Old ears, new problem
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Old ears, new problem
2003 F-250 CC 4x4-5.4 V8-165K mi., looking for some help.
I never thought I'd be on the asking end of this kind of deal but my ears are getting old and this is something I haven't encountered.
In the Winter when temps are low, I used to get a howling sound out of the front of the engine. It went away almost immediately after the truck had run for 30 seconds. That noise is now gone and I always laid it off to a cold alternator or pulley bearing.
Yesterday, I started to hear a "tick" that would increase in frequency with RPM when the engine was started or fully warmed. At idle, at stop signs, the tick will sometimes subside or even cease, momentarily.
This tick seems to be in front of the engine and, at first, I thought it may be a failing fan clutch or a fan blade hitting the shroud. Now, I'm not so sure. I don't believe this is an injector or exhaust leak as it seems located outboard of the front of the engine.
I plan to replace the serpentine belt and can start the engine without belt to eliminate the water pump as the cause when I do that, although I have no coolant leaks and temps are OK.
Has anyone experienced a front of engine noise like described or have a diagnostic flow that will help me locate the problem? Thanks in advance for any help.
I never thought I'd be on the asking end of this kind of deal but my ears are getting old and this is something I haven't encountered.
In the Winter when temps are low, I used to get a howling sound out of the front of the engine. It went away almost immediately after the truck had run for 30 seconds. That noise is now gone and I always laid it off to a cold alternator or pulley bearing.
Yesterday, I started to hear a "tick" that would increase in frequency with RPM when the engine was started or fully warmed. At idle, at stop signs, the tick will sometimes subside or even cease, momentarily.
This tick seems to be in front of the engine and, at first, I thought it may be a failing fan clutch or a fan blade hitting the shroud. Now, I'm not so sure. I don't believe this is an injector or exhaust leak as it seems located outboard of the front of the engine.
I plan to replace the serpentine belt and can start the engine without belt to eliminate the water pump as the cause when I do that, although I have no coolant leaks and temps are OK.
Has anyone experienced a front of engine noise like described or have a diagnostic flow that will help me locate the problem? Thanks in advance for any help.
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Good guess on the pump but that wasn't the issue. I discovered what it was and the machine gun that was under my hood is gone.
Turns out it was the serpentine belt tensioning pulley. Out of the original 15 ***** in the bearing, 8 remained. I replaced the pulley and the belt and all is well now. The race of the bearing faces the engine and is covered on the front side by the pulley. That must have been giving me the misdirection of sound. I observed the pulley wobble just a bit when running and put my finger on the arm of the tensioner to confirm that the tick was being generated by the pulley.
Altogether, about a 15 minute fix at 5f, if it was warmer, it would have taken longer.
Turns out it was the serpentine belt tensioning pulley. Out of the original 15 ***** in the bearing, 8 remained. I replaced the pulley and the belt and all is well now. The race of the bearing faces the engine and is covered on the front side by the pulley. That must have been giving me the misdirection of sound. I observed the pulley wobble just a bit when running and put my finger on the arm of the tensioner to confirm that the tick was being generated by the pulley.
Altogether, about a 15 minute fix at 5f, if it was warmer, it would have taken longer.
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