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The German Auto Solutions DISA valve repair kit is one of thee best upgrades you can do on your M54 engine, IMHO.
The valve was making a 'ticking' noise at idle on my E39 530iT and upon removal was found to be badly worn, with the pivot pin partially migrated.
The GAS kit has well-engineered, high quality parts, clear instructions and is also reasonably priced.
You can do the mod in 30 minutes and you won't lose any more sleep, knowing that the flapper valve pin won't end up inside your engine.
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Current:
2004 X5 4.8is - Le Mans blue/Cream beige
1994 E31 850CSi - Sterlingsilber
Previous:
1987 BMW E28 M5 - Delphin-metallic
1976 BMW E3 3.0Si - Arctic-metallic
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