My 01 D2 has a loud whining noise from the front top? of the engine. Changes with RPMs. If I were guessing I'd say it was a pulley somewhere in the serp loop.
Is there a common one that goes bad? My belt is looking old, i may be looking to replace that anyway, so is there anything else I should do with it?
Thanks!

 

There are 2 idler pulleys and a belt tensioner. Looks like this> Land Rover Belt Tensioner Kit: Discovery 2 And Range Rover P38


1 Idler lives under the belt tensioner and the other under AC compressor. Like this> Serpentine Belt Routing Diagram For Discovery Series 2


And a vid> How To Replace Serpentine Belt On Discovery 2

 

After having a idler fail on the interstate and strand me, I replaced both idlers and the tensioner.

I recommend the same.

 

Thanks for the info!
So you think that is the likely culprit? Seems like a worthwhile thing to do on the next warm day since I notice some small splits starting in the belt.

 

I'll add that these trucks seem prone to belt squeal. I switched to a Goodyear Gatorback and it hasn't squealed since. I got mine from amazon.

 

Not really a squeal so much as a whine. Like a dry bearing.

 

usually, you can briefly quite the noise by systematically squirting some lube (wd40 or the likes) in the bearing. this will let you pin point the culprit.

 

feeling like it might be coming from the a/c compressor??

 

Could be the compressor. Another [more dangerous] way to diagnose these issues is to start the truck and place one end of a long tool against the compressor. Put your thumb over the other end of the tool and press your ear against your thumb. You'll hear a whine if the compressor has a bearing failing. If you don't hear a whine, you can try to push the tool against other accessories and pulleys to find it.

If the comp is bad, contact Paul Grant for a used one. He's a good dude, I've bought several things from him.

 

I wish you gangstas would lay off the ear/stick business. it works but you can get an auto stethoscope for way less than $10.