|
11-10-2008, 09:07 PM | #76 | |
Torque wins!
Join Date: Dec 2004
Location: Florida
Posts: 13,167
|
Re: Head differences
Quote:
You have a cool car!
__________________
The ORIGINAL Project R build thread is back ! 5.4 32V NA Streetable 404/387 26.56 MPG "I don't like repeat offenders, I like DEAD offenders" Ted Nugent "A big engine hardly working is more efficient than a little engine screaming its head off" Jay Leno |
|
11-12-2008, 08:45 PM | #77 |
Registered User
Join Date: Jul 2008
Location: Owasso, OK
Posts: 140
|
Re: Head differences
As do you, but what about the heads?
|
11-13-2008, 06:32 PM | #78 |
Registered User
Join Date: Sep 2008
Location: trevor, Wisconsin
Posts: 431
|
Re: Head differences
i was board so i pulled a plug. my car was built on 10-10-03 its # 710 of 7182 it also has 9 thread heads
|
11-13-2008, 06:34 PM | #79 |
Registered User
Join Date: Oct 2008
Location: Valdosta,Georgia
Posts: 208
|
Re: Head differences
What day in July of 03? Your heads have the blue stripe on them? Just changed plugs on mine and found out mine are 9 thread heads as well. My car was built on 7/23/03,no blue stripe on heads.
Rob Last edited by CaptHowdy; 11-14-2008 at 08:27 PM. |
11-22-2008, 10:29 PM | #80 |
Registered User
Join Date: Jul 2008
Location: Owasso, OK
Posts: 140
|
Re: Head differences
Mine was early July I don't remember the day. Cant believe I forgot my cars birthday. There is no blue strip on mine either. Let me ask this, is there a difference is the length of the thread on the spark plug between the 2 different heads? The only reason I ask is some people might twist in the wrong plug and cause damage right?
|
11-22-2008, 11:03 PM | #81 |
Mach Underhood
Join Date: Jan 2007
Location: FL
Posts: 1,677
|
Re: Head differences
So....
That was a lot of info..lol Dan, what would be the reason for the ticking noise staying around with the same set of heads on 3 different engines? I helped a buddy swap an Aviator engine in his 1999 GT. He ran Crower 3's and made great power N/A. He then built it with 03/04 Cobra rods, Probe SRS Pistons, and cast crank....engine (cylinder head) still ticked. He then tore the engine apart, rebuilt it, and had some work done to the heads, still retaining the stock guides....but installed +1 valves and had some minor port/chamber work done. The head still ticks to this day. Every mod motor has piston slap? You are basically stating that every shortblock has this problem. I personally have had about 10 different mod motor set-ups and I have never heard one bit of "irregular" noise come from the engine. Several of thoe 10 engines were 4V's. And my current car is a 4V. Thoughts/opinions?
__________________
Stock 4.6 4V, Cobra Cammed: 11.63@117.84 - N/A T45 / 4.56 / Drag Radials - N/A 4V Video |
11-27-2008, 11:55 AM | #82 |
Registered User
Join Date: Oct 2008
Location: Manchester, NH
Posts: 41
|
Re: Head differences
Wow. It has been a while since I checked out this post and was contesting the post about when 8-9 thread plugs had started being used. I also loved the explanation of stiochiometry. I still stand behind my posts. Pistons typically slap when cold not hot, aluminum is extremely conductive, even in an iron cobra motor as they also utilize alumimum heads (same as ours), oil thins out extensively when hot and could be a leading casue of the "dreaded tick" when these motors get hot due to excessive lifter bleed off. Valve guides that are excessivlely worn to the point of ticking typically cause a drop in cylinder pressure. Which I personally have not experienced due to the ticking in our engines, not to mention extremely worn valve guides will cause oil consumption, which isn't apparent either. This isn't to say someone else hasn't seen this but I have not. I want to state for the record that i am not calling anyone on here a liar or incompetent. I am merely stating facts through my 20+ years of experience. I have gobs of experience with mod motors, quad cam mod motors, diesel motors, ohv V-8's, motorcycle engines, marine engines, etc. I am ASE certified in 5 areas of automobile technology, have been through Fords transmission school, etc. My credentials are long and
|
11-28-2008, 11:28 AM | #83 | |
4V GT
Join Date: Apr 2004
Location: MS
Posts: 1,205
|
Re: Head differences
Quote:
|
|
11-28-2008, 11:40 AM | #84 |
Mach Underhood
Join Date: Jan 2007
Location: FL
Posts: 1,677
|
Re: Head differences
None that I know of.....
__________________
Stock 4.6 4V, Cobra Cammed: 11.63@117.84 - N/A T45 / 4.56 / Drag Radials - N/A 4V Video |
01-10-2009, 11:22 PM | #85 | |
Registered User
Join Date: Jul 2007
Location: USA
Posts: 637
|
Re: Head differences
Quote:
Anyway, i have never seen this thread & there is alot of good info in here. But as u can see, my head has the blue paint, & guess what, my engine ticks like no other I have ever heard before. I always noticed it since I bought the car with 30k miles on it. Im not sure if its getting worse, but when I added LT's & took off the cats, the noise got louder & u can hear it come out through the driver side tailpipe... It even got louder after I installed a tubular K member, I guess due to the fact that I dont have a huge chunk of metal blocking the side of the motor anymore which would dampen the noise.... Sometimes, I think its an exhaust leak, but it sounds more like a tick to me??? Its really starting to bug me to the point where I want to fix it, but its honestly not worth the huge expense it would be to rebuild the heads....
__________________
03 Torch Red Mach 1=Born on 4/17/03 Full MM suspension. Full Exhaust. 4.10's etc. Tuned by AED=309rwhp/323rwtq. :12.73 @107: 91 Oxford White LX Notch= 5 lug swap. H/C/I. Stock bottom end. Full exhaust. 3.73's.=300rwhp & 320rwtq. :12.75 @110: |
|
01-24-2009, 04:01 PM | #86 |
Registered User
Join Date: Jan 2009
Location: Chapin S.C.
Posts: 6
|
Re: Head differences
Ok i give up ? What is this head tick issue on early 03 mach 1 "s
|
01-24-2009, 04:05 PM | #87 |
Registered User
Join Date: Jan 2009
Location: Chapin S.C.
Posts: 6
|
Re: Head differences
Ok i give up ? What is this head tick issue on early 03 mach 1 "s
|
02-20-2009, 09:38 AM | #88 |
Torque wins!
Join Date: Dec 2004
Location: Florida
Posts: 13,167
|
Re: Head differences
Poor cooling on cylinders 7 & 8 cause valve guide wear,
and the "tick" is the valve. Much different than piston slap.
__________________
The ORIGINAL Project R build thread is back ! 5.4 32V NA Streetable 404/387 26.56 MPG "I don't like repeat offenders, I like DEAD offenders" Ted Nugent "A big engine hardly working is more efficient than a little engine screaming its head off" Jay Leno |
02-21-2009, 04:02 PM | #89 |
Registered User
Join Date: Jan 2009
Location: cuba mo
Posts: 22
|
Re: Head differences
i have heard that it not so much guide ware as it is the guide getting hot & slipping down & some where hitting valve on one of the other boards there is a big wright up about it & this sounds more like it to me then piston slap
but what do i know ???? |
03-07-2009, 01:55 AM | #90 |
Registered User
Join Date: Mar 2009
Location: California
Posts: 34
|
Re: Head differences
so is the blue stripe on top of the heads or where just curious?
and what if my Mach was made early January or '03 and it does not have the blue stripe? what should i do? |
06-11-2009, 01:55 PM | #91 |
Registered User
Join Date: Jun 2009
Location: Saint Cloud, FL
Posts: 72
|
Re: Head differences
I have read this entire thread, and have learned alot about these mod motors... I also have a ticking noise that resembles both an exhaust leak, a loud injectors, or valve problem! I dont know what it is, and it seems like a lot of people have different theories about with the issue is! My question, that has gone unanswered on this thread is WHAT IS THE EFFECT OF THIS TICKING? Has anyone had their engine damaged due to this ticking, or any gone wrong with out treating this ticking? I would think that if this is a valve issue, or a pistion-cylinder issue, that under hard driving conditions this would digress into a "Holy crap, I just blew my engine" situation! Has anyone in here with the ticking issue allowed it to go untreated and suffered the consequences, or "it keeps on ticking," but she still runs like a Top?! I just purchased this vehicle on Saturday, and noticed the noise, the car only has 13,000 miles on it, and want know if this will damage the car! Thanks!
|
06-11-2009, 02:12 PM | #92 |
1 man Army
Join Date: Apr 2006
Location: Phoenix
Posts: 2,955
|
Re: Head differences
i love threads like this
__________________
Dan |
10-16-2009, 08:17 PM | #93 | |
Registered User
Join Date: Oct 2004
Location: Fla.
Posts: 81
|
Re: Head differences
Quote:
Most all of the new replacement heads sold over the counter had the same problem. Ford specification was .002 max stem to guide cl. the brand new heads were .004-.005+ Also..Piston slap gets worse as the pressure goes up. When the thrust transfers from one side of the skirt to the opposite side of tdc that is where the rattle comes from. This gets really ugly with the big piston to wall clearence some builders seem to like. We tore down a 4V this week and had a suprise. The owner stated the oil fumes were making him sick. This thing had a few thousand miles on the rebuild. The engine had .020 over pistons in a .030 over bore. Some pistons have pin bores offset to help reduce the slap on cold starts. Many new engine designs have the cylinder bores offset in relation to the crank centerline.
__________________
5.4 dohc Cobra. Boss330racing.com Home of the 2004 NMRA factory stock champion. |
|
10-16-2009, 09:03 PM | #94 | |
Love my Mach
Join Date: Apr 2005
Location: Charlottesville, VA
Posts: 13,678
|
Re: Head differences
Quote:
__________________
2003 slowmatic 11.105@117mph w/125 shot of Nitrous best to date Kooks LTsw/OR X, elect cutouts, JLT RAI w/C&L 85 MAH,1" Spacer,PP Lower intake,Accufab TB,160 T-stat,EF Cooling Mod,NX Kit,Mez Electric Water pump,SLP Linelock,FRPP 4.10s-Alum Dif Cover-Alum Driveshaft & SL, Steeda Bumpsteer,MM Alum rack bushings,Deep Alum Tranny pan,Predator,Steeda AUCAs,MM ALCAs, Dspecs,MM CC plates & FLSFCs,MRT Guage cluster,AEM WB,MRT hood struts,Seq TLs, carbon fiber hood/trunk/Cobra wing,220 amp alt |
|
10-16-2009, 09:05 PM | #95 |
1 man Army
Join Date: Apr 2006
Location: Phoenix
Posts: 2,955
|
Re: Head differences
I have seen that a time or two. it kind of makes you wounder what they were doing when they put it together.
__________________
Dan |
10-17-2009, 05:46 PM | #96 |
Registered User
Join Date: Oct 2004
Location: Fla.
Posts: 81
|
Re: Head differences
Hey BP are you a mercury outboard fan.
__________________
5.4 dohc Cobra. Boss330racing.com Home of the 2004 NMRA factory stock champion. |
10-25-2009, 03:13 PM | #97 | |
Registered User
Join Date: Oct 2009
Location: Oh-iO
Posts: 86
|
Re: Head differences
Quote:
I just bought an 03. The sticker on the door says 6/03. So what heads should I have? The 4 thread ones, right? But I count 8.5 turns when removing the spark plugs. So by your statement these are the newer heads? I have no blue stripe on my heads, just a yellow X, i think. I'm not understanding the logic of your simple test. A spark plug for our cars has like 9 threads on it. How would it matter how many threads are in the heads? It still takes 9 full turns to fully seat a spark plug, whether there is 4 threads in the head, or 9 or 5 or 1.... Am i making sense or am i totally missing something? |
|
10-25-2009, 04:04 PM | #98 | |
Registered User
Join Date: Jan 2003
Location: Houston, Tx
Posts: 1,530
|
Re: Head differences
Quote:
Tony
__________________
2015 Ruby Red Mustang GT Premium Bone Stock 03 Oxford White Mach 1 - SOLD 1.72 60',10.932@131.60MPH, 3800# Raceweight |
|
10-25-2009, 04:22 PM | #99 | |
Registered User
Join Date: Oct 2009
Location: Oh-iO
Posts: 86
|
Re: Head differences
Quote:
I have 92k on my engine, no ticking or odd noises whatsever. No blue stripe. |
|
10-25-2009, 07:00 PM | #100 | |
Mustang owner since 1984
Join Date: Sep 2003
Location: Buffalo, NY
Posts: 4,515
|
Re: Head differences
Quote:
__________________
2012 Kona Blue Metallic BOSS MOMS Racing... 11.92@115.43 stock besides drag radials http://www.dragzine.com/news/moms-ra...2013-schedule/ |
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|