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Been hearing some noise at front of engine.
Removed serpentine belt to eliminate the possibility of noisy accessories.
Noise is still there. Was thinking it was going to be timing belt / water pump related (bearing, tensioner etc.) Traced noise to driver side, near cam cover (using heater hose "stethescope").
Pulled plastic front cam cover and fired up engine again. Placed hose close to void and was fully expecting to hear noise coming up from behind timing cover. Did not hear much at all. Noise appears to be loudest right near cam gear itself.
Was thinking it might be something to do with cap/rotor on that side but not getting much feed back from there.
Comes through the loudest with the listening device right up over the cam gear.
Has kind of a metallic (bearing on the way out) sound to it but I could be mistaken.
Does it sound like this because I’m having a similar issue.
Similar in that it has that "rattle" type sound to it but not quite the same.
I need to get some video of it like yourself.
Mine is a 400 by the way. Different engine (although I'm sure there are some similarities in certain systems)
If it's coming from the distributor area on your SC4 I'd go ahead and remove the cap/rotor assembly and see what you find. It's possible there's something broken inside and rattling around inside of that bank's distributor. I'd start there, look for anything obvious, and if further teardown is needed I'd consider going ahead with a timing belt and WP job so that you can tear it all down and inspect everything at once.
Yup, that's pretty much where I'm at on it. Took it it a trusted mechanic for another opinion ... there was no definite a-HA! moment for him either. Narrowed it down to the same area, determined it's definitely a rotational noise (vs valvetrain or something of that nature). My question to him was "is it possible for a noisy bearing behind the timing cover to manifest itself in this way - isolating itself to only one cylinder head? He said 100%.. But yeah, next step before anything is get that distributor cap off and see what's what.
Oh dude! Good think you pulled that all apart. Always nice to find the culprit!
It was the last easy thing I could get to before getting real serious.
This was actually making noise!
Now the other side is actually the louder one.
Luckily I had some spares hanging around.
New caps ordered, both sides will be done as soon as I have the parts on hand.
07-23-23, 12:42 PM
Cam gear noise?
