Odd valvetrain noise.
03-05-2005, 10:06 PM
#22
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Well!
I have a very good feeling I was able to sort out my problems. I went through the preload procedure for my Crane/Vinci rockers again, and the train is SILENT. Silent, as in, I didn't realize it was even making noise in the past when it actually was. I can't hear much of anything through the firewall now. It's dead quiet in the operating areas where I used to be able to pick up on the noise I mentioned in the first thread - now I can't hear a THING. It's definitely one of those circumstances where you don't realize what you're have until it's gone. I definitely know what Crane mean by these rockers were engineered to be extremely quiet.
I've been tearing around all evening, and I didn't hear a hint of the noise I first mentioned. I'll give it a few days to make sure nothing comes back... and I'll definitely tell you if it does... but for now, I'm going to have to chaulk this up to a poor preload procedure that I did.
I have a very good feeling I was able to sort out my problems. I went through the preload procedure for my Crane/Vinci rockers again, and the train is SILENT. Silent, as in, I didn't realize it was even making noise in the past when it actually was. I can't hear much of anything through the firewall now. It's dead quiet in the operating areas where I used to be able to pick up on the noise I mentioned in the first thread - now I can't hear a THING. It's definitely one of those circumstances where you don't realize what you're have until it's gone. I definitely know what Crane mean by these rockers were engineered to be extremely quiet.
I've been tearing around all evening, and I didn't hear a hint of the noise I first mentioned. I'll give it a few days to make sure nothing comes back... and I'll definitely tell you if it does... but for now, I'm going to have to chaulk this up to a poor preload procedure that I did.
03-06-2005, 04:30 PM
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Crap, I still got a hint of the noise showing up.
Overall things are much quieter than before... but after plenty of spanking today, it started to show up again. It seems to be really localised to ~2,000rpm when you back off the throttle. Everywhere else, everything is very quiet (still quieter than before, which I'm very pleased about). I want to double check intake manifold bolts next. I'm not sure what the torque spec is.
Matt: I'm not sure on that right now, but I can get the info. Another member speced out what the two-turns of preload equals to.
Overall things are much quieter than before... but after plenty of spanking today, it started to show up again. It seems to be really localised to ~2,000rpm when you back off the throttle. Everywhere else, everything is very quiet (still quieter than before, which I'm very pleased about). I want to double check intake manifold bolts next. I'm not sure what the torque spec is.
Matt: I'm not sure on that right now, but I can get the info. Another member speced out what the two-turns of preload equals to.
03-07-2005, 07:42 AM
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Sweet, thanks.
No... I never had it off.
I was probing around with a stethescope last night. Those injectors sure are loud. I can't help but wonder if they're the source of the noise? Larger cams need/use more fuel at idle... the injectors work harder... so they're prone to be noisier?
No... I never had it off.
I was probing around with a stethescope last night. Those injectors sure are loud. I can't help but wonder if they're the source of the noise? Larger cams need/use more fuel at idle... the injectors work harder... so they're prone to be noisier?
03-07-2005, 08:45 AM
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Well I got some Yella Terra's on finally and although I believe it to be a little quieter, It wasn't what I was hoping for. I'm also wondering if what I'm hearing isn't the injectors. They are the only real noise that I can hear with my stethoscope as well. I wonder if some FRC's might not reduce the noice a little more. Just a thought.
