E39 M5 -- Not a rod bearing noise...
Uploader Comments (shep89)
All Comments (11)
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thanks you for your video. my car mad the same sound. so today i check my spark plugs.
i found two loss spark plugs. then i tighten them. then no more taking sound ;-)
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@shep89 Good to hear! These are such lovely cars, aren't they!
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It's not VANOS..
If it was VANOS, you'd hear it when the camera was at the top of the engine.
It *could* be the start of a rod bearing going bad.. but *if* it is, then youve caught it VERY early and your chances are that the crank is fine.
However.. Rod Bearing noises are usually deeper than that.
This sounds more like a tapping than a knocking. Rod Bearing knock is a deep, heavy sound.
It could be an exhaust manifold leak; or a cam lobe; or a bad hydraulic lifter.
But get it checked soon!
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Ce bruit ce sont les vanos abimés.
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I have a similar sound in my 350Z. Shep, please check your private messages
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noise seems like its coming from the vanos...
How's the car running now?
You say it was just the spark plugs?
ANiMOSiTYZA 10 months ago
@ANiMOSiTYZA Yeah it was just one loose spark plug. I've put on probably about 8,000 miles without any issues.
shep89 8 months ago
So this is what happens when you read M5Board too much. Got it up on a lift at a shop by my house and we thought it may have been an exhaust manifold gasket. I took it to the guy who worked on my old M5 a bunch -- he figured out that it was a spark plug somewhat loose in there. Tightened it up and the sound went away! Not an expensive problem at all, haha.
shep89 1 year ago
PUSH THE CLUTCH PEDAL IN IF IT STOPS THEN ITS YOUR TRANNY BUT IT SOUNDS TO ME LIKE THE VANOS SYSTEM IS GOING BAD.
Hoodrichbiatch 1 year ago
@Hoodrichbiatch Thanks. Tried that out -- it doesn't stop. It sounds more like it's coming from the back and down low in the motor, not from the VANOS units. But we'll see soon.
shep89 1 year ago