How did you get the compressor out of your car.

Hi Charlene:
A faulty water pump will usually give you some indications.
1) Look for a coolant leak. Not always evident
2) Grasp the fan and see if it will wobble. A bad bearing can happen without the seal leaking.
3) Rattling sound could come from alternator, air conditioning compressor, tension idler, or power steering.
Use a mechanics stethescope or dowel sound rod to CAREFULLY listen to the different parts with the engine running. You will hear the faulty part.

Oh boy.. first you need to remove the huge fan in front after taking the belts off.. the entire fan mount has to be taken off.. you may also need to remove the big bottom pulley off ..drain the cooling system into a huge bucket.. about a 6-8 gallon one. then take any hoses loose.. then unbolt the pump and remove it..if in doubt contact a cat dealer or peterbuilt service..my work on diesels is limited but I could figure it out if I saw it..

check to see if you have vacuum lines hoses loose or cracked if you do re attach or replace , sounds like a vacuum leack

Remove the radiator and have it stripped and rodded out then reassembled by a radiator repairers. They can be blocked badly internally and otherwise look ok.

You need to inspect the exhaust system the catalytic heat shield can make this noise also a missing exhaust hanger can make this noise

Sounds like your fan belt is glazed or loose. At higher speeds the belt slips over waterpump and doesn't drive pump fast enough to circulate coolant. That would be first thing I would check...
Other possibilities: waterpump, blocked heater core, fan clutch.

I cant remember counter or clock wise but doesnt matter I believe it comes off counter clock. The easy way is if you have a air compressor and a air hammer. Take the flat bit place on large nut lightly hit the nut until it breaks free. If not take the largest wrench that fits good and safely tap it hard with a hammer , fast hard blow will break it loose. hope this helps

Well, if it's a 5.0L engine, remove the 4 bolts holding the fan to the pulley. If it's a 4.0L engine, you need to hold the waterpump pulley still and break the nut loose holding the fan clutch to the waterpump. If you don't have a wrench that big, try using a long chisel on the edge of the nut and hitting it very hard with a hammer to break it loose.

the belt cant just up and get too tight,,,did the belt break...a pully maybe locked up and caused it to burn the belt off....waterpumps and ac compressors are known to do that...if the new belt is gripping well it may keep the engine from turning over....

does the elec fan turn on?