Engine knocking noise? - Have video
07-05-08, 02:29 PM
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Engine knocking noise? - Have video (BIG UPDATE)
So for a while I've had this annoying knocking noise coming from the.. valve cover area? It almost sounds like rod knock and only occurs at exactly 750rpms idling.
Any ideas of what this could be? See video for a better idea:
http://s6.photobucket.com/albums/y20...rent=knock.flv
Any ideas of what this could be? See video for a better idea:
http://s6.photobucket.com/albums/y20...rent=knock.flv
Last edited by scfocus; 07-10-08 at 02:42 PM.
07-06-08, 05:53 AM
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deifnetly doesn't sound like round knock.. before you continue driving it i would take off the valve cover and have a look around for anything broken or loose though..
it could be something small broken or loose and driving around could cause it to get stuck somewhere in some moving parts and end up making something small expensive.
it could be something small broken or loose and driving around could cause it to get stuck somewhere in some moving parts and end up making something small expensive.
07-06-08, 02:38 PM
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I'll be taking that off tomorrow when my plugs, vcg's and plug wires arrive.
Also I've been driving it like this forever and nothings really changed.
Any ideas of what to look for?
Also I've been driving it like this forever and nothings really changed.
Any ideas of what to look for?
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07-07-08, 04:41 AM
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definetly don't start it up with the valve cover off, it really won't hurt anything but it will make a huge mess, oil will splash around everywhere.
hopefully you'll see what's causing the problem, i agree though it sounds like it's coming from your timing belt/cam gears area.
hopefully you'll see what's causing the problem, i agree though it sounds like it's coming from your timing belt/cam gears area.
07-07-08, 05:36 AM
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Pull the cam gear cover and check your belt tension. Also check your clutch fan bolts are tight. Might be hitting the shroud.
Sounds like something loose and contacting plastic to me. Not a rod knock, no worries. At worst you'll need a timing belt.
Sounds like something loose and contacting plastic to me. Not a rod knock, no worries. At worst you'll need a timing belt.
07-07-08, 10:56 AM
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I agree, it sounds like the fan may be grazing the shroud..... One of the 2 could be loose.
07-09-08, 10:25 AM
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I took the cam gear cover off to find some black powder (almost like rubber?) on the inside of the cover itself. The knocking noise still continues..
One thing I saw was on the cam gears.. they seem to rotate a little of axis -- like a bent wheel on a balancing machine
One thing I saw was on the cam gears.. they seem to rotate a little of axis -- like a bent wheel on a balancing machine
07-09-08, 01:13 PM
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^ Stop driving your car. The black powder that you speak of is probably your timing belt rubbing on something. Sounds like one of your cam gears is damaged and is altering the timing belts track. Or maybe your off balance cam gear is rubbing on the timing belt cover. You need to find your problem and fix it before you continue driving. Just take the cover off and inspect the inside of the cover carefully. If your timing belt breaks you will have bigger problems. Seeings your SC is a pre 98 without VVTi.