i got my new setup a week ago and i noticed that evrytime i start my truck, water (rust in color) just ooze out of the exhaust until after i drive it for about at least 5 miles then it is dry. this never happened before when i had the oem exhaust.

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2000 Expedition 4.6 3.31 Rear
AIRAID Fipk with Poweraid Spacer
UltraFlow muffler
82 mm Mass Air Flow Sensor
6.8 inch TV with tuner/VCP
Full alarm and Auto-Start
Daytime Running Lights

New Addition:

2001 F150 Supercab 5.4L
3.55 LS
Airaid FIPK
82 mm MAF sensor billet aluminum
Full alarm and auto-start
50 series 3 chamber 3inch in/out Deltaflow Flowmaster
Swept Side style
Beltech 2 inch rear shackles

COMING SOON:
chip (maybe), wheels, pulley, billet grille.

 

It is my understanding that this is completely normal for a large engine with some form of free flowing exhaust. Have you ever sat behind a police edition car? Every time I have been behind one, it looks like a kid peeing out both sides of the rear of the car, no matter how long they have had the engine running. To me it's kind of a cool thing, I think it gives a truck a "mean" look. You don't see a little Focus or Cavalier doing this, only the BIG BOYS! The rust color is normal. The engine gets so hot running that when it cools down, condensation builds up and it starts to rust the metal inside the exhaust. In all the years of having vehicles that do this, I have never had any type of exhaust problem or any problem in general with the system itself, except for the outer rim of the echo tips rusting up a little!

 

thanks adamski, i feel much better. i'll still keep an eye on it. thanks.

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2000 Expedition 4.6 3.31 Rear
AIRAID Fipk with Poweraid Spacer
UltraFlow muffler
82 mm Mass Air Flow Sensor
6.8 inch TV with tuner/VCP
Full alarm and Auto-Start
Daytime Running Lights

New Addition:

2001 F150 Supercab 5.4L
3.55 LS
Airaid FIPK
82 mm MAF sensor billet aluminum
Full alarm and auto-start
50 series 3 chamber 3inch in/out Deltaflow Flowmaster
Swept Side style
Beltech 2 inch rear shackles

COMING SOON:
chip (maybe), wheels, pulley, billet grille.

 

It's perfectly normal. The OEM system has "drain" holes in the muffler so most of the water exits there instead of out the tailpipe.

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1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.

2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires, Smittybilt nerf bars & Line-X bedliner.

NoMo's site

 

yup, that's condensation. that's what you want......it means the motor is in good tune.

 

thanks for the response guys. i think i am gonna paint the inside black to hide the rust coloring its developing.

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2000 EXPEDITION 4.6 3.31 Rear, AIRAID Fipk with Poweraid Spacer, UltraFlow muffler, 82 mm Mass Air Flow Sensor, 6.8 inch TV with tuner/VCP, Full alarm and Auto-Start, Daytime Running Lights

New Addition:

2001 F150 SUPERCAB5.4L 3.55 LS, Airaid FIPK, 82 mm MAF sensor billet aluminum, Full alarm and auto-start, 50 series 3 chamber 3inch in/out Deltaflow Flowmaster
Swept Side style, Beltech 2 inch rear shackles, SUPERCHIP

COMING SOON:
wheels, pulley, billet grille.

 

I hope you mean that you are going to paint the inside of the tail pipe?
If so, make sure to use a paint that is extremely tolerant of heat AND has a rust preventative in it. If I'm not mistaken PPG Prostar makes a paint for this reason. There is also a marine grade paint for engine blocks that has both the prior listed items. I don't know the name of it, but you could probably get it from a boat parts dealer.
Good Luck!

 

I had the same thing happening when I put my Ravin system on. I was considering painting the inside of the tips too, but now you can't see the rust color. I think it's just because it's new, give it a little bit then decide.

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2000 F-150SC 5.4L 4X4ORP
DEEP WEDGEWOOD BLUE
AUTO, 3.55LS, TOW PKG.
RAVIN Z-55 DUAL EXHAUST
CAPTAIN'S CHAIRS,
REMOTE KEYLESS ENTRY
REAR SLIDER
PREMIUM SOUND w/ CD
RHINO LINER
STATE ISSUED UNIV.OF GA. PLATE.
UGA RECEIVER COVER
UGA LICENSE PLATE(FRONT)

WISH LIST:
AIRAID FIPK
SUPERCHIP
TINTED WINDOWS
HOOD DEFLECTOR(PAINTED)

A NATIONAL TITLE FOR UGA(FOOTBALL)
Then maybe when I get more money:

3" BODY LIFT KIT
BIGGER TIRES

etc., etc., etc.

 

Very normal...mine does it every time.

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2000 F-150 XLT, 4x2, 5.4L Supercab, Superchip, Styleside, Black with silver two-tone, 3.55 rear, class III towing package with super engine cooling/auxiliary transmission cooling HD package, Heavy duty shocks, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, factory leather wrapped steering wheel, FORD bedliner, FORD black tubular cab steps, K&N air filter, mar-hyde rubberized undercoating, Modine climate filtration system, Bugflector II, Mobil 1 oil, build 7/2000

 

Make sure you use a good quality paint if
you do paint the inside. I didn't and the
result was more rust in just a few days.

 

The two major byproducts of combustion of a hydrocarbon (gas) are carbon dioxide and water. Initially the water will be in the form of a vapor due to the heat of combustion. As the exhaust travels through a cold exhaust pipe, the water vapor will condense into a liquid and flow out of the tail pipe or drain holes (if provided).

I think this is right.

 

The inside of my pipes are rusted, does this mean that inside my flowmaster muffler is also rusted?

 

Same principle as when you huff your breath on a mirror or eyeglasses. Ya get fog. Same thing's happening inside your tailpipes. But it stops, for the most part, after the exhaust pipes heat up too.