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Old Sat, Jun-11-2011, 10:12:27 PM   #1
mpower22
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Default Official Thread - E46 M3 CPV - High Temperature Constant Pressure Valve O-Rings

FALL 2018 - THESE ARE IN STOCK NOW! There are still plenty of these to go around. PM or post in the thread if interested in purchasing. I provide discounts for shops or members purchasing multiple quantities

Viton Fluoroelastomer high-temperature O-Rings to fix the infamous oil leak at the CPV on the S54 motor. If you are under the car and notice an oil leak where the engine and transmission meet that appears to be the rear main seal, its most likely this. As you will see, it is not the actual valve that has failed, but the o-ring seal itself has hardened and failed. In fact, the CPV itself is not a common failure item. I have yet to see one fail, so replacement is not necessary. These are exact fit to factory specs as shown in the pics!

Through my own research combined with trial and error, I was able to come up with a more durable o-ring solution to keep us S54 owners from replacing the valve unnecessarily because of the stock BMW ring that is included with the valve. These o-rings are much higher quality than the standard Buna-N o-rings that BMW uses for most gaskets (including the one on the CPV). The first thing to notice is that mine are not shiny like Buna-N rings. They have twice the temperature threshold (400 degrees), are much more resistant to oil/petroleum products, but do cost up to 10x as much. The o-ring on the CPV WILL LEAK, it is just a matter of when. Even if you are purchasing a new CPV (which is not required nor recommended), you should still replace the o-ring with this more durable one.

$5 shipped each/$8 for two - Reduced rate for purchasing multiple quantities
YES - I will ship International! - $6.50 shipped each/$10 for two. Please inquire within


CPV Service KIT - $22 Shipped! Includes (2) Viton Replacement O-Rings and 1/2" drive CPV Removal Tool!
International orders welcome, PM me for a price!

Paypal Accepted!

I sell these on Amazon for $28 per kit shipped, for forum members I will offer this kit for $22 shipped. The tool is very difficult to find; 11/16 or 3/4 drag link sockets are everywhere, but too large for the job. 3/8 or anything smaller will strip the head of the valve. I will even buy the tool back if you don't wish to keep it after doing this service!

*IMPORTANT* I can't stress this enough - be careful not to over torque the valve; hand-tight is all that is needed. This is not a tapered thread so resistance doesn't increase as the valve is threaded into the block. Once the valve bottoms out, STOP, the install is complete and it will not go any further.

DIY Link can be found here:
http://www.m3forum.net/m3forum/showthread.php?t=358941

--------------->This is definitely a MUST if you are changing out your headers, as you will have full access to this component.

BMW Part# Reference: 11111318185
I do exchange iTrader, but due to the low participation, I do not leave it unless left for me first. I guarantee return-feedback!
Attached Images
File Type: jpg IMG_1093.JPG (411.4 KB, 1797 views)
File Type: jpg oring.jpg (197.0 KB, 1227 views)
File Type: jpg CPV Leak.JPG (112.2 KB, 2531 views)
File Type: jpg CPV NA Headers.jpg (535.8 KB, 1139 views)
File Type: jpg CPV Fix KIT.JPG (294.1 KB, 804 views)
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Last edited by mpower22; Wed, Oct-17-2018 at 03:37:35 AM.
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Old Sat, Jun-11-2011, 10:47:20 PM   #2
duckiecuz
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

i just bought a new CPV -_-
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Old Sat, Jun-11-2011, 11:11:02 PM   #3
Invasion1
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

I will take 2

Can/Will you mail them to Ontario Canada?
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Old Sat, Jun-11-2011, 11:56:25 PM   #4
dafoe
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

I'll take one John, PM me your email addy.
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Old Sun, Jun-12-2011, 12:04:22 AM   #5
Heckafunctional
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

nice..
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Old Sun, Jun-12-2011, 01:13:10 AM   #6
mpower22
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

Quote:
Originally Posted by duckiecuz View Post
i just bought a new CPV -_-
I did the same at first...

Quote:
Originally Posted by Invasion1 View Post
I will take 2

Can/Will you mail them to Ontario Canada?
Yes, checking postage and sending you a PM now.

Quote:
Originally Posted by dafoe View Post
I'll take one John, PM me your email addy.
Sending PM

Quote:
Originally Posted by Heckafunctional View Post
nice..
Thank you!
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15-Year Forum Member

2003 M3Laguna Seca Blue/6MT Black Leather Cloth Interior/Full [CSL] Exhaust
Original Owner, Custom Built - PDC, Moonroof, Bi-xenons (TFX), Brushed Aluminum Trim, Bluetooth ULF
European - Rotors (F&R), Bumper, Mirrors, Warning Triangle, Console, LSZ, First Aid Kit, Fire Extinguisher
OE LED Conversion/Outer Ring Mod | V1 Hardwired/Ashtray Display | 3M 35% Tint | Intravee II, Diamond H600s, JL 10W3v3, HD900/5
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Old Sun, Jun-12-2011, 04:22:34 AM   #7
Petrucci
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

You just need one ring correct?



I'll take one, PM your PayPal address and I'll send some money your way.
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Old Sun, Jun-12-2011, 01:48:29 PM   #8
M Nectar
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

One please! PM me payment details. thanks!
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Old Sun, Jun-12-2011, 02:05:14 PM   #9
M clunk
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

I'll take 2 also! I'm glad I didn't replace the whole unit...
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Old Sun, Jun-12-2011, 04:08:54 PM   #10
Invasion1
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Default Re: CPV - High Temperature Constant Pressure Valve O-Rings

Payment sent!

Thank you John, I appreciate it.
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Discussing CPV - High Temperature Constant Pressure Valve O-Rings in the Parts for Sale/Wanted Forum - Post your Parts Wanted, and non commercial bmw related items for sale. We ask that companies selling goods become a Sponsor to advertise your goods. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)