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Friends,

In my first DIY venture under the hood for this car I have chosen the DISA valve replacement. According to my indy shop's evaluation, I need a new one. I have been reading up on the forum and feel pretty confident. Has anyone done this on an 02 330 ci vert? Anything special I should know?

Your thoughts and prayers are welcome.

Paul in Minnesota
 

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^ No need to remove the throttle body or get that far into the engine, and probably the most important note is being aware of potentially losing the rear metal pin during removal.

If you haven't already, suggest you read through the DISA section in Jfoj's "Cold Weather Misfires and CEL" thread, as it has a lot of relevant information: http://forum.e46fanatics.com/showthread.php?t=897616.

One alternative to buying a new DISA unit is rebuilding your current one with German Auto Solutions' repair kit: http://www.germanautosolutions.com/bmw_solutions/disa_products/m54_m52tu/m54_disa_repair_kit/product_m54_disa_repair_kit.php.

They also sell the stock internals from new Genuine BMW units they rebuild themselves for half the price (here), but would recommend sticking with their upgraded parts and rebuilding the unit yourself.

If you don't want to rebuild the unit, or if the vacuum pot is bad (see here for testing/DIY instructions), a new Genuine BMW DISA unit will run you around $240-$260: http://forum.e46fanatics.com/showpost.php?p=16595140&postcount=29.

The DISA is an easy DIY that's been tackled thousands of times, and here's another one of many DIYs that may be of help: http://www.zhpmafia.com/forums/showthread.php?8607-E46-M54-DISA-Replacement-doityourself.

Best of luck! :thumbsup:
 

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Replacing the DISA is fairly easy. I'd give it a 2/10. The hardest part for me was getting enough clearance to wiggle it out, but even that wasn't too difficult.
 

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If you're going to leave the upper intake boot on, then you might want to remove the F connector. It is directly in the way of the DISA removal, and it's probably the hardest part of the job. 15 minutes max.
 

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Have an extra "F" connector on hand or it will break. I'd suggest changing upper and lower boots if they haven't been done and clean the ICV "while you're in there"!
Use the G.A.S. kit.
 
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