Exhaust

[Philip64]

I have a 05 f350 with 6.0 diesel. May sound stupid but new to diesel. I have recently noticed that the exhaust coming out of tail pipe is very weak. and I have a very loud shrill whistle coming from ( I think) the rear part of the engine. Does a diesel have a catalytic converter and if so could this be the problem? If the converter is stopped up can I replace it with a straight pipe without any problems other than being illegal. Little over 94k miles. Thanks for your time and help

[SixStringMadness]

a 6.0 exhaust does not sound "diesel like" at idle due to the VGT turbo. It will right at start up, and turn into a "jet type" sound as the vanes adjust based on programming. I really like the sound of a 6.0 exhaust, but to really hear it while driving, you generally have to be next to something solid like a concrete barrier or building, and heavy throttle.

the '03's have a very loud turbo because they have less vanes that the newer (louder, higher pitch jet sound - YouTube it), so if yours is loud like that, someone may have done an '03 turbo swap, which is not unheard of.

Ultimately to answer your question, it would be easier if we understood what you meant by your ".......exhaust coming out of the tail pipe is weak"

Are you talking sound wise, or do you think it has blockage of some sort maybe in the catalytic converter and causing power loss.

[Philip64]

What I mean is the pressure of the exhaust seems to be very weak and I am also getting exhaust fumes when idling in the cab. I checked the heat on the converter and then back on the tail pipe and it feels the same so I really think it may not be the converter now. I have visually checked for leaks but have not found any. could it be the turbo? the engine also sounds louder to me

[joe_r_dog]

Originally Posted by Philip64

What I mean is the pressure of the exhaust seems to be very weak and I am also getting exhaust fumes when idling in the cab. I checked the heat on the converter and then back on the tail pipe and it feels the same so I really think it may not be the converter now. I have visually checked for leaks but have not found any. could it be the turbo? the engine also sounds louder to me

i doubt turbo. sounds like a cracked y pipe. if u dont have emissions testing in ur area, do an egr delete and put on a 4in turbo back exhaust. also, get some gauges to monitor ect and eot.

[SixStringMadness]

Originally Posted by Philip64

What I mean is the pressure of the exhaust seems to be very weak and I am also getting exhaust fumes when idling in the cab. I checked the heat on the converter and then back on the tail pipe and it feels the same so I really think it may not be the converter now. I have visually checked for leaks but have not found any. could it be the turbo? the engine also sounds louder to me

Its a Ford TSB that the 6.0 engine develops exhaust leaks at the headers. They make a gasket for this. You may want to look into this...

[Philip64]

I have found part of my problem, The pipe that comes out of the driverside exhaust manifold up to the ,( I think the turbo ) has a leak in what I would call a metal expansion joint. What is this pipe called? This is probably where I am getting the loud shrill whistle and also where I am losing exhaust pressure and why the exhaust is coming up into cab. Looks to be very hard to get to

[mint-6oh]

That is the left side turbo inlet pipe or y-pipe. Once the turbo is out its not that bad to do

[Philip64]

Thanks for the help. So the Y pipe comes in 2 pieces, left and right, also what is an EGR delete and how do you do that? Remember I am a DumbA__ on diesels

[mint-6oh]

Only the left side is a y-pipe. The turbo inlet pipes are 2 pieces, The right side is shorter and straight. An Egr delete removes the Egr cooler so you no longer have exhaust flow to the valve. You don't have to worry about the cooler leaking or the valve sticking. Get the delete kit that comes with the r/s inlet pipe and install it when you do the left side. It's a good idea to clean the turbo whle you have it off.

[Philip64]

can we post pictures on here? if so I will take 2 pics and post to make sure old DumbA here has got correct parts