Thread: boost bleed off
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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
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THE best way to hunt for leaks on turbocharged cars, done daily by wrenches at dealership I work for:

Yank the rubber off the turbo intake, insert a metal disc of appropriate diameter (with nipple welded on it) into the tube. Attach shop air supply to 0-2 bar regulator, attach regulator to T-orifice. Connect accurate mechanical boost gauge to one nipple of T-thingie and connect another to the disc.

Start adjusting the pressure on regulator from zero. SLOWLY. Monitor the gauge. Turn it up to 0.8 bar or so. Chances are you will hear hissing sound from couple of places. Take a piece of rubber hose, put one side of it in your ear and hunt around with other side for places where you hear hissing.

You can also spray soap lotion on hoses and joints. It will start bubling where leak is.

Actually, we have this "leak hunting kit" in a shop with nippled disc of different diameter so they can be connected to different cars. It's maybe little finicky to put together but it never fails.
We have
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Thank you for your time,
Old 12-17-2007, 12:13 PM
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