Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 0
991 : 2011- 24
997 : 2004- 65
996 : 1997-2005 32
993 : 1993-1998 4
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 31
Cayman : 2005- 21
Cayenne : 2003- 6
Macan : 2014- 6
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
AMS911
Newbie


Joined: 28 Jan 2019
Posts: 42



PostPosted: Mon Nov 18, 2019 7:04 pm    Post subject: 997 Hayward & Schott Bypass ... potential issues? Reply with quote

Hi Guys,

Had my bypass/crossover pipe fitted last Friday. All seems to have gone well and the car definitely sounds better. However I wanted to know if the following is normal:

On idle and roughly around the 1000rpm mark, there is a rattle, sounds abit like a tin can and its constantly there until about 1100. Only at that rpm range. I've also noticed it seems to increase more when the car is hot after a spirited drive. Is this a normal occurrence?

Any help would be appreciated. I haven't raised the potential issue with H&S as of yet, just thought I'd get some opinions on here first.

Thanks

Last edited by AMS911 on Mon Nov 18, 2019 7:44 pm; edited 1 time in total
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7573
Location: Brighton


PostPosted: Mon Nov 18, 2019 7:21 pm    Post subject: Reply with quote

Erm .. silly question but what is an H&S bypass ?
_________________
.

My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
AMS911
Newbie


Joined: 28 Jan 2019
Posts: 42



PostPosted: Mon Nov 18, 2019 7:42 pm    Post subject: Reply with quote

My apologies should have been clearer.

Hayward and Schott. Rear muffler bypass ... crosspipe thumbsup
 
  
View user's profile Send private message
   
Magic919
Barcelona


Joined: 05 Jun 2013
Posts: 1279
Location: Berkshire


PostPosted: Mon Nov 18, 2019 7:53 pm    Post subject: Reply with quote

It’s Hayward and Scott.
_________________
997.2 C4S PDK
 
  
View user's profile Send private message
   
Sy
Spa-Francorchamps


Joined: 24 May 2010
Posts: 262



PostPosted: Mon Nov 18, 2019 8:05 pm    Post subject: Reply with quote

Gundo hack.

Doesn’t sound right to me.
_________________
He who dies with the most toys wins!
 
  
View user's profile Send private message
   
benbuhagiar
Nürburgring


Joined: 28 Dec 2014
Posts: 384
Location: Kent

2008 Porsche 997 Carrera 2

PostPosted: Mon Nov 18, 2019 8:08 pm    Post subject: Reply with quote

I’ve got the H&S bypass fitted and don’t have this issue. Get it checked out.
_________________
997.2 Carrera PDK
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7573
Location: Brighton


PostPosted: Mon Nov 18, 2019 8:17 pm    Post subject: Reply with quote

Aghh okies the Gundo hack .. the bypass between pipes ..

Ok .. you have a cracked exhaust bracket im guessing .. need to pry bar each part to see whats loose.

probably there before hand but you will have more vibration on these parts now and it will buzz / rattle .

Heat effects this a lot .. the hotter the exhaust and the more expansion of the metal .

Image below is one i bent the bracket away to stop a noise and demonstrate what parts can cause noises ..

it all depends on the model / year as to what exhaust but this is an example .
_________________
.

My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 



PA270025.jpg
 Description:
 Filesize:  520.44 KB
 Viewed:  1037 Time(s)

PA270025.jpg


  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15551
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Mon Nov 18, 2019 8:20 pm    Post subject: Reply with quote

Sounds like a bit of metal on metal vibration , I had it when my exhaust was first fitted and when hot the metal expanded and touched another part just at certain points in the rev range. . very easy fix but let Haywoods sort it . Its going to be one of those it shouldn't have happened but sometime these things do happen type of issue. Thumb
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15551
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Mon Nov 18, 2019 8:22 pm    Post subject: Reply with quote

deMort wrote:
Aghh okies the Gundo hack .. the bypass between pipes ..

Ok .. you have a cracked exhaust bracket im guessing .. need to pry bar each part to see whats loose.

probably there before hand but you will have more vibration on these parts now and it will buzz / rattle .

Heat effects this a lot .. the hotter the exhaust and the more expansion of the metal .

Image below is one i bent the bracket away to stop a noise and demonstrate what parts can cause noises ..

it all depends on the model / year as to what exhaust but this is an example .


Ian the Haywood and Scott bypass is for the 997.2 its removal of the extra rear muffler and either cross over or X pipe is fitted without that third muffler the 997.2 has a better exhaust note .
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.

Last edited by Phil 997 on Tue Nov 19, 2019 1:54 pm; edited 1 time in total
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7573
Location: Brighton


PostPosted: Mon Nov 18, 2019 8:28 pm    Post subject: Reply with quote

Aghh okies .. so not the gundo hack as i understand it ..

This is why i just stick to Porsche only items lol .

Same answer though .. check the brackets .. Smile
_________________
.

My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
AMS911
Newbie


Joined: 28 Jan 2019
Posts: 42



PostPosted: Tue Nov 19, 2019 1:24 pm    Post subject: Reply with quote

thanks all,

I have spoken to Ian at Hayward and Scott, will be taking the car back to have it inspected and hopefully get the issue resolved. Its a pain when these things do occur but I suppose thats part and parcel of modifying away from manufacturers spec !

Will let you know if its resolved.
 
  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15551
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Tue Nov 19, 2019 1:56 pm    Post subject: Reply with quote

AMS911 wrote:
thanks all,

I have spoken to Ian at Hayward and Scott, will be taking the car back to have it inspected and hopefully get the issue resolved. Its a pain when these things do occur but I suppose thats part and parcel of modifying away from manufacturers spec !

Will let you know if its resolved.


I certainly is mate, I cannot remember the number of times I have had to retweak a mod that was done. Thumb
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
View user's profile Send private message
   
freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1697
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Tue Nov 19, 2019 3:14 pm    Post subject: Reply with quote

Had no issues whatsoever with 997.1 H&S bypass or my 997GT3 H&S X-Pipe.

Best they have a look Thumb
_________________
2007 Porsche 997.1 GT3 CS
1967 Alfa Romeo "duetto" Spyder
1972 Porsche 911 Targa 2.4E
1997 TVR Chimaera 4L V8
2010 Vespa 125
2019 Tiger "Push-bike"
Instagram for lots more car pics: @London_Classica
 
  
View user's profile Send private message
   
AMS911
Newbie


Joined: 28 Jan 2019
Posts: 42



PostPosted: Wed Nov 20, 2019 11:48 am    Post subject: Reply with quote

Ok guys an update and some more questions ! I need help deciding what my options are and the best route to take...

I popped in to see Ian at Hayward, on first inspection it seems like the offside muffler/silencer (the box which sits on the inside of the bumper) is the problem. At first glance it seems that all of the brackets are fine (although this will need to be double checked when the car is on the ramp). Ian at this point has assumed that it is the muffler box as when giving it a few taps the noise changes under different revs. He's stated that due to the increase in the speed of airflow, most likely the bracket inside the box is loose and will need to be fixed. This entails obviously opening up the muffler box, fixing and re welding.
Assuming this is the issue....

My car was purchased from an OPC in march, having gone through a 111 inspection and given to me with the OPC warranty. I've covered only about 1200 miles since then. Surely if the muffler is damaged/corroded internally they should have replaced this? I can understand that you couldn't really hear the noise with the original PSE centre section, so maybe it went un noticed. Also this leads me to wonder when the other (nearside) muffler will suffer with the same issue.

The main reason I decided to have the bypass fitted 1. the much improved sound thumbsup. But more importantly 2. Having gone through a major service at OPC Tonbridge a couple of weeks ago, one of the advisories from the service was corroded bolts on the exhaust, which although led to no blowing etc may need to be replaced...

So this leads me to the only options I can think of at the moment:

1. I let Hayward and Scott fix the muffler (they have quoted me £350 for this)... this entails losing my warranty I assume as the muffler will have been altered and i'm sure the welding will be visible upon an OPC inspection.

2. I purchase another set of mufflers... What are my options that work with the porches sports exhaust button? Are there any options which are similar to stock as I want to keep functionality of the valves.

3. Return the car to stock and raise the issue with the OPC. Would they cover these parts under warranty or is it general wear and tear ? How would I raise the issue if the noise/issue is unnoticeable with the standard centre section.

any thoughts, other options and opinions are welcome and much appreciated.
 
  
View user's profile Send private message
   
Hertsdriver
Nürburgring


Joined: 12 Nov 2018
Posts: 468
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Wed Nov 20, 2019 12:08 pm    Post subject: Reply with quote

You might as well discount any assistance on the warranty from OPC, they wont do anything on an exhaust system as its a consumable.

This isnt cheap but you could make an offer:
https://www.ebay.co.uk/itm/OEM-Porsche-997-911-997-2-Gen-2-GTS-Sports-Exhaust-Muffler-Box/383078231197?hash=item59313dec9d:g:uwIAAOSwk3NdQDRS

The picture on this one shows the wrong side box for you, but he may have th eother one if you ask:
https://www.ebay.co.uk/itm/porsche-997-pdk-2010-sport-exhaust/123976833755?hash=item1cdd985adb%3Ag%3AarAAAOSwFpNdCR1C&LH_ItemCondition=4
_________________
My 997.1 C2 ownership thread: http://911uk.com/viewtopic.php?t=134228
 
  
View user's profile Send private message
   
MJA911
Sepang


Joined: 10 Dec 2013
Posts: 2846
Location: Berkshire

2012 Porsche 991 Carrera

PostPosted: Wed Nov 20, 2019 12:47 pm    Post subject: Reply with quote

Exhaust systems are probably not covered within the Porsche warranty t&c's, but it may be worth asking as my 997.2 with PSE had internal issues with one of its silencers and they fixed it, telling me that given the age and condition of my car, they had used their discretion and decided that a silencer failure should be fixed. This was around 3 years ago on a 2010 car with about 40k on the clock. You do have the the added issue of the bypass pipes being there, you'd have to re-fit the original centre silencer before discussing with the OPC.
_________________
991.1 C2, 986 Boxster S
Past pleasures: 997.1 GT3, 997.2 C4S Cab, 993 C2, 997.1 C2S, 996.1 C4
 
  
View user's profile Send private message
   
Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15551
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Nov 20, 2019 2:15 pm    Post subject: Reply with quote

personally I think I would just get it fixed for £350 here are the options I see repairs is option 4 not sure if 5 can be done as just a single box.

other options are.

1/new PSE exhaust £2100 - advantage none other than its new

2/new aftermarket valved cat back exhaust from someone like topgear £1000 ( they can set it up to run off the PSE switch and not the remote fob it comes with) -advantage better sounding than PSE and light stainless steel adding BHP

3/buy used PSE parts - advantage price but you may have the same issue in a few months .

4/repair your boxes -advantage price and knowing that part is sorted

5/see if you can buy just a single new use box from Porsche ( although knowing porsche you can only buy a whole exhaust and not just parts) but if you can that may be an answer price dependant . Does anyone else know if you can buy just sections of OE PSE exhausts new or not.
_________________
911 Owners,Some Invest In The Future,
Others Enjoy The Moment Today.
 
  
View user's profile Send private message
   
Magic919
Barcelona


Joined: 05 Jun 2013
Posts: 1279
Location: Berkshire


PostPosted: Wed Nov 20, 2019 5:14 pm    Post subject: Reply with quote

I would let them fix it. You don’t lose your warranty, they just won’t let you renew it if they spot the changes.
_________________
997.2 C4S PDK
 
  
View user's profile Send private message
   
James M-S
Suzuka


Joined: 11 Apr 2017
Posts: 1110
Location: Derbyshire

2009 Porsche 997 Carrera 2

PostPosted: Wed Nov 20, 2019 11:12 pm    Post subject: Reply with quote

Have you checked the heat shields around the cats/lamda probe? They are prone to coming loose and can just be cut off. (Not worth struggling to remove lamda , then breaking it, to refit a new shield).

You’ll see if you take a back wheel off.

EDIT - just read your update and see you have located the vibration.
I would test the water with a warranty claim first, call in face to face (in a different car). If you get a good feeling, return to standard and take it back.

If they subsequently reject the claim - you’ll only be an hours labour out of pocket for refitting standard part.
_________________
Manual 997.2 c2 :Basalt + gtechniq : H&S + Gundo
 
  
View user's profile Send private message
   
m1kegibson
Newbie


Joined: 15 Dec 2013
Posts: 10



PostPosted: Wed Nov 20, 2019 11:34 pm    Post subject: Reply with quote

AMS911 - I had issue regarding bolts fixing exhaust components after purchasing my 997.2 from an OPC (8 years ago). All the support bracket bolts were totally corroded which was uncovered at 1st service. I argued bitterly that in the 12 months I had owned the car (I had taken in for service after 1st year albeit it had a full service immediately prior to my purchase) the bolts could not have gone from "good" to corroded to the extent they were falling apart and surely should have been dealt with at service prior to my purchase I got no joy as this is not covered by warranty. I also got stung for new front disks and several other "consumable" parts. It rather tarnished my expectations in relation to the condition/servicing of the car by the OPC. Should I ever buy from an OPC again, I will have it independently inspected.

As for H&S bypass, I had one fitted some time ago and have never experienced any rattles etc.
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum