A couple of signs that the DISA adjuster valve for the intake manifold on your BMW is going bad are that the car will start to idle poorly and you'll start to hear rattling sounds coming from the intake manifold located on top of the engine. The valve regulates the amount of air entering into your intake manifold. The car will start running poorly when the mixture between fuel and air becomes unbalanced. The DISA adjuster valve is not really difficult to replace, and an amateur mechanic should be able to replace it without much problem. Here is how you can replace the DISA adjuster valve on your BMW.
You Will Need:
Remove Air Filter Box
There are two 10 mm bolts on the right-hand side of the air filter box. Remove the screws with your ratchet and socket. On the back end of the air filter box toward the windshield are two clips. Pry the clips open with a flathead screwdriver. You can now pull the air filter box out of the engine compartment.
Remove Air Mass Sensor
The air mass sensor is located at the back end of the air box filter. Use your flathead screwdriver to loosen the hose clamp on the sensor so you can remove it from the air intake hose. Set the sensor down in the engine compartment.
Remove DISA Adjuster Valve
The DISA adjuster valve is located on the right side of the engine block and is bolted to the intake manifold cover. You should use the torque wrench to remove the bolt at the top of the DISA adjuster. Getting to the bottom bolt will be a little harder. Place the T40 torque bit on the end of the socket extension so you can reach the bolt underneath the DISA adjuster. A little tip: use electrical tape to hold the torque bit into the socket extension so it won't fall out while you are working. Remove the lower bolt.
The DISA adjuster will slide straight out backward from the intake manifold cover.
Install New Adjuster Valve
Slide the new adjuster into the place of the old one and bolt it in place. Place the air sensor back onto the air flow hose and tighten the hose clamp down to firmly affix the sensor in place. Place the air filter box back in place and clip the back of the filter box back down. Replace the bolts on the side of the air filter box to complete the job.
For more instruction or professional assistance, talk to an auto repair shop like Jim Stephen's Foreign Car Repair.
Share7 October 2016
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