Catless DPs

IlChengis · 10-29-2010, 04:23 PM

Guys,
I just bought a set of 'gently used' 3" catless downpipes.

I was reading up on ARDesign's website and it appears that their bomb-proof gaskets are reusable. What about their hardware though?

Has anyone had trouble/leaks reusing these gaskets and/or hardware?

Last but not least... is the original OEM hardware at the Turbos reused when installing aftermarket downpipes? No gasket up there?

Thanks for clarifying, I did search but most threads that match my queries were non relevant or incomplete.

-Walter

vasillalov · 10-29-2010, 04:25 PM

There is a gasket on each turbo flange. It is highly recommended that you replace those because they are crush gaskets, meaning, they will assume the shape of the downpipe one the bracket is tightened. If you put new downpipes, then you'll need new gaskets. BMW states that the two turbo ring gaskets must be replaced every time the downpipes are removed.

The rest of the hardware such as bolts and nuts should be reusable. The gaskets should always be replaced, unless otherwise specified.

Kevin@AKMotorwerk · 10-29-2010, 04:30 PM

Quote:

Originally Posted by IlChengis

Guys,
I just bought a set of 'gently used' 3" catless downpipes.

I was reading up on ARDesign's website and it appears that their bomb-proof gaskets are reusable. What about their hardware though?

Has anyone had trouble/leaks reusing these gaskets and/or hardware?

Last but not least... is the original OEM hardware at the Turbos reused when installing aftermarket downpipes? No gasket up there?

Thanks for clarifying, I did search but most threads that match my queries were non relevant or incomplete.

-Walter

as long as no one has ever beat up your turbo flange gaskets, you should be fine reusing them, they "should" be replaced per bmw, but i have never seen a case where they were bad, unless someone really had a hard time installing dp's and beat them all up. you can reuse the clamp and bolt, although most times i clean the bolt threads really good before reusing them

the dp to exhaust gaskets from bmw are useless, only one time use, the ar bombproof ones are reusable and so is the hardware

IlChengis · 10-29-2010, 04:31 PM

Thanks for the clarifications Vasil and Kevin, much appreciated.

-Walter

enrita · 10-29-2010, 05:25 PM

i always have a spare set. you never know. Change them twice this year.....

dbjb · 10-29-2010, 05:45 PM

There's only one set of gaskets you'll need to buy. There are no gaskets up top.
You will, however, need to buy bolts/nuts for the flange connection to the midpipe. The oem bolts are permanently connected to the oem DP.

scalbert · 10-29-2010, 09:37 PM

Walter, you will be fine reusing the stock gaskets and hardware.

Kelvin1000 · 10-30-2010, 09:29 AM

I have the bulletproof AR unused for sale... CHEAP

IlChengis · 10-30-2010, 03:36 PM

Thanks for the clarifications guys. I just wish they all matched.

Quote:

Originally Posted by Kelvin1000

I have the bulletproof AR unused for sale... CHEAP

Thanks bro, but I was looking for the bombproof ones.

-Walter

Mike@N54Tuning.com · 10-30-2010, 04:36 PM

I always replace gaskets.. Its cheap and the safe bet.

Mike

IlChengis · 11-01-2010, 10:16 PM

Thanks guys, I wound up buying Kelvin's brand new gaskets and hardware.

Regards,

-Walter

mineo77 · 11-02-2010, 10:23 AM

gaskets are not so bombproof so I would replace as well

lyndon_h · 11-02-2010, 11:34 AM

Quote:

Originally Posted by Mike@N54Tuning.com

I always replace gaskets.. Its cheap and the safe bet.

Mike

+1. No need in taking a risk when the effort and price to change them out is so low.

M3 Eater · 03-19-2011, 11:16 PM

turbo ring gaskets.... I hear a whistling in the engine bay, sounds like a boost leak. Could it be that these gaskets have finally given up? Also I am having trouble reaching boost target in low gears but reach it fine in 5th and 6th. Anyone familiar with these symptoms?

I just upgraded my fmic, I have been over every connection several times, and I just am 2-3 psi shy of target in 3rd and 4th gear accd to jb4. Also wastegate activity is higher than I would like to see it at WOT as well. I am getting very discouraged with this car. I upgraded the fmic so I could reach target easier, and now it seems like I have messed it up???

mycoupe · 03-19-2011, 11:48 PM

Quote:

Originally Posted by M3 Eater

turbo ring gaskets.... I hear a whistling in the engine bay, sounds like a boost leak. Could it be that these gaskets have finally given up? Also I am having trouble reaching boost target in low gears but reach it fine in 5th and 6th. Anyone familiar with these symptoms?

I just upgraded my fmic, I have been over every connection several times, and I just am 2-3 psi shy of target in 3rd and 4th gear accd to jb4. Also wastegate activity is higher than I would like to see it at WOT as well. I am getting very discouraged with this car. I upgraded the fmic so I could reach target easier, and now it seems like I have messed it up???

wren57 · 03-20-2011, 12:10 AM

Gaskets between the turbos and DPs? I didn't notice any when doing the swap 3 nights ago. Neither did my buddy who was helping me. We just reused the stock vbands too. I assume that's ok?

We also reused the stock gaskets between the DPs and midpipes. I'm going to go back and replace these as I can tell they're leaking... make a crappy noise, especially on cold start.

10-29-2010, 04:23 PM	#1
IlChengis once Treppiede 65 Rep 915 Posts Drives: 2012 E92 M3 Join Date: Aug 2008 Location: Miami and Atlanta iTrader: (4)	Catless DPs - hardware and gaskets... reusable? Guys, I just bought a set of 'gently used' 3" catless downpipes. I was reading up on ARDesign's website and it appears that their bomb-proof gaskets are reusable. What about their hardware though? Has anyone had trouble/leaks reusing these gaskets and/or hardware? Last but not least... is the original OEM hardware at the Turbos reused when installing aftermarket downpipes? No gasket up there? Thanks for clarifying, I did search but most threads that match my queries were non relevant or incomplete. -Walter __________________ 2013 E92 M3 \| 6MT \| AlpWhite \| SilverNovillo \| CarbonTrim \| ZCP \| PremiumPkg \| Alarm 2009 E92 335i \| 6MT \| AlpWhite \| CoralRed \| AlumTrim \| M-Sport \| Nav \| Logic7 \| Alarm (sold to a friend - still in the family)
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10-29-2010, 04:25 PM	#2
vasillalov Mad Linux Guru On The Loose 1197 Rep 5,455 Posts Drives: 2008 335i Sedan, 2023 M3 Join Date: Aug 2009 Location: Chicago, IL iTrader: (5) Garage List 2023 BMW M3 [0.00] 2008 335i E90 [8.00]	There is a gasket on each turbo flange. It is highly recommended that you replace those because they are crush gaskets, meaning, they will assume the shape of the downpipe one the bracket is tightened. If you put new downpipes, then you'll need new gaskets. BMW states that the two turbo ring gaskets must be replaced every time the downpipes are removed. The rest of the hardware such as bolts and nuts should be reusable. The gaskets should always be replaced, unless otherwise specified. __________________
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10-29-2010, 04:31 PM	#4
IlChengis once Treppiede 65 Rep 915 Posts Drives: 2012 E92 M3 Join Date: Aug 2008 Location: Miami and Atlanta iTrader: (4)	Thanks for the clarifications Vasil and Kevin, much appreciated. -Walter __________________ 2013 E92 M3 \| 6MT \| AlpWhite \| SilverNovillo \| CarbonTrim \| ZCP \| PremiumPkg \| Alarm 2009 E92 335i \| 6MT \| AlpWhite \| CoralRed \| AlumTrim \| M-Sport \| Nav \| Logic7 \| Alarm (sold to a friend - still in the family)
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10-29-2010, 05:25 PM	#5
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	i always have a spare set. you never know. Change them twice this year..... __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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10-29-2010, 05:45 PM	#6
dbjb I sweat pheromones 209 Rep 2,103 Posts Drives: e92 335i, retired SLK55 Join Date: Jul 2009 Location: NorCal iTrader: (25)	There's only one set of gaskets you'll need to buy. There are no gaskets up top. You will, however, need to buy bolts/nuts for the flange connection to the midpipe. The oem bolts are permanently connected to the oem DP.
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10-29-2010, 09:37 PM	#7
scalbert Major General 158 Rep 5,776 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	Walter, you will be fine reusing the stock gaskets and hardware.
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10-30-2010, 09:29 AM	#8
Kelvin1000 Major 254 Rep 1,297 Posts Drives: 2019 BMW M2 Competition MT Hoc Join Date: Sep 2007 Location: Miami, FL iTrader: (4)	I have the bulletproof AR unused for sale... CHEAP
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10-30-2010, 04:36 PM	#10
Mike@N54Tuning.com Joint Chiefs of Staff 5044 Rep 116,174 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	I always replace gaskets.. Its cheap and the safe bet. Mike
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11-01-2010, 10:16 PM	#11
IlChengis once Treppiede 65 Rep 915 Posts Drives: 2012 E92 M3 Join Date: Aug 2008 Location: Miami and Atlanta iTrader: (4)	Thanks guys, I wound up buying Kelvin's brand new gaskets and hardware. Regards, -Walter __________________ 2013 E92 M3 \| 6MT \| AlpWhite \| SilverNovillo \| CarbonTrim \| ZCP \| PremiumPkg \| Alarm 2009 E92 335i \| 6MT \| AlpWhite \| CoralRed \| AlumTrim \| M-Sport \| Nav \| Logic7 \| Alarm (sold to a friend - still in the family)
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11-02-2010, 10:23 AM	#12
mineo77 Lieutenant Colonel 130 Rep 1,924 Posts Drives: 2010 135i,1989 PRO3,2001 530i Join Date: Aug 2009 Location: Portland,OR iTrader: (2) Garage List 2010 135i coupe [7.56]	gaskets are not so bombproof so I would replace as well __________________ 135i coupe  6MT  TiAg  ///M sport http://www.rhominnovations.com www.musicarNW.com www.unitedBMWonline.com
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03-19-2011, 11:16 PM	#14
M3 Eater Major 36 Rep 1,054 Posts Drives: 335i Sedan Join Date: May 2010 Location: Unknown iTrader: (3) Garage List 2007 335i [0.00]	turbo ring gaskets.... I hear a whistling in the engine bay, sounds like a boost leak. Could it be that these gaskets have finally given up? Also I am having trouble reaching boost target in low gears but reach it fine in 5th and 6th. Anyone familiar with these symptoms? I just upgraded my fmic, I have been over every connection several times, and I just am 2-3 psi shy of target in 3rd and 4th gear accd to jb4. Also wastegate activity is higher than I would like to see it at WOT as well. I am getting very discouraged with this car. I upgraded the fmic so I could reach target easier, and now it seems like I have messed it up??? __________________ JB4 beta 15 ohms FSB,AEM inline filter/ CM 10, ETS fmic, ER custom made charge pipe,TSW Donnington 18's,Simitumo HTRZ3, Injen DCI, AR DPs, Forge DVs, AA SLD, Koni FSD, ZSP springs.
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03-20-2011, 12:10 AM	#16
wren57 Roll Tide 606 Rep 2,363 Posts Drives: 335i Join Date: Jul 2010 Location: St Louis iTrader: (10)	Gaskets between the turbos and DPs? I didn't notice any when doing the swap 3 nights ago. Neither did my buddy who was helping me. We just reused the stock vbands too. I assume that's ok? We also reused the stock gaskets between the DPs and midpipes. I'm going to go back and replace these as I can tell they're leaking... make a crappy noise, especially on cold start. __________________ Fix your broken/stripped cowl bolts with this elegant brass solution! http://www.e90post.com/forums/showthread.php?p=20230306
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