Engine knock/rattle
Thread Starter
Joined: Nov 2013
Posts: 3
From: PA
Engine knock/rattle
My engine recently began knocking/rattling at lower RMPs (
), anyone have any idea what is going on? I recently replaced the intake manifold, but I have no idea why it is doing this. Thanks in advance. 
6th Gear Member
Joined: Mar 2010
Posts: 5,059
From: Wisconsin
I'd like to say it's something simple, but from that video, it almost sounds like bad crank bearings. I hope I'm wrong, as it is hard to say without being there.
How's your oil pressure at an idle with a warm motor?
How's your oil pressure at an idle with a warm motor?
Last edited by 88 orangepeel notch; Jun 19, 2014 at 08:55 AM.
5th Gear Member
Joined: Jul 2012
Posts: 3,628
From: ohio
that actually sounds like the typical 4.6l timing chain rattle when the guides start to get worn.
You could also have a sticking lash adjuster , or even a bad cam follower.
You could also have a sticking lash adjuster , or even a bad cam follower.
Last edited by dawson1112; Jul 15, 2014 at 03:34 AM.
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