anyone explain this weird noise?

ryan218 · Nov 24, 2007

i went and had tail pipes put on my mustang friday. my exhaust consists of stock headers, mac pro chamber, flows, then tail pipes...so..on the way back into town ( 80 miles drive )as im entering town i start hearing a whistling type of noise.

when i put the prochamber on a few months ago i had a huge leak..got that fixed and its been fine till now, so i get it home put it on jack stands and check the fit, still tight and centered on the header, so my next thought...maybe the header gasket blew out..so i replaced it...nope still got the noise..and im at a lose i have no idea what it is...i taped a quick vid for you guys to see...

View attachment 346192

any ideas? im out of em?

Roland69 · Nov 24, 2007

it's a leak on the passenger side. could be a header gasket or the flange connection may be a little loose

ryan218 · Nov 24, 2007

Roland69 said:
it's a leak on the passenger side. could be a header gasket or the flange connection may be a little loose

checked both replaced header gasket....still there....it seems to get louder the longer it runs?

Roland69 · Nov 24, 2007

check your plugs. maby one is loose and air is blowing around it

Roland69 · Nov 24, 2007

also check your fan and make sure it's not hitting the shroud

ryan218 · Nov 24, 2007

Roland69 said:
check your plugs. maby one is loose and air is blowing around it

Roland69 said:
also check your fan and make sure it's not hitting the shroud

k ill check both!

ryan218 · Nov 24, 2007

checked both....there both fine.

:sad:

ryan218 · Nov 24, 2007

could it be the EGR ont he back of the head?

bloopbloob · Nov 24, 2007

i think it's probably the f150 radio.... dont worry about it!

j/k. what have you done to your smog equipment?anything? i'd check the tubing that comes out of the back of the heads, and follow it checking for leaks...
what area does the noise seem to be coming from?

on a side note, when i ordered my (chrome) bbk LT's, the welds on the flange to tubing had holes in them! big holes, that you could see through!(a couple, between 1/16 and 1/8 of an inch! I couldn't believe they sent them out!)
if i hadn't noticed before install, i would have been so pissed to find out after. i wish i would have took pics...
anyways, i'm a (part time) welder, so it wasn't a big deal, but that may be something else to look into. check the welds. even if there weren't holes upon install, if it was a bad weld, it could have been a very thin seal, which eventually blew out or corroded somewhere. just a long shot, but if you cant think of any other possible reason, it may be something to check.

ryan218 · Nov 24, 2007

bloopbloob said:
i think it's probably the f150 radio.... dont worry about it!

j/k. what have you done to your smog equipment?anything? i'd check the tubing that comes out of the back of the heads, and follow it checking for leaks...
what area does the noise seem to be coming from?

on a side note, when i ordered my (chrome) bbk LT's, the welds on the flange to tubing had holes in them! big holes, that you could see through!(a couple, between 1/16 and 1/8 of an inch! I couldn't believe they sent them out!)
if i hadn't noticed before install, i would have been so pissed to find out after. i wish i would have took pics...
anyways, i'm a (part time) welder, so it wasn't a big deal, but that may be something else to look into. check the welds. even if there weren't holes upon install, if it was a bad weld, it could have been a very thin seal, which eventually blew out or corroded somewhere. just a long shot, but if you cant think of any other possible reason, it may be something to check.

dont hate ont her radio..it works!

these are stock headers... i replaced the gaskets today but that didnt help..the header bolts were brley finger tight though lol...i TQ ed them down after some fel pro gaskets..um well nonthing has reallt been done to EGR..but when i put in the pro chamber the EGR tube that comes down i pulled down some to attach to my pro chamber..so maybe i broke it a while ago and its just startd leaking today?..

so since this gives me a reason to get rid of my EGR **** whats to do?

what all can go and what needs to stay? about the back of the heads? what do i do about them?

Hickfied · Nov 25, 2007

get a small hose, start your engine, put one end of the hose to your ear and then try and find where the sound is coming from.

ryan218 · Nov 25, 2007

Hickfied said:
get a small hose, start your engine, put one end of the hose to your ear and then try and find where the sound is coming from.

k ill try it.

PUNISHER RACING · Nov 25, 2007

it is your polution pump hose that goes to h pipe

ryan218 · Nov 25, 2007

PUNISHER RACING said:
it is your polution pump hose that goes to h pipe

already checked that.

ryan218 · Nov 25, 2007

well i did check it but could it got piched or somthing? becasue its connected at both ends?

Roland69 · Nov 25, 2007

could be a hole by the collector on the header. my stock ones blew a hole so I bought new ones

ryan218 · Nov 25, 2007

Roland69 said:
could be a hole by the collector on the header. my stock ones blew a hole so I bought new ones

what were you doing when they blew? i was on the brake slowing down when this happend? right after the trans shifed down it happend...

baldy1 · Nov 25, 2007

It is an exhuast leak. Check your O2 sensors. Maybe one is cracked. One way to find out where its coming from is when its cold start the car up and put your hand around every part of your exhuast you will feel the air blowing out. Put it around header at the collector and check the O2 sensor. Trust me you will feel it. Do it fast so you wont get burned

ryan218 · Nov 25, 2007

baldy1 said:
It is an exhuast leak. Check your O2 sensors. Maybe one is cracked. One way to find out where its coming from is when its cold start the car up and put your hand around every part of your exhuast you will feel the air blowing out. Put it around header at the collector and check the O2 sensor. Trust me you will feel it. Do it fast so you wont get burned

ive done this....i cant feel a thing!...at first when i happend i was thinking maybe it was something with the valvetrain? but its still runing great?

fkurls1 · Nov 25, 2007

sounds to me like your airpump tube at the back of your cylinder heads has a rust hole in it. you may not be able to see it from the engine compartment, but if you get under the car and look up toward the bellhousing and the back of the heads you mite find it!

anyone explain this weird noise?

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