Tensioner?

[Cafferty]

My 06 recently lost the tensioner pulley at 80,000. After replacing the pulley I get a wierd noise which seems to happen when the AC clutch kicks in. After looking closely, the tensioner arm moves when the clutch engages and out comes the noise (kind of a clicking not loud but annoying). Just wondering if I need to change the entire tensioner assembly. The belt is staying on, but it makes me nervous as nothing works without the serpentine belt.

 

[Bob4x4]

The tensioner can make noise,if the pulley is worn I change the complete tensioner assy.Be aware that the 06 compressor may be worn/on the way out also.You can use a stethoscope to identify exactly what is making the noise.Be careful you don't want to loose any didgets in the process.

 

[Prairie Dog]

Even by 80K miles the tensioner will be noticeably weaker when compared to a new one. For that reason alone I always replace it as an assembly.

 

[GCuzzy]

I have a 2003 5.9 and just today I picked up a noise under the hood, high pitch sort of. It kicks in above ideal BUT after it warms up goes away. Does this sound familiar with a tensioner failing.

 

[Prairie Dog]

You'll have to do some more checking around to be sure. It could also be the water pump going out or anything else that's spinning.
In fact the first thing I would do is remove the belt and run it a few seconds to see if the sound goes away

 

[Alan Reagan]

When the tensioner pulley bearing went out on my 2005, it was a high pitch squeak/chirp. When I took the tension off the belt and checked the pulley, there was a noticeable amount of play in the bearing. I replaced the assembly and have a spare pulley in the tool box in case I need it. I checked the water pump while the belt was off and it felt fine.