Thread: DISA 0 Ring
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Old 03-31-2011, 07:16 PM
rdl rdl is offline
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Location: Ontario, Canada
Join Date: Jun 2010
Posts: 1,767
Mein Auto: 530i 2003
Originally Posted by doru View Post
How many miles on your car, and was the mechanism that open/closes the valve in good shape?
Car has 126k km / 78k miles.
DISA mechanism seems to be in good condition. The flap rotates smoothly, snaps back briskly & no play in the pivots.
I haven't pulled the small cover to verify the diaphram plunger pulls the valve closed while idling, but I've no reason to think it isn't functioning. The idle is smooth and throttle response off idle & at low speed is good; it wouldn't be if the DISA was open.

I probably provoked the vacuum leak when I removed the DISA to check the pivots were tight while doing the CCV. It was only after replacing it that I became aware of a hiss & went looking for the leak.

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