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Old 06-25-2015, 12:12 PM   #1
96ss1664
 
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Exhaust Leak

I put a set of KOOKS on and re-used the factory clamps to the factory cat back. I tightened the mid-pipes once since installing them, but still sounds like a small leak coming from the factory clamps. Has anyone had problems with the factory clamps leaking?
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Old 06-25-2015, 12:18 PM   #2
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Mine leak a bit until the system warms up and expands. Once heated the leak seals
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Old 06-25-2015, 01:20 PM   #3
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Mine leaks (ticks) when its warm and I never hear it at idle, only when I'm cruising with the windows down and im in second or third above 2300 rpm. I re-torqued the headers and I installed new GM gaskets when I put the headers on and the tick sounds like its coming from around where the mid-pipes are so that's why I assume its at the factory clamp.
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Old 06-25-2015, 01:29 PM   #4
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Hmm have you retightened the clamps after a few heat cycles?
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Old 06-25-2015, 05:26 PM   #5
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Quote:
Originally Posted by Mechzl1 View Post
Hmm have you retightened the clamps after a few heat cycles?
Yep, I'm going to look at it tonight maybe I can fix it. Its driving me
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Old 06-25-2015, 06:35 PM   #6
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Is this common when installing headers?
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Old 06-25-2015, 07:19 PM   #7
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Thank you for this thread! I just installed headers a couple of weeks ago. Today I was out driving and the ticking was really noticeable at idle when warmed up. It has to be an exhaust leak. I re-used the factory clamps behind the Cats as well. Are there aftermarket clamps out there that are as good or better?

I'm going to get under there tomorrow and re-torque everything.
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Old 06-25-2015, 08:14 PM   #8
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My engine has a "tick" at idle that is not related to the headers. You can hear it from the wheel wells and under the car decently. With the hood pope you can't hear it. Thought it was a lifter but honestly doesn't sound metal on metal nor is it that loud but it increases with rpm. it drives me up a wall. Honestly hate it, it's prominent on the driver side front wheel well towards the back of my motor. I talked to a few other people and said theirs make the same noise.... car has 4500 miles on it
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Old 06-25-2015, 08:45 PM   #9
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Injectors?
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Old 06-25-2015, 09:27 PM   #10
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I can hear the injector clicks when I pop the hood something different.
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Old 06-26-2015, 07:42 AM   #11
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Quote:
Originally Posted by ZL1Dan View Post
Thank you for this thread! I just installed headers a couple of weeks ago. Today I was out driving and the ticking was really noticeable at idle when warmed up. It has to be an exhaust leak. I re-used the factory clamps behind the Cats as well. Are there aftermarket clamps out there that are as good or better?

I'm going to get under there tomorrow and re-torque everything.
Do you hear it when your driving or only at idle? Mine is only noticeable when cruising above 2000 rpm or so. If you haven't re-torqued since you put them on that could be your leak. Also remember to re-torque your header bolts if you haven't already.


I think I found mine last night, the driver side clamp was crooked a little and I had to pull my cat-back over when I tightened the clamp. It sits better now, but taking it to Street Machine Nationals this weekend hope its fixed!
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ZL1 Current Mods: KOOKS 2" w/orp, BTR Stage 3 Cam, LPE 2.55, LPE 9.1, ATI Damper, LPE Isolator Coupling, LPE CAI, Ported Snout, ID-850, 160 T, Elite Eng CC Gen2, Shortuning...
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Old 06-26-2015, 07:53 AM   #12
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I'll be re-torquing everything today and I'll report back. I'm sure that's what it is.

Yes, I can only hear it ticking at idle. The exhaust is too loud to hear it while I'm driving.
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http://s203.photobucket.com/user/CGF...%20Red%20Baron
Mods: Recaro seats, Hurst short throw shifter, Roto-Fab CAI, PFADT Tri-Y Headers, High Flow Cats, ATI Balancer, 10% lower pulley, JRE Tune...Some cars are meant for show and some are built for go.
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Old 06-26-2015, 11:31 AM   #13
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I had my headers done recently too and I definitely hear an exhaust leak sound. Its annoying but it gets a bit less noticeable when things warm up.

I had the same problem with my '13 GT500. It ended up completely going away after 3-6 months. I wonder if the soot creates a natural seal over time.

I hope it goes away in my Z. :/
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Old 06-26-2015, 12:06 PM   #14
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Anybody know what the torque specs on the header bolts are?
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Old 06-26-2015, 10:59 PM   #15
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Quote:
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Anybody know what the torque specs on the header bolts are?
GM spec is 18 but have read people range anywhere between 18-22 ft lbs.
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96 SS Camaro #1664, 04 2500 Dirtymax

ZL1 Current Mods: KOOKS 2" w/orp, BTR Stage 3 Cam, LPE 2.55, LPE 9.1, ATI Damper, LPE Isolator Coupling, LPE CAI, Ported Snout, ID-850, 160 T, Elite Eng CC Gen2, Shortuning...
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Old 06-27-2015, 07:10 AM   #16
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Quote:
Originally Posted by Mechzl1 View Post
My engine has a "tick" at idle that is not related to the headers. You can hear it from the wheel wells and under the car decently. With the hood pope you can't hear it. Thought it was a lifter but honestly doesn't sound metal on metal nor is it that loud but it increases with rpm. it drives me up a wall. Honestly hate it, it's prominent on the driver side front wheel well towards the back of my motor. I talked to a few other people and said theirs make the same noise.... car has 4500 miles on it
My car has the exact same noise. Not sure if it is an exhaust leak or something else like the injectors or lifter noise. Once I get it in the air to install my wideband kit I will check it out. It is definitely more pronounced on the driver side.
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Old 06-27-2015, 01:01 PM   #17
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Let me know what you find, everyone else who has the same sound has told me they gave up trying to figure out what it is
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Old 06-27-2015, 02:15 PM   #18
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I've owned three cars with headers (not the Z) and they all had the ticking exhaust leak sound. Changing gaskets and torquing helps for a while but it comes back. Best I had was with copper gaskets but that would be a problem with aluminum heads and block.
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Old 07-01-2015, 09:08 AM   #19
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Any sound clips of this problem?
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