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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters
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Old 05-03-2013, 10:29 AM   #1
cheapstreetduster
 
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Default need help. exhaust leak out intake?

im experienceing an exhaust leak but cant seem to find it..
ive narrowed it down to the pass ..but visually i cant find any leak in the main pipe or headers or header gasket..
is there a part somewhere on the intake that can fail and create an exhaust leak..
im looking at the exhaust gas crossover pipe..it looks fine.
and the egr is located at the front of the motor...
the noise is comming from the back...any advice on an item or part or gasket area that could give me the exhaust leak.?
fwiw..after about 1-2 minutes it goes away. after a cold start up...and im having a hard time finding it in that short period of time.
thanks
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Old 05-03-2013, 10:39 AM   #2
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i should add..it had the crack in the lower weld....the common area where the dehumidifier water drips on it..
i had this dis assembled and rewelded..and a drain line installe on the condensation drain so it no longer runs on the pass side exhaust...
i dont see any visual leaks at this location...it seems to be comming more up like i said at the pass side intake...
and not the header flange...
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Old 05-03-2013, 11:50 AM   #3
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Get some seafoam. Follow the directions for cleaning the intake (putting it in the brake booster vacuum hose) and the smoke should help you find your exhaust leak.
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Old 05-03-2013, 12:31 PM   #4
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Agreed^^^ Get the engine smoke tested. It makes things really easy when you're not able to find a leak. It should only take a few minutes, too!

Shane
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Old 06-11-2013, 06:49 AM   #5
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If its an exhaust leak, get a squirt bottle and fill it with soapy water. Squirt all over the exhaust manifold & manifold to exhaust pipe joint and start the car. If there is an exhaust leak you’ll see bubbles pretty quickly. Good luck...
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Old 06-11-2013, 06:49 AM
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