Do-It-Yourself information for the modifications I've completed
Do-It-Yourself information for essential wear and tear items
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Tube Elbow Replacement
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Diagnosis
The symptoms of a hole in the tube elbow are a whistling intake noise during normal driving. You can probably only hear it when your windows are down and you're accelerating. It may or may not throw a check engine light. The easiest way to check and see if you have a torn tube elbow is to follow the intake hose down and use your fingers to search for holes. Mine had a hole about the size of a finger on the smaller hose that connects to the idle control valve.
Difficulty
This job is fairly simple but because of the small spaces it is tedious. It should take roughly 30-45 minutes from start to finish and if you can use a wrench and a ratchet, you can definitely do this job.
Parts Needed
Tube Elbow (BMW P# 13-54-1-438-759) $12-18
Tools Needed
6mm, 10mm Sockets with extensions
T30 TORX Socket
6mm Wrench
3/8" Ratchet (1/4" Ratchet will help make things easier)
Needle Nose Pliers
Flat-Head Screwdriver
Instructions
Conclusions
After replacing the tube elbow the intake whistle has disappeared and the car appears to run better since it is now able to correctly meter the air coming into the engine. Furthermore, I noticed about an increase in my gas mileage, which makes this fix definitely worth your trouble.
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