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Old 03-11-2018, 07:49 AM
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Truck has a chirping sound getting progressively louder. Did the screwdriver trick, sounded like the tensioner pulley, but no dice when I replaced it, luckily that's a cheap one. Could be one of the idlers but it really sounds like the AC compressor. The only thing is that the AC works and the noise doesn't change whether the clutch is engaged or not. I'm hoping that's a good sign the AC is actually ok. No abnormal noise that I could hear with the screwdriver either. I think my real question is what can I do to eliminate the compressor as the issue?
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Old 03-11-2018, 08:41 AM
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If it has not already been done, remove the serpentine belt and turn each pulley by hand. You will be checking for anything other than smooth when you turn them. Inspect the belt also.
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Old 03-11-2018, 09:48 AM
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It could be the idler pulley. Not the one on the tensioner. That's pretty common.
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Old 03-11-2018, 12:09 PM
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That's my hope, the one right between the AC and PS. How free should the power steering pump oulley spin by hand?
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Old 03-11-2018, 02:30 PM
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I'm trying to verify which idler pulley is which. I believe the one just below the tensioner is PQR500060 and the one between the AC and PS pump on driver side is PQR101150K
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Old 03-11-2018, 04:43 PM
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Make sure that the power steering pump isn't coming apart. I've seen where the shaft comes partially out of the steering pump which causes belt noise.
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Old 03-11-2018, 09:23 PM
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My ac bearing was so tight it made the belt drag and caused an over heat. The tell tell sign is if the its harder than usual to turn your steering wheel.

I'd replace the other 2 idler pulleys anyway as they all wear at some point.
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Old 03-11-2018, 09:30 PM
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My AC compressor pulley moved pretty freely. I need to check the ps pump and the water pump, but I will probably replace the two idlers, cheap and easy to do.
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Old 03-12-2018, 08:24 PM
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A quick diagnostic tip... get a spray bottle and put some tap water in it. Squirt the belt while it is running and see if you chirp goes away. If it does what you actually might need is just a new belt. Since it is a low dollar diagnostic i would recommend you try it first. It has saved more than a few the cost of some expensive parts they did not actually need.
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Old 03-12-2018, 09:13 PM
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Quote:
Originally Posted by coop74 View Post
A quick diagnostic tip... get a spray bottle and put some tap water in it. Squirt the belt while it is running and see if you chirp goes away. If it does what you actually might need is just a new belt. Since it is a low dollar diagnostic i would recommend you try it first. It has saved more than a few the cost of some expensive parts they did not actually need.
In most cases, spraying anything on the belt will make the noise go away, even if something other than the belt itself is causing it.
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Old 03-12-2018, 09:46 PM
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straight up plain water will only silence the belt for a few seconds. If it is a bearing in the pulley it will not silence a bearing.
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Old 03-14-2018, 10:21 AM
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Worth a try, but the belt is new, maybe a thousand miles on it. Waiting for a little warmth then I'll dig into again
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Old 03-14-2018, 11:19 AM
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Quote:
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Worth a try, but the belt is new, maybe a thousand miles on it. Waiting for a little warmth then I'll dig into again
I have found certain belts just chirp. The water test will tell you quickly however. Again it is free and takes as long at it takes to fill the squirt bottle and open the hood. For those that seem to normally are very sensitive to pulley alignment.
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Old 03-14-2018, 03:14 PM
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If the belt is the problem, you can usually flip it around and the noise will go away.
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Old 03-15-2018, 07:00 AM
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I've seen the belt routed wrong cause the belt to chirp. Post a picture of the belt at the top.
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Old 05-05-2018, 05:47 PM
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I'll get a pic of it later, but it's routed right.

PS pulley turns smooth but not easy. Should it turn freely like the AC compressor or water pump? Water pump pulley has about 1/8" of play up and down but turns smooth and quiet. I might have found a water pump ready to fail, but I don't think it's the source of the noise.
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Old 05-06-2018, 04:52 PM
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Your water pump outer needle bearing is kaputt. PS pulley turns ussually free just like AC and water pump pulleys do
Depending the engine, this 1/8" play can take belt away by running and trouble becomes an overheating trouble....

Regards
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Old 05-06-2018, 10:27 PM
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I've got a water pump and viscous fan clutch on the way. The sound has gotten progressively worse over the past few months and I know that pulley wasn't like that when I did the belt, so maybe under tension the pump bearing is the source of the noise.
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Old 05-19-2018, 06:43 PM
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New water pump fixed the noise but now the truck wants to overheat. Never done that before. Also, tried turning heat on, but no hot air. Must be related, could it be air in the system? System is pressurizing, hoses are hot so coolant is flowing. I'm at a loss On this one
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Old 05-19-2018, 07:05 PM
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Didn't check lower hose, did some reading, hoping this is air in the system, was fine before the pump replacement. Temp got up to 210 when I shut it off. I knew something was wrong once it got into the 190s never gets that's hot unless sitting. Going to let it cool and try bleeding the system again.
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Old 05-19-2018, 07:32 PM
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Definitely air in the system.
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Old 05-20-2018, 01:33 AM
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Where'd you get your WP from? I am having similar problems after replacing my WP and everything else in the cooling system

Quote:
Originally Posted by jsonova99 View Post
New water pump fixed the noise but now the truck wants to overheat. Never done that before. Also, tried turning heat on, but no hot air. Must be related, could it be air in the system? System is pressurizing, hoses are hot so coolant is flowing. I'm at a loss On this one
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Old 05-20-2018, 07:07 AM
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I have to admit to buying a Britpart pump, not genuine. I put so few miles on the truck that I figured I try it. I don't think it's the pump though, this pump may not go another 100k, which I'll never come close to putting on it anyway, but it should work. I have an OBD2 scanner on my dash, so I've always watched my temps like a hawk.
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Old 05-20-2018, 07:20 AM
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Bleed the air from the cooling system.
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Old 05-20-2018, 08:10 AM
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I know that britpart gets a justified bad rap however I've used many of their parts over the years with comparable success rates to other OEM/aftermarket bits. That said, the harder a part is to replace the more likely I am to spend money on a higher quality piece.
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