Berk HFC Failure?! Need opinions.

km1346 · 09-17-2015, 08:25 PM

Hello everyone.. So recently I've been hearing a faint hissing noise from my HFC/Headers area WHILE I am accelerating. It has become much louder in the last few days..

I know it is common to hear this when the RPMs are coming down.. but you can hear it hiss when the car is in idle and when you rev it/drive on it between 1-2.5k RPMS. I bought my Berk HFCs used a while back from a local Z owner but they were pitch black when I got them (very used

) I have about 8-10k miles on them myself and have never heard this.. Do you guys think the HFCs have failed?
My idle is fine (700-850RPMS)

I already took it to Nissan and the Tech told me that he checked all the bolts and gaskets from my HFC all the way back down to the exhaust and has not found any leaks and believes it may be close to the headers but he cannot find out until he takes it all apart. Below is a link to a video where you can hear me revving up..

Link:
http://vid1286.photobucket.com/album...psezhhdh8c.mp4

If that doesn't work click on this below

Anyone have any idea what this is?
Should I replace back to stock cats and see if this fixes it?

The help is greatly appreciated.

SouthArk370Z · 09-17-2015, 08:30 PM

If it's happening at idle, get a few feet of garden hose, put an end to your ear, and move the free end along the piping until the sound is loudest. That should tell you whether it's a leak or the HFC.

FairladyZ10PG · 09-17-2015, 08:46 PM

Yes, I have berks hfc and it's hiss free at idle

Only when decelerating between 2.5-3k

km1346 · 09-17-2015, 08:55 PM

I distinctively remember one of the HFCs having a slight internal rattle when I bought them from the local guy.. (I shook them when I bought it to check) But I didn't think it was a big deal before I put them on. Might need to get new hfc/tp to find out.

BOLIO 671 · 09-17-2015, 09:14 PM

OP the Vids not working....

km1346 · 09-17-2015, 09:19 PM

Quote:

Originally Posted by BOLIO 671

OP the Vids not working....

Updated with photo link as well. Both are working on my tapatalk and computer. Let me know if you still have issues with it.

tonythetiger · 09-17-2015, 09:33 PM

the hiss is normal, more pronounce with exhaust system.

km1346 · 09-17-2015, 10:04 PM

Quote:

Originally Posted by tonythetiger

the hiss is normal, more pronounce with exhaust system.

So it is supposed to hiss during acceleration and possibly idle?

My friend has the same exhaust and hfc setup I have and his only does it when the RPMs are coming down (like we all know they're supposed to do)

Jsmith7861 · 09-18-2015, 09:18 AM

Mine has always hissed a bit. You can always do what was recommended further up, or put the stockers back on. Mine were also bought used with a couple thousand miles on it.

Dragon_Ball_Z · 09-21-2015, 08:47 PM

Mine hiss during deceleration

-Raj

Iammeowwwwww · 09-25-2022, 01:48 AM

Reviving this thread a bit. I have my berk hfc paired with a non resonated FI exhaust. I do not have a hiss, except for decel at close to idle, normal.

Recently i started getting a metallic rattle clacking noise on acceleration or maintenance throttle at 2.5-2.8 k rpm. I can also be at a stand still and Rev it at that rpm and hear this rattle. It only does it after it has warmed up a bit and it sounds like it's coming from the hfc directly underneath. The sound is embarrassingly obnoxious to the point even the wife is asking what is wrong with my car this time.

I put my oen cat on and the rattle is gone.

Is my hfc failing?
My car sees frequent track days and canyon drives as well, so it sees a lot of hard driving.

I'm getting ready to gut this thing and turn it into a test pipe, any help is appreciated before I do this, thanks!

Spooler · 09-25-2022, 01:02 PM

Yup, your HFC is failing. They rattle when they do that.

Iammeowwwwww · 09-25-2022, 11:15 PM

Quote:

Originally Posted by Spooler

Yup, your HFC is failing. They rattle when they do that.

Thanks for the input. I'll add that it's interesting because I cannot see in visual signs of failure looking at the honey comb, nothing when I bang them together. I did reinstall them but with z1 gaskets I had waiting to be installed, it seemed to help, but not 100%. My other thought is if it's exhaust leak related. Only thing to do is tighten the bolts to Holy **** and put more miles.

Tractionless · 10-02-2022, 06:15 PM

Interesting.

Where does the normal "hiss" derive from? I have FI HFC's and the passenger side began hissing on decel after a couple of thousand miles.

Inflaymes · 10-10-2022, 12:42 AM

Don't VQ's hiss anyway on decel?

09-17-2015, 08:25 PM	#1 (permalink)
km1346 Enthusiast Member Join Date: Aug 2013 Location: Dallas, TX Posts: 370 Drives: 40th Anniversary Rep Power: 12	Berk HFC Failure?! Need opinions. Hello everyone.. So recently I've been hearing a faint hissing noise from my HFC/Headers area WHILE I am accelerating. It has become much louder in the last few days.. I know it is common to hear this when the RPMs are coming down.. but you can hear it hiss when the car is in idle and when you rev it/drive on it between 1-2.5k RPMS. I bought my Berk HFCs used a while back from a local Z owner but they were pitch black when I got them (very used) I have about 8-10k miles on them myself and have never heard this.. Do you guys think the HFCs have failed? My idle is fine (700-850RPMS) I already took it to Nissan and the Tech told me that he checked all the bolts and gaskets from my HFC all the way back down to the exhaust and has not found any leaks and believes it may be close to the headers but he cannot find out until he takes it all apart. Below is a link to a video where you can hear me revving up.. Link: http://vid1286.photobucket.com/album...psezhhdh8c.mp4 If that doesn't work click on this below Anyone have any idea what this is? Should I replace back to stock cats and see if this fixes it? The help is greatly appreciated. __________________ 2010 Nissan 370z 40th Anniversary Build #785 Mods: F.I. CF CBE 12' \| Berk HFC \| Stillen Gen 3 \| Z1 25 Row Oil Cooler \| UpRev Tuned \| CF Lip/ CF Rear Spats/ CF Diffuser/CF Side Blades Last edited by km1346; 09-17-2015 at 09:18 PM.

09-17-2015, 08:30 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	If it's happening at idle, get a few feet of garden hose, put an end to your ear, and move the free end along the piping until the sound is loudest. That should tell you whether it's a leak or the HFC. km1346 likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

09-17-2015, 08:46 PM	#3 (permalink)
FairladyZ10PG A True Z Fanatic Join Date: Aug 2010 Location: SoCal-IE Posts: 1,890 Drives: PGraphite m6 Rep Power: 255	Yes, I have berks hfc and it's hiss free at idle Only when decelerating between 2.5-3k __________________ ///MPPSK///M Performance FRONT SPLITTER///M Performance KIDNEY GRILLS///MPerformance CF MIRRORS///MPerformance CF SPOILER///AC SCHNITZER

09-17-2015, 08:55 PM	#4 (permalink)
km1346 Enthusiast Member Join Date: Aug 2013 Location: Dallas, TX Posts: 370 Drives: 40th Anniversary Rep Power: 12	Berk HFC Failure?! Need opinions. I distinctively remember one of the HFCs having a slight internal rattle when I bought them from the local guy.. (I shook them when I bought it to check) But I didn't think it was a big deal before I put them on. Might need to get new hfc/tp to find out. __________________ 2010 Nissan 370z 40th Anniversary Build #785 Mods: F.I. CF CBE 12' \| Berk HFC \| Stillen Gen 3 \| Z1 25 Row Oil Cooler \| UpRev Tuned \| CF Lip/ CF Rear Spats/ CF Diffuser/CF Side Blades

09-17-2015, 09:14 PM	#5 (permalink)
BOLIO 671 A True Z Fanatic Join Date: Mar 2010 Location: GUAHAN Posts: 1,198 Drives: To & From then Back Rep Power: 3399	OP the Vids not working.... __________________ 2013 Nismo Z34 / FI TT #091 / IG: @lilzilla_z34

09-17-2015, 09:33 PM	#7 (permalink)
tonythetiger A True Z Fanatic Join Date: Oct 2010 Location: SA, TX Posts: 1,035 Drives: 10 Nissan 370z PG MT Rep Power: 193	the hiss is normal, more pronounce with exhaust system. __________________ KWV3/Eibach/StillenG3/FI CBE+LTH+34Row/Uprev/SPL/SouthBendSS/QuaifeLSD/4.08/TommyKaira/Status/VolkZE40/AP Radical BBK/Seibon/Amuse/VIS/Sparco/WorksBellGTC/RJM/Nismo

09-18-2015, 09:18 AM	#9 (permalink)
Jsmith7861 Enthusiast Member Join Date: Nov 2013 Location: Virginia Posts: 466 Drives: 2014 370z Base Sport Rep Power: 12	Mine has always hissed a bit. You can always do what was recommended further up, or put the stockers back on. Mine were also bought used with a couple thousand miles on it.

09-21-2015, 08:47 PM	#10 (permalink)
Dragon_Ball_Z A True Z Fanatic Join Date: Jul 2014 Location: Mississippi Posts: 1,117 Drives: Nismo& Sport/Touring Rep Power: 17	Mine hiss during deceleration -Raj km1346 likes this. __________________ Build in Progress

09-25-2022, 01:48 AM	#11 (permalink)
Iammeowwwwww Base Member Join Date: Feb 2021 Location: california Posts: 32 Drives: 370z MR M6 Rep Power: 195	Reviving this thread a bit. I have my berk hfc paired with a non resonated FI exhaust. I do not have a hiss, except for decel at close to idle, normal. Recently i started getting a metallic rattle clacking noise on acceleration or maintenance throttle at 2.5-2.8 k rpm. I can also be at a stand still and Rev it at that rpm and hear this rattle. It only does it after it has warmed up a bit and it sounds like it's coming from the hfc directly underneath. The sound is embarrassingly obnoxious to the point even the wife is asking what is wrong with my car this time. I put my oen cat on and the rattle is gone. Is my hfc failing? My car sees frequent track days and canyon drives as well, so it sees a lot of hard driving. I'm getting ready to gut this thing and turn it into a test pipe, any help is appreciated before I do this, thanks! Last edited by Iammeowwwwww; 09-25-2022 at 01:51 AM.

09-25-2022, 01:02 PM	#12 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,830 Drives: 2013 Nismo 370z Rep Power: 2684392	Yup, your HFC is failing. They rattle when they do that. Iammeowwwwww likes this.

10-02-2022, 06:15 PM	#14 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,326 Drives: '10 K23 ST 7AT Rep Power: 30525	Interesting. Where does the normal "hiss" derive from? I have FI HFC's and the passenger side began hissing on decel after a couple of thousand miles. Iammeowwwwww likes this. __________________ Toys Not Tots

10-10-2022, 12:42 AM	#15 (permalink)
Inflaymes Base Member Join Date: Mar 2018 Location: Des Moines, Iowa Posts: 165 Drives: 2014 370z Nismo Rep Power: 7051	Don't VQ's hiss anyway on decel? Iammeowwwwww likes this. __________________ 2014 370z Nismo Fairlady \| Gold Powdercoated Nismo Rays \| Z1 Ported Manifold \| RJM Adjustable Clutch Pedal \| Berk Test Pipes \| Beluga Racing Exhaust \| Custom Billetworkz Imperial Sledge Shift Knob \| Carbon Fiber, Flat-Bottom Steering Wheel \| Ecu-Tek Custom Tune

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