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Under load
I have a 2000 F-250 PSD automatic. When pulling in overdrive up a hill, before it shifts out of overdrive, I hear a clicking noise. As soon as it shifts down, the noise goes aways. It almost sounds like the engine is lugging. It has done this since it was new, 63K ago. Any ideas or concerns?
Thanks, Chad
Thanks, Chad
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Yes - or no. It depends. If a leak is located where exhaust regularly gets into the cab, then it is a problem. Carbon monoxide poisoning can creep up on you. Even if that doesn't happen, exhaust is unhealthy.
I'd find out where it is. If it is just in front of the muffler, under the cab, I wouldn't be too concerned. Of course, that would be a good excuse to put on a nice 5-inch exhaust (or 4-inch).
If it is at the manifold, Y-pipe, or around the turbo, it needs to be fixed as soon as possible. Leaks in those locations can find their way into the cab.
Secondarily, leaks before the turbo (or close after it) may affect how the engine runs.
NOTE - apparently, Y-pipe leaks are a very common problem for the 6.0. Just one of many.
I'd find out where it is. If it is just in front of the muffler, under the cab, I wouldn't be too concerned. Of course, that would be a good excuse to put on a nice 5-inch exhaust (or 4-inch).
If it is at the manifold, Y-pipe, or around the turbo, it needs to be fixed as soon as possible. Leaks in those locations can find their way into the cab.
Secondarily, leaks before the turbo (or close after it) may affect how the engine runs.
NOTE - apparently, Y-pipe leaks are a very common problem for the 6.0. Just one of many.
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I just put on a 4" exhaust a couple months ago. The sound was present before the mod and is still there and seems to be amplified. Based on this, the leak must be before the turbo, right?
Thanks, Chad
Thanks, Chad
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I called a diesel shop and he thought that if it was a exhaust leak it would be present when you first start it up. He also thought if it was an exhaust leak, why does the noise disappear when the engine shifts down. He thought it was just a transition point between OD and D where the engine is lugging. He suggest shifting out of OD when coming to a hill. Pulling hills in OD really heats up the tranny. Just wanted to relay his thoughts and see if anybody has any comments.
Thanks, Chad
Thanks, Chad
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I have no experience with exhaust leaks in diesels. But I've had plenty of exhaust leaks in gassers. I've had exhaust leaks that were there all the time, and I've had some that were quite noticeable at low RPMs under load, but when I'd downshift, there would be less load and the exhaust leak was no longer noticeable - still there, but not apparent. Maybe? Maybe not.
I do agree with him on the OD point, though. Don't lug your diesel. Yes, they make lots of torque waaaay low down compared to gassers. That doesn't mean they enjoy being lugged.
Notice the big rigs - they NEVER lug their engines. Always operate an engine in the range it was designed for. Sure, light loads, you can loaf a PSD at 1500 rpms, no problem. But with a heavy load, the engine needs to rev more. You won't hurt it running it at 2500+ rpms all day long. Granted, your fuel mileage won't be great, but the point of hauling a load is to get it there.
When I pull a motorcycle trailer with my truck, I don't even know it is there. OD is fine.
When my brother hauls 13k pound loads with his F350, he locks out OD.
I do agree with him on the OD point, though. Don't lug your diesel. Yes, they make lots of torque waaaay low down compared to gassers. That doesn't mean they enjoy being lugged.
Notice the big rigs - they NEVER lug their engines. Always operate an engine in the range it was designed for. Sure, light loads, you can loaf a PSD at 1500 rpms, no problem. But with a heavy load, the engine needs to rev more. You won't hurt it running it at 2500+ rpms all day long. Granted, your fuel mileage won't be great, but the point of hauling a load is to get it there.
When I pull a motorcycle trailer with my truck, I don't even know it is there. OD is fine.
When my brother hauls 13k pound loads with his F350, he locks out OD.
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From: Rio Rico, AZ.
Originally Posted by schlichtemeier
I called a diesel shop and he thought that if it was a exhaust leak it would be present when you first start it up. He also thought if it was an exhaust leak, why does the noise disappear when the engine shifts down. He thought it was just a transition point between OD and D where the engine is lugging. He suggest shifting out of OD when coming to a hill. Pulling hills in OD really heats up the tranny. Just wanted to relay his thoughts and see if anybody has any comments.
Thanks, Chad
Thanks, Chad
Look at the area where the manifolds bolt up to the heads, and where the manifolds join the up-pipes to the turbo. If there is a leak you will see a black stain where it's coming out. It won't be a huge smear, just a small black area in the immediate area surrounding the interface.
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I drove a vac-hauling truck with the 466 in it one time, and the intake manifold lost 2 bolts closest to the cab, it ran perfectly normal, but it you ever pushed the throttle wide open, i guess it had just enough pressure to open a gap, and all of a sudden, the engine went from regular diesel clatter noise, to jet engine right in front of me noise.
If you describe a clicking sound, i would think that mabye an exhaust manifold has come loose, or i also know that if you have a worn drive shaft, they can make a variety of wierd noises and vibrations.
I dont think (but i'm probably wrong) diesel engines have the exhaust "note" to make a clicking sound as do gassers.
If you describe a clicking sound, i would think that mabye an exhaust manifold has come loose, or i also know that if you have a worn drive shaft, they can make a variety of wierd noises and vibrations.
I dont think (but i'm probably wrong) diesel engines have the exhaust "note" to make a clicking sound as do gassers.
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