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Rattling Maybe Knocking Sound?
Posted 22 May 2007 - 07:57 PM
Its sounds like a rumbling almost at idle. As the throttle is opened, the sound gets quieter until the throttle is closed, then the noise is really loud as the engine decelerates.
Its none of the accessories making noise. There's plenty of oil. Depressing the clutch pedal does not change the sound at all.
I'm kinda really at a loss here.
Posted 22 May 2007 - 08:39 PM
Video of sound engine is making (you'll enjoy it if you have a hand fetish)
Posted 22 May 2007 - 10:02 PM
Can you localize the source of the noise at ALL? try using a piece of tubing in one ear, and block the other ear shut.. fish the tubing around and see if its louder in any areas....
It REALLY sounds like a fried fan clutch, or tensioner bearing.. but the bearing theory doesnt hold much water, as it would put a fairly decent load on the engine by seizing... is your engine effected by this "noise?"
Are you certain that depressing the clutch pedal is disengaging the clutch? clutch works fine, right?
Posted 22 May 2007 - 10:14 PM
Clutch action works fine.
The noise is pretty loud, so I'm having trouble localizing it.
Posted 22 May 2007 - 10:41 PM
Posted 22 May 2007 - 11:58 PM
Posted 23 May 2007 - 01:07 AM
call or pm me if you want/need a hand/ and or spare vehical, ************, man
Posted 23 May 2007 - 05:11 AM
Consider a loose flywheel,suddenly sloppy disty/damaged drive gear and non-disengaging starter too.
After hearing it again,it sounds too loud to be the turbo.Sounds more like a foreign object caught between a piston and head.Seems like the noise might be at twice the frequency of the ticking valve.Hope I`m wrong.
Posted 23 May 2007 - 07:07 AM
$5.99. This one, you could use both as an air-based stethoscope, for finding vacuum leaks, AND a solid, "touch it to the engine and find your noise" type scope.. I do not own one, but I have used one and I have used improvised "stethoscopes" more times than I can remember.
Posted 23 May 2007 - 11:23 AM
could be the turbo bearings as others suggest, but I'm not hearing the delay I'd expect to hear after the throttle was closed and the engine idled back down, if the turbo had spun up it'd still be spinning down after the engine returned to idle..this sound is tracking engine rpm almost linearly..
Posted 23 May 2007 - 11:34 AM
Its not an engine related sound as I've known them. Rod knocks kinda sound like a midget with a ball peen hammer pecking, main knocks sound like a midget with a rubber mallot thumping.
Posted 23 May 2007 - 07:41 PM
Two possibilities- bad turbo, or bad cat, just going by sounds. If it was an internal noise, it would have come apart by now.
Posted 24 May 2007 - 06:58 AM
Posted 24 May 2007 - 10:31 AM
My thought is something in the bell housing may have rattled loose. Like a flywheel bolt, or p-plate bolt. I don't remember anything about an inspection plate, though I'll look and see if that could be it too.
Turbo seems unlikely to me, because the noise matches the engine speed. There isn't any lag at all (which I think there would be?).
I'm off to Illinois for a week, so I'll tinker with it when I get back.
Posted 04 June 2007 - 07:59 PM
All but one of the flywheel bolts were loose. I originally tightened 'em all down to specs on torque. My torque must not be all that accurate
This time, I'm gonna use loc-tite on them.
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