to my knowledge which is a 99/00 model. it can happen on any head if overtighten'd/not tight enough. as for the compression, it will depend on if/what combustion chamber work is done. __________________ project warhorse under construction being built by MP2 Performance

November 5th, 2009, 11:31 AM	#7
wishIhada5.0 MM Fanatic 2002 GT, True Blue, Stick Join Date: Feb 2008 Location: About an hour east of Pittsburgh Posts: 3,381 iTrader: 0 reviews	+1...its been known to happen __________________ True blue crew founder/member #1 378/442 rwhp/rwtq...Don LaSota tuned on a Mustang dyno

November 5th, 2009, 12:42 PM	#8
Dolbs4082 I Post Entirely Way Too Much 2005 Mustang GT Join Date: Dec 2008 Location: kansas Posts: 5,390 iTrader: 0 reviews	Do the patriot stage 2 heads have more threads? i know that they are based off of the stock heads, just wondering if they would have the same threads? __________________ MM + Cleavage member #22

November 5th, 2009, 12:55 PM	#9
03_StangGuy I Post Entirely Way Too Much Blown 03 GT Join Date: Jun 2007 Location: Long Island NY Posts: 6,188 iTrader: 0 reviews	Just use a torque wrech when tightening them. I think the torque is like 18 in-lbs. Anyway its not very much an you can easily over tighten them which will wear the minimal threads and eventually cause them to break __________________

November 5th, 2009, 01:45 PM	#10
AndrewA. Hardcore Enthusiast 2001 Mustang GT 8.9@78 Join Date: Jul 2007 Location: DFW Texas Posts: 1,923 iTrader: 2 reviews	ya its easy..had two myself. Heliocoil kit has taken care of them. I would like to do that to the remaining 6. But to be on the safe side ever time i change my oil i just pop off the coil packs and put a wrench on each plug to see if they are loose. __________________ Fire it up, burn it down.

November 5th, 2009, 02:36 PM	#11
Oakley Regular 2002 Mustang GT dont know yet Join Date: May 2009 Location: Roaring Spring PA Posts: 107 iTrader: 0 reviews	yeah it happens to all motors. it has done this to me three times in 8 months so far. im starting to be a pro at putting the inserts in the head. the 4.6, 5.4, and 6.8 has this kind of problem. romeo head blew out #4 plug __________________ 02 GT, Borla Catback and cold air intake Last edited by Oakley; November 5th, 2009 at 02:39 PM.

November 5th, 2009, 10:21 PM	#12
Mathos1 Regular "2k GT" 13.9 Join Date: Jul 2007 Location: RGV Posts: 165 iTrader: 0 reviews	Thanks guys, ima look more into that Heliocoil stuff.. Are yall talking bout these here? Heli-Coil ( HeliCoil Inserts ) Helicoils Screw Thread Inserts \| Emhart.com __________________ 2k Silver Gt. SLP LM1 + Straight Pipes/custom hpipe. Ford Racing 3.73's. Custom CAI. - 13.9

November 5th, 2009, 11:18 PM	#13
Eagle2000GT MM Fanatic 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 4,730 iTrader: 1 reviews	Before you get all excited about this issue, I have 130,000 miles on my supercharged motor without a single plug being blown out on my 2000 windsor motor. I hope I haven't jinked myself, but its not as bad as some seem to indicate. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

November 6th, 2009, 01:48 AM	#15
Mathos1 Regular "2k GT" 13.9 Join Date: Jul 2007 Location: RGV Posts: 165 iTrader: 0 reviews	80k here... __________________ 2k Silver Gt. SLP LM1 + Straight Pipes/custom hpipe. Ford Racing 3.73's. Custom CAI. - 13.9

November 6th, 2009, 05:17 AM	#16
Mustang_GTX Regular 2002 Mustang GT 13.515@102 Join Date: Aug 2008 Location: Chi-Town Posts: 453 iTrader: 3 reviews	1 in 87500 here and made Ford replace my shit under warranty for 50 bux hehe suckers __________________ Mustang Mike

November 6th, 2009, 03:36 PM	#19
pyschopath76 Enthusiast 2004 Mustang GT slow as sin.... Join Date: Aug 2009 Location: Norfolk, VA Posts: 977 iTrader: 0 reviews	^^ now that is hilarious!! i was thinking the same thing!! __________________ JLT Ram Air Intake/Accufab 70mm Throttle Body & Upper Plenum/SLP Longtube Headers/SLP Catted X-pipe/SLP LM1/4.10 gears Military Crew - AZ2(AW) Black Stang Member #6

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