new headers new problems

mak375 · 04-19-2002, 12:14 PM

I just had new MAC shorty headers installed to finsh my exhaust. after driving for a while i noticed a rattle towards the back of the car, almost like from the trunk or slightly below.

Any ideas what it is or what to do about it?

Also there is a smell...i was told it was just the coating burning off and it would go away...is that true?

whiterod · 04-19-2002, 12:19 PM

maybe when you disconnected the h-pipe from the original headers and installed them on the new headers it might have changed the position of the h-pipe which in turn changed the position of the catback. Exhaust is a funny thing, things cannot bend when you install them, so things must move. Around the catback there is very little clearance as it is around the tailpipes that any slight movement will cause it to rub on something and rattle. And the smell that you are smelling is probably the coating on the headers and it will go away soon.

wildneg · 04-19-2002, 12:20 PM

I had MAC Headers on my other mustang. I don't know about the rattling noise, but I do know it will have a smell for a little while. It does burn off eventually.

- Kevin P
- http://www.techsi.net/kevinp/

mak375 · 04-19-2002, 03:53 PM

i didnt install them.

it seems at thought it doesnt make the noise until i have been driving for a while (10-15 min). When the car is cold i dont notivce any noise. It may just be me.

ultraflo · 04-20-2002, 01:28 AM

Stop by your local Meineke and have them give you a free inspection / check for rattles... You can also go to any other exhaust shop that does free estimates, they should be able to find your rattle for you. When the headers were installed it could have shifted the tailpipe or muffler into a bad spot...

They should be able to take care of it if you can't seem to find it, it could also be the emission tube that runs from the hoses up by the headers down to the h-pipe (if you still run that stuff)

Later

04-19-2002, 12:14 PM	#1
mak375 Registered Member Join Date: Nov 2001 Location: State College, PA Posts: 104	new headers new problems I just had new MAC shorty headers installed to finsh my exhaust. after driving for a while i noticed a rattle towards the back of the car, almost like from the trunk or slightly below. Any ideas what it is or what to do about it? Also there is a smell...i was told it was just the coating burning off and it would go away...is that true? __________________ blk 94 cobra 5spd 3.73 gears steeda tri-ax, flowmaster catback, bassani x-pipe w/ high flow cats, MAC headers, ported and polished intake, trick flow twisted wedge heads, e303 cam, rear upper and lower control arms cold air induction w/ k&n air filter subframe connectors, underdrive pullies, MT ET streets, clear corners, chrome cobra r wheels

04-19-2002, 12:19 PM	#2
whiterod Registered Member Join Date: Sep 2001 Location: zachary, la Posts: 73	maybe when you disconnected the h-pipe from the original headers and installed them on the new headers it might have changed the position of the h-pipe which in turn changed the position of the catback. Exhaust is a funny thing, things cannot bend when you install them, so things must move. Around the catback there is very little clearance as it is around the tailpipes that any slight movement will cause it to rub on something and rattle. And the smell that you are smelling is probably the coating on the headers and it will go away soon. __________________ GT-40X(58cc)heads, cobra upper&lower, FMS 65mm TB, 75mm Bullet, 24# injectors, 190 lph fuel pump, moroso cold air intake, BBK 1 5/8 equal length headers, flowmaster cat back, 1.7 cobra rockers, crane 2031, T5Z gear box, centerforce dual friction, mcleod bullet proof bellhousing, 3.55 gears, hurst billet shifter with over 193,000 miles. thanks to all who contributed

04-19-2002, 03:53 PM	#4
mak375 Registered Member Join Date: Nov 2001 Location: State College, PA Posts: 104	i didnt install them. it seems at thought it doesnt make the noise until i have been driving for a while (10-15 min). When the car is cold i dont notivce any noise. It may just be me. __________________ blk 94 cobra 5spd 3.73 gears steeda tri-ax, flowmaster catback, bassani x-pipe w/ high flow cats, MAC headers, ported and polished intake, trick flow twisted wedge heads, e303 cam, rear upper and lower control arms cold air induction w/ k&n air filter subframe connectors, underdrive pullies, MT ET streets, clear corners, chrome cobra r wheels

04-20-2002, 01:28 AM	#5
ultraflo NX dealer-man Join Date: Sep 1998 Location: Peoria, Illinois Posts: 977	Stop by your local Meineke and have them give you a free inspection / check for rattles... You can also go to any other exhaust shop that does free estimates, they should be able to find your rattle for you. When the headers were installed it could have shifted the tailpipe or muffler into a bad spot... They should be able to take care of it if you can't seem to find it, it could also be the emission tube that runs from the hoses up by the headers down to the h-pipe (if you still run that stuff) Later __________________ RLS Racing! 93 LX 9.20 @ 147mph 03 Mach 1 12.39 @ 116mph

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
TFS heads + MAC headers?	OMAR	Windsor Power	5	09-04-2003 10:11 AM
Headers	oamunoz	Classic Mustangs	9	10-01-2001 10:57 AM
BBK one-piece flange or MAC individual flange long tube headers.	Fox Body	Windsor Power	10	04-03-2001 04:25 PM
Pics of my ported shortie headers	8850	Windsor Power	0	01-28-2001 10:18 AM
Headers?	97GTSTANG	Modular Madness	10	05-22-2000 09:13 PM

04-19-2002, 12:20 PM	#3
wildneg Registered Member Join Date: Jan 2002 Location: Crete, IL Posts: 19	I had MAC Headers on my other mustang. I don't know about the rattling noise, but I do know it will have a smell for a little while. It does burn off eventually. - Kevin P - http://www.techsi.net/kevinp/