Noise From AMW Catch Can
Thread Starter
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Noise From AMW Catch Can
I have noticed a hollow whistleing noise lately at around 2500 RPM from the engine bay. Its not loud...you have to have the windows up and radio off.
I do have the FAST and LS2 TB which some people say whistles....but this seems new since I installed the AMW can. Is it possible I am hearing noise from air flowing thru the can???
BTW: This can REALLY works. I was surprized to find about 3/16" of oil in the bottom of the can after about 800 miles. Mostly all freeway, no track....just the usuall heavy foot here and there. VERY glad I got it!!!
DH
I do have the FAST and LS2 TB which some people say whistles....but this seems new since I installed the AMW can. Is it possible I am hearing noise from air flowing thru the can???
BTW: This can REALLY works. I was surprized to find about 3/16" of oil in the bottom of the can after about 800 miles. Mostly all freeway, no track....just the usuall heavy foot here and there. VERY glad I got it!!!
DH
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Are you running a Z06 style pcv set-up? Did you disconnect the vent hose that runs from the passenger side valve cover to the throttle body? Try this: with the motor running (and hopefully the whistle whistling), pull out the oil dipstick. If the whistle disappears, there is probably way too much vacuum in the crankcase. HTH
Thread Starter
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by LoneStarFRC
Are you running a Z06 style pcv set-up? Did you disconnect the vent hose that runs from the passenger side valve cover to the throttle body? Try this: with the motor running (and hopefully the whistle whistling), pull out the oil dipstick. If the whistle disappears, there is probably way too much vacuum in the crankcase. HTH
I have a 2004 with the FAST intake and the LS2 throttle body.
My valve vent hose goes to the air bridge...infront of the TB and behind the MAF.
It was run for a couple of thousand miles with the passenger valve cover tube capped off. I hope this didn't cause any problems which are now showing up.
A little ways back I also had my FLP/TC put in. And then my differential rebuilt. I wonder if I am hearing an exhaust leak...what does that sound like??
The sound is not really evident at idle. But I will pop the hood and try the dip stick as you suggest.
DH
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Dirty Howie
LoneStar:
I have a 2004 with the FAST intake and the LS2 throttle body.
My valve vent hose goes to the air bridge...infront of the TB and behind the MAF.
It was run for a couple of thousand miles with the passenger valve cover tube capped off. I hope this didn't cause any problems which are now showing up.
A little ways back I also had my FLP/TC put in. And then my differential rebuilt. I wonder if I am hearing an exhaust leak...what does that sound like??
The sound is not really evident at idle. But I will pop the hood and try the dip stick as you suggest.
DH
I have a 2004 with the FAST intake and the LS2 throttle body.
My valve vent hose goes to the air bridge...infront of the TB and behind the MAF.
It was run for a couple of thousand miles with the passenger valve cover tube capped off. I hope this didn't cause any problems which are now showing up.
A little ways back I also had my FLP/TC put in. And then my differential rebuilt. I wonder if I am hearing an exhaust leak...what does that sound like??
The sound is not really evident at idle. But I will pop the hood and try the dip stick as you suggest.
DH
Exhaust leaks, especially near the engine will not usually sound like a whistle. They usually will have a raspy sound or clicking sound (if they're minor). HTH
Thread Starter
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by molson
Had same noise from mine...Drain valve wasn't fully closed.
Check the easy stuff first.........
Check the easy stuff first.........
I found the noise this morning. It was sucking air from the drain valve. But I tightened it up and it didn't help. I bought it new but second hand from a forum member.....so maybe something is wrong with it.
Anyways I couldn't handle the loud sucking noise anymore and I siliconed it up.
I will call AMW and see if they can send my a replacement. Otherwize its no big deal to dismount it and open it up to drain.
DH
Melting Slicks
Joined: Jul 2004
Posts: 2,846
Likes: 5
From: Sandy Ego CA
Hey Howie, I was up at Andy's last Friday getting tuned and my catch can was also leaking or whistling, the petcock was also open, (don't know how that happend) I also pulled the two fittings on the can and put some teflon seal on them and tighten them both down and got another full tune out of each fitting, that seemed to cure the whistle.
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