MAC cat-back LEAK at the Tips

Draidin · September 24th, 2008, 04:35 PM

Any of you MAC guys out there experience this?

My MAC cat back on the driver side has a lite rattle sound at idle and low RPM (under 2000)
I made sure all bolts were tight. So I take it to the local muffler shop and they say it sounds like a leak. They put my car up on the rack and say it is leaking where the tips connect to the tail pipes. He points to black exhuast scorching on the pipes.
So back home I loosen the clamp and push the tip about 2 inches further over tail pipes and titghten down the clamp. But still no fix.

Any of you guys have this happen or know how to fix it?
Thanx!

Mustang RacR94 · September 24th, 2008, 10:08 PM

does it use bandclamps, sometimes those get messed up... iguess

02gtbangstang · September 24th, 2008, 10:52 PM

having it welded will take care of the problem!

Draidin · September 25th, 2008, 10:13 AM

Yes it does use band clamps.
So a weld does the trick?
Anyone else have to get their tips welded?

~C~ · September 25th, 2008, 10:36 AM

Hmm, I dont have tips on mine. The pipes come straight out of the muffler.....one piece. You could pull them off and put some high temp rtv around the pipe, then slide the tip back over it. Clean it up so it isnt visible and tighten the clamps down good. That should work. Other than that, get them welded.

Draidin · September 25th, 2008, 11:38 AM

I am surprised I am not getting responses from other MAC Mustangs that have or have not had this prob.
I know you MAC guys are out there!

~C~ · September 25th, 2008, 11:40 AM

Originally Posted by ~C~

Hmm, I dont have tips on mine. The pipes come straight out of the muffler.....one piece. You could pull them off and put some high temp rtv around the pipe, then slide the tip back over it. Clean it up so it isnt visible and tighten the clamps down good. That should work. Other than that, get them welded.

Originally Posted by Draidin

I am surprised I am not getting responses from other MAC Mustangs that have or have not had this prob.
I know you MAC guys are out there!

See my garage. I have Mac Catbacks. I HAVE NOT had this problem.

Give it some time.

Draidin · September 25th, 2008, 12:12 PM

Thank You ~C~

RyanGT · September 25th, 2008, 12:16 PM

My tips are welded on. And i dont think thats whats rattling.... would have to be really loose! And i also kinda doubt that an exhaust tip at the very end would make much noise. My catback was rattling on the frame at one point, can check that. Was annoying as hell.

~C~ · September 25th, 2008, 01:24 PM

I guess it doesnt have to be the tips. Did you check them to see if they are loose?

Try this, jack your car up and slide under it. Look at the mufflers and their posistioning in the well. My catback actually touched the side of the well, and it would rattle only at certain points, like in a turn or something. I couldnt figure it out till I saw it. I adjusted them slightly and fixed it. This could be the cause. It didnt occur to me till Ryans post.

Draidin · September 25th, 2008, 01:46 PM

Yeah I did make sure everything was tight and had clearance.
When I heard this "rattle" noise (it happens at idle too) I put my car back on the rack and double checked everything.

Thats when I took it to the muffler shop. There they pointed out that the exhuast leaks where the tips slide onto the tailpipes. There is even black scorch marks on the tail pipes from the leak. They said that is wehre my "rattle" noise was coming from.

Basically I am curious if I was the ONLY one that had ever experienced this.

September 24th, 2008, 04:35 PM	#1
Draidin Regular Mustang GT 2002 & 1993 Join Date: May 2007 Location: Columbus Ohio Posts: 142 iTrader: 0 reviews	MAC cat-back LEAK at the Tips Any of you MAC guys out there experience this? My MAC cat back on the driver side has a lite rattle sound at idle and low RPM (under 2000) I made sure all bolts were tight. So I take it to the local muffler shop and they say it sounds like a leak. They put my car up on the rack and say it is leaking where the tips connect to the tail pipes. He points to black exhuast scorching on the pipes. So back home I loosen the clamp and push the tip about 2 inches further over tail pipes and titghten down the clamp. But still no fix. Any of you guys have this happen or know how to fix it? Thanx! __________________ 2002 Mustang GT + 1993 Mustang GT

September 24th, 2008, 10:08 PM	#2
Mustang RacR94 MM Fanatic 03 mach 1 13.2@109 Join Date: Dec 2006 Location: Mooretownship,PA kinda close to allentown Posts: 3,041 iTrader: 0 reviews	does it use bandclamps, sometimes those get messed up... iguess __________________ 2003 Mach 1, 5 speed U.S. Army - 11B "And on the 8th day god created the infantry and all hell stood at attention"

September 24th, 2008, 10:52 PM	#3
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 265 iTrader: 0 reviews	having it welded will take care of the problem! __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

September 25th, 2008, 10:13 AM	#4
Draidin Regular Mustang GT 2002 & 1993 Join Date: May 2007 Location: Columbus Ohio Posts: 142 iTrader: 0 reviews	Yes it does use band clamps. So a weld does the trick? Anyone else have to get their tips welded? __________________ 2002 Mustang GT + 1993 Mustang GT

September 25th, 2008, 10:36 AM	#5
~C~ ~C~, The Other White Meat! Y2K YellowJacket GT ~TBD~ Join Date: Jun 2008 Location: West side B-More Posts: 1,710 iTrader: 2 reviews	Hmm, I dont have tips on mine. The pipes come straight out of the muffler.....one piece. You could pull them off and put some high temp rtv around the pipe, then slide the tip back over it. Clean it up so it isnt visible and tighten the clamps down good. That should work. Other than that, get them welded. __________________ BLOWN Bumblebeast! 370 rwhp / 381 ft lbs ~Tuned by JJ at WMS "Like the blind man says......We shall see...."

September 25th, 2008, 11:38 AM	#6
Draidin Regular Mustang GT 2002 & 1993 Join Date: May 2007 Location: Columbus Ohio Posts: 142 iTrader: 0 reviews	I am surprised I am not getting responses from other MAC Mustangs that have or have not had this prob. I know you MAC guys are out there! __________________ 2002 Mustang GT + 1993 Mustang GT

September 25th, 2008, 12:12 PM	#8
Draidin Regular Mustang GT 2002 & 1993 Join Date: May 2007 Location: Columbus Ohio Posts: 142 iTrader: 0 reviews	Thank You ~C~ __________________ 2002 Mustang GT + 1993 Mustang GT

September 25th, 2008, 12:16 PM	#9
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	My tips are welded on. And i dont think thats whats rattling.... would have to be really loose! And i also kinda doubt that an exhaust tip at the very end would make much noise. My catback was rattling on the frame at one point, can check that. Was annoying as hell. __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

September 25th, 2008, 01:24 PM	#10
~C~ ~C~, The Other White Meat! Y2K YellowJacket GT ~TBD~ Join Date: Jun 2008 Location: West side B-More Posts: 1,710 iTrader: 2 reviews	I guess it doesnt have to be the tips. Did you check them to see if they are loose? Try this, jack your car up and slide under it. Look at the mufflers and their posistioning in the well. My catback actually touched the side of the well, and it would rattle only at certain points, like in a turn or something. I couldnt figure it out till I saw it. I adjusted them slightly and fixed it. This could be the cause. It didnt occur to me till Ryans post. __________________ BLOWN Bumblebeast! 370 rwhp / 381 ft lbs ~Tuned by JJ at WMS "Like the blind man says......We shall see...."

September 25th, 2008, 01:46 PM	#11
Draidin Regular Mustang GT 2002 & 1993 Join Date: May 2007 Location: Columbus Ohio Posts: 142 iTrader: 0 reviews	Yeah I did make sure everything was tight and had clearance. When I heard this "rattle" noise (it happens at idle too) I put my car back on the rack and double checked everything. Thats when I took it to the muffler shop. There they pointed out that the exhuast leaks where the tips slide onto the tailpipes. There is even black scorch marks on the tail pipes from the leak. They said that is wehre my "rattle" noise was coming from. Basically I am curious if I was the ONLY one that had ever experienced this. __________________ 2002 Mustang GT + 1993 Mustang GT Last edited by Draidin; September 25th, 2008 at 01:46 PM. Reason: typo

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