Best way to find an exhaust leak? - Ford Powerstroke Diesel Forum
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  #1  
Old 11-29-2010, 08:20 AM
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Best way to find an exhaust leak?

I have an 05 6.0 and it's practically deadly to sit in while idling. The exhaust odor is overpowering to the point that my wife won't even ride in the truck and every person that's sat in it comments about it. I'm sick of it too.

I had the exhaust manifold gaskets replaced last month and it helped a little.

Now, I'm thinking there is a leak someplace else. I asked my mechanic about smoke testing it and he doesn't have the equipment to do it (is it even common?).

Other than feeling around, is there a GOOD way to find a leak? I don't want to be throwing $$ at it chasing a ghost.

Also worth mentioning, the smell of exhaust is brutal outside my truck (in the vicinity) I was parked to an 03 6.0 over the weekend and I couldn't even tell it was a diesel. Is there some engine problem that makes exhaust prominent?
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Old 11-29-2010, 08:25 AM
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I'm guessing a cracked up-pipe or Y pipe. They were pretty bad in the 03-04 models, maybe you got one of them on your 05 . If its a Y-pipe, I have a good, used one I'll sell ya

Do you hear any hissing when you're at WOT?
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Old 11-29-2010, 08:36 AM
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I would think my mechanic would have noticed this or looked for it when diagnosing the first time? No? I mean, isn't that stupid obvious?
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Old 11-29-2010, 08:39 AM
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It should be, but the engines are sooo loud when you're laying on top of them, that it may get overlooked
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Old 11-29-2010, 08:40 AM
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Best way I've found to find a leak, is to stick your hand back there when the engine is cooled off, and idleing
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Old 11-29-2010, 08:55 AM
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Couple of other ways of troubleshooting:

1) Open the hood and stand in front of the truck while someone else is behind the wheel. Have them punch the gas pedal and look for smoke (likely will come from the top of the motor, especially if its an up-pipe)

2) Look around the flanges for soot. Might have to clean the pipes first, drive it, and then look


Any other symptoms? Are you seeing low boost numbers? Laggy turbo? Higher than normal EGTs?

If you're not seeing these, its possible that your leak is post tubo (at or after your down pipe going to your exhaust)
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Old 11-29-2010, 12:22 PM
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i have a leak somewere as well and i can hear a hiss sound at idle and driving and when i have my sct turned up smoke comes out from under the hood and stuff you think its y-pipe?
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Old 11-29-2010, 12:28 PM
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Y pipe or the up pipe would be my guess. Try that test I told the OP, but do it fast before things start heating up

I still have that Y-pipe for sale.....
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Old 11-29-2010, 02:01 PM
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I bought some smoke bombs after the 4th of July, and am thinking about using one to test for leaks when the need arises. Maybe put one in my shop vac and blow the smoke into the exhaust and looking for leaks.

Any thoughts on this process?
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  #10  
Old 11-29-2010, 02:07 PM
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well 2006PSDSD if i do find out i need a y-pipe i will let you know for sure
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