Replacement HFC Fails too! Tell me it aint so...

zforlife · 05-30-2013, 11:05 AM

Update to my original post .

Fair to say the vendor treated me OK. That is, after he accused me of hitting something to cause the o2senor bung to fall off before sending replacement part and return mailer.

NOW I’m faced with another faulty HFC (replacement part) and same issue!!!!!

Incident (first one) ended up costing me $275, which I’m SOL. Had to purchase new o2Sensor and pay $75 for remove/install.

"Exact same" issue happened with the replacement HFC!

I hear exhaust leak. Take a look without jacking car up, and really don’t see anything.

Headed to shop this am to have mechanic tighten exhaust and check gaskets. U know, post install kind of thing.

Before I make it the 3 miles, leak goes into full blown mode...what's happened is o2Sensor bung weld is coming apart (initial leak) before breaking away totally at HFC.
Luckily, I had heard it and pulled into a self serve car wash where I saved 02senor….this time.

Mechanic who is a race car builder, told me on the last visit (replacement) it was his opinion tig weld was faulty. And reason for this was stainless behind weld was black, which indicated it was too hot causing tig to appear solid but was most likely brittle and not strong enough.

He went on to say car vibration would be enough to separate these welded parts

I'm not accusing ERZ/CNT, but want to put info out there for FYI.

The only thing different this time is the fact I have a o2Senor/bung, and you can easily see how part came loose at the weld…

Anyone have any info to add. Wondering about tig weld and/or if part is too heavy for weld? Seems like Berk and some others use a shortened version coming off CFH and might be lighter?

Hate the fact I’m working through HFC gone bad part 2!

Sh0velMan · 05-30-2013, 11:08 AM

Woooow. Again.

SPOHN · 05-30-2013, 11:11 AM

What a shame

DEpointfive0 · 05-30-2013, 11:31 AM

Gotta pay to play, that's what happens when you buy $200 HFCs

Chuck33079 · 05-30-2013, 11:45 AM

Wow. Between the last set and this one, I think it's time to buy a different brand.

zforlife · 05-30-2013, 12:09 PM

Definitely crazy! Wondering how I could be so lucky. Guy at ERZ says they have never had this happen, maybe I'm hitting something. IDK, don't go over speed bumps or anything on my normal route and can't believe that I wouldn't fuk something else up underneath, if I was scraping.
He's sending me one more then I'm SOL and maybe then I will go BERK>

Mandingo · 05-30-2013, 12:35 PM

I'd sell the replacements right when they arrive. Then get Berk or FI HFCs. Don't fck with this trash

Gibby1113 · 05-30-2013, 02:44 PM

For like another $100 couldn't you just have gotten berk hfc? Or test pipes for that price?

fuct · 05-30-2013, 03:25 PM

CNT res TP's broken!

comment #4 sums it up pretty good

synolimit · 05-31-2013, 07:34 PM

Just weld that mother!! Doesn't even have to be pretty, who's looking?

PS not surprised its ERZ. Kids in china need to weld better since that's where it came from.

red2010z · 05-31-2013, 07:52 PM

Buy cheap parts expect to get cheap product.

Get with a brand that has good reviews

I want Z1 or Berks HFC.

Staples · 06-01-2013, 01:21 AM

Well the L-shape non-foulers are heavy. That could be putting a lot of stress on the welds, causing them to crack as they heat up. I have an UpRev tune, so I just had the catalytic CEL turned off and I'm running without non-foulers. I haven't had a single issue on my CNT resonated test pipes and they have 4,000 boosted miles (over a year) on them so far.

I know these are high flow cats, but they're made by the same company.

Zoren 370 · 06-01-2013, 06:56 AM

Just get a full refund and buy the berk or z1 that will save you a ton of headache.

05-30-2013, 11:08 AM	#2 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 21	Woooow. Again. __________________ Buy My Car! \| Build Thread

05-30-2013, 11:11 AM	#3 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	What a shame __________________

05-30-2013, 11:31 AM	#4 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	Gotta pay to play, that's what happens when you buy $200 HFCs fuct, Streetlife, Zoren 370 and 2 others like this. __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

05-30-2013, 11:45 AM	#5 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Wow. Between the last set and this one, I think it's time to buy a different brand. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

05-30-2013, 12:35 PM	#7 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	I'd sell the replacements right when they arrive. Then get Berk or FI HFCs. Don't fck with this trash Streetlife, DEpointfive0 and madwi like this. __________________ some mods

05-30-2013, 12:09 PM	#6 (permalink)
zforlife Base Member Join Date: Nov 2012 Location: Virginia Posts: 8 Drives: 2009 AT- Touring Rep Power: 13	Definitely crazy! Wondering how I could be so lucky. Guy at ERZ says they have never had this happen, maybe I'm hitting something. IDK, don't go over speed bumps or anything on my normal route and can't believe that I wouldn't fuk something else up underneath, if I was scraping. He's sending me one more then I'm SOL and maybe then I will go BERK>

05-30-2013, 02:44 PM	#8 (permalink)
Gibby1113 Enthusiast Member Join Date: Nov 2012 Location: On open empty highways Posts: 366 Drives: 40th anniversary Rep Power: 13	For like another $100 couldn't you just have gotten berk hfc? Or test pipes for that price? __________________ 40th anniversary #450/1000 \| Takeda Attack CAI \| Ark DTS exhaust \| to be continued...

05-30-2013, 03:25 PM	#9 (permalink)
fuct A True Z Fanatic Join Date: May 2009 Location: Sugar Land Posts: 3,692 Drives: 97' Ranger :) Rep Power: 25	CNT res TP's broken! comment #4 sums it up pretty good

05-31-2013, 07:34 PM	#10 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3390	Just weld that mother!! Doesn't even have to be pretty, who's looking? PS not surprised its ERZ. Kids in china need to weld better since that's where it came from. __________________ 13 370z-

05-31-2013, 07:52 PM	#11 (permalink)
red2010z Track Member Join Date: Apr 2013 Location: Texas/North Carolina Age: 40 Posts: 587 Drives: '10 Red B/S/M Rep Power: 14	Buy cheap parts expect to get cheap product. Get with a brand that has good reviews I want Z1 or Berks HFC. __________________ AGENCY K&N SWIFT CSF EVO-R VOSSEN MICHELIN Z1 JVC ZENCLOSURE JLW3 JVC

06-01-2013, 01:21 AM	#12 (permalink)
Staples Track Member Join Date: Sep 2010 Location: Baltimore, MD Posts: 546 Drives: '08 Infiniti G37s Rep Power: 16	Well the L-shape non-foulers are heavy. That could be putting a lot of stress on the welds, causing them to crack as they heat up. I have an UpRev tune, so I just had the catalytic CEL turned off and I'm running without non-foulers. I haven't had a single issue on my CNT resonated test pipes and they have 4,000 boosted miles (over a year) on them so far. I know these are high flow cats, but they're made by the same company. __________________ '08 Infiniti G37s - Forced Induction Fed

06-01-2013, 06:56 AM	#13 (permalink)
Zoren 370 A True Z Fanatic Join Date: Mar 2012 Location: FL Posts: 11,018 Drives: 11 Nissan 370 M6 Rep Power: 1913654	Just get a full refund and buy the berk or z1 that will save you a ton of headache.

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