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  #1  
Old 01-22-2011, 11:06 PM
pickupman pickupman is offline
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Default Fixed Squeaky Noise At Idle!

I just bought my "new" Dodge Ram 1500 SLT Laramie Club Cab last weekend and I love it! But... a few days after I brought her home she started this squealing / whining noise at idle. At first I thought it was the tensioner pulley sticking and not putting enough tension on the serpentine belt because it felt a little sticky and did not spring back as it should. I then found a wrench and grabbed hold of the nut that holds it on (CAREFULLY! I like my fingers just the way they are!) and put some tension on it while the engine was running, there was no change in the noise. Then I proceeded to take the serpentine belt off, started the engine, same noise. My next guess was that the pcv valve was whistling and bad so I took that off and did the shake test and it seemed to be ok. Luckily, while the engine was running, I pulled the oil dipstick out a little to check for a vacuum leak and there was A LOT of vacuum on that thing. Where is my vacuum leak coming from? I checked the bolts holding the valve covers on and I found that about 1/2 of them were pretty damn loose so I thought ah ha! I found it! But... I started the engine again and the noise was still there! I finally went to Autozone and bought a new PCV valve and breather filter to see if it was really the PCV valve. I put the new PCV valve in in the parking lot and then I moved to the drivers side to replace the breather filter. I took the filter off and disconnected the hose from the intake to the breather and A TON of debris fell out! The hose and the filter were completely plugged up by those small pinecones and various other tree droppings. I put my new filter back in with the clean hose and NO MORE SQUEALING/WHINING NOISE!!! But now I have a rattle coming from the engine compartment and haven't had a chance to look into it yet. It doesn't sound too serious and I'm thinking it's probably a loose heat shield or something. Any more ideas? THANKS!!!
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Old 01-23-2011, 09:09 AM
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I'm not sure about the rattle but vacuum in the crankcase means you have a blown intake plenum pan gasket. This will cause oil consumption and can lead to misfiring.
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Old 01-23-2011, 11:37 AM
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As far as I know, a small amount of crankcase vacuum is normal due to the small amount of blow by of the pistons etc. and a large amount is due to a vacuum leak or blockage in the system. As soon as I replaced the breather filter and cleared out the hose leading to it the vacuum dropped down dramatically to what I consider an acceptable level.
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Old 01-23-2011, 11:54 AM
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You and Dodge have a difference of opinion. http://www.ramforumz.com/showthread.php?t=46305
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Old 01-23-2011, 12:20 PM
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A blown plenum gasket is not uncommon on these engines . Check and see if you have oil puddling in the bottom of the intake , by opening up the throttle body with the engine off . You will need a flashlight to peer through to the floor of the manifold . If theres oil present , you'll need to take care of this soon . I see Randy has already sent you the procedure .
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Old 01-23-2011, 12:33 PM
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I also see your a newbie here . Make sure you stop by the newbie section and introduce yourself .
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Old 01-23-2011, 12:52 PM
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I will check for oil puddling today, thanks for the replies!
I'll post in the newbie section soon!
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Old 01-23-2011, 12:55 PM
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I will also hook up a vacuum gauge to my breather hose and check for vacuum there as described in the link
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Old 01-23-2011, 01:02 PM
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Keep us posted on your findings .
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Old 05-24-2011, 12:57 AM
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Default

So... I was in denial about having to replace the intake plenum gasket so soon after buying the truck but I finally got around to it. Here are some pics showing what I found. Yikes! It was completely blown out! Here's some pics.
Attached Images
File Type: jpg 132.jpg (132.7 KB, 18 views)
File Type: jpg 133.jpg (131.6 KB, 17 views)
File Type: jpg 134.jpg (127.5 KB, 18 views)

Last edited by pickupman; 05-24-2011 at 06:52 PM. Reason: moved question to new thread
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