5.4 Noisy pcv valve
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Mountain Pass
Joined: Mar 2009
Posts: 134
Likes: 2
From: Kansas
5.4 Noisy pcv valve
I have a 2001 f-250 with a 5.4. IT has 115K on it. I heard a weard humming noise under the hood. It sounds like a very noisy fuel pump. I just purchased the truck and it has always made this noise since I had it. I got curious one day and started feeling around. The pcv valve vibrates like crazy. If you pull it out of the engine it still vibrates. IF you put your finger over the end of it the vibrating pretty much quits. The truck runs fine but you can hear the vibrating pcv from inside the cab. Is this normal?
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Mountain Pass
Joined: Mar 2009
Posts: 134
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From: Kansas
Ok how bout this.......anybody got noisy lifters on start up after setting overnight? I thought it was because I used 10W30 instead of 5W20 so I put 5W20 synthetic blend in it and it still does it. I don't know if it is the lifters but it sounds more like lifters than lower end(bearings) more of a light rattle than a deep clatter.
Logistics Pro
Joined: Mar 2002
Posts: 3,881
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From: Wake Forest, NC
could be piston slap. if it goes away quickly or once it warms up. a lot of modern engines do this because of the composition of the pistons.
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Logistics Pro
Joined: Mar 2002
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From: Wake Forest, NC
I would buy this except i've seen lots of the triton pcv valves that are original and plastic hum because they are just bad. I don't think it really matters if it's metal or plastic, if it's not operating right the vacuum draw through it will cause it to vibrate, usually due to deposit build up.
Posting Guru
Joined: Apr 2004
Posts: 1,342
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From: Georgia
I would buy this except i've seen lots of the triton pcv valves that are original and plastic hum because they are just bad. I don't think it really matters if it's metal or plastic, if it's not operating right the vacuum draw through it will cause it to vibrate, usually due to deposit build up.
Just trying to give the OP something to consider.
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