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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-23-2015, 04:42 AM   #1
50sKid
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Join Date: Feb 2015
Location: Los Angeles, CA
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How to Completely Test a DISA Valve

Hey guys,

I've put together a quick video on how to completely test a DISA valve before you decide to put money into a rebuild kit. Check it out if you're interested.



Thanks.

-Jason
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Old Yesterday, 10:49 PM   #2
///BeckeR
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Very cool! Thank you
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03 TiAg 330i ZHP
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Old Today, 07:00 AM   #3
Kire118
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so what exactly does the DISA valve do, and what are the symptoms of a bad DISA when the car is running?
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Old Today, 09:01 AM   #4
markusmarkus
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The DISA varies the length of the intake runners. At low rpms the runners need to be longer than they need to be at higher rpms. The idea is to take advantage of air flow dynamics with the intake and cylinder head.
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Old Today, 08:51 PM   #5
fraserp
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Quote:
Originally Posted by markusmarkus View Post
The DISA varies the length of the intake runners. At low rpms the runners need to be longer than they need to be at higher rpms. The idea is to take advantage of air flow dynamics with the intake and cylinder head.
, excuse me for being a idiot, but I don't understand nothing you wrote. Please could you break it down into idiot form so I can understand.
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