How do I Replace a BMW DISA Valve O-Ring?
Is your BMW misfiring or idling rough? It’s likely an issue with your DISA Valve (or “Intake Manifold Adjustor”). Whole new DISA Valves for BMWs cost about $300, or more if you go through your dealer! But there’s an excellent chance that the only problem is a failed or failing O-Ring, which lets air leak into the intake. Replacing the O-Ring can be done for about $15 in 15 minutes in your garage!
This works for all BMWs with M52, M54, and M56 engines. Our PTFE Encapsulated, FKM core O-Ring goes far above the OEM specifications and the O-Ring you’d get from the dealer. Do it right the first time, and you’ll never have to change it again! Just go to our PTFE Encapsulated O-Rings page and select “214” in the first dropdown, and click “Add to Cart” and you’re ready to go! You can also go here and copy “2-214-PTFE-CAP-FKM” into the SKU field.
INSTRUCTIONS FOR INSTALLING A NEW O-RING:
You’ll need 1) Torx T40 bit with drive and extension 2) Flathead screwdriver 3) Flat scraper to remove old gasket (pocket knife will work) 4) Spray cleaner and rag.
To replace a DISA Valve, first locate the valve in the engine:
Remove the two (2) Torx screws to pull out the DISA valve unit:
It will look something like this:
(The orange circle is the O-Ring that will be replaced. Ours are black with a clear coating.)
The valve will be dirty. Clean it with a simple spray cleaner and rag.
And then remove the O-Ring (Green in this picture) and replace it with the new Rocket Seals PTFE/FKM O-Ring.
Replace the whole unit using the Torx screws. DO NOT overtighten the DISA Valve.
All you need is a single 2-214-PTFE-CAP-FKM, from here!