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Old 06-18-2017, 02:22 PM   #1
LovesToEatRice
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Wastegate test, leak

I am changing the springs in my 38mm wastegates to 10 psi. After adding the extra spring in my first wastegate I hooked it up to a bicycle pump with pressure gauge to test the pressure.

When I press down on the pump I can to see the system pressurizing and the wastegate opening. I am also hearing the pressure bleed out from inside the wastegate where the shafts from the spring chamber protrudes into the exhaust piping.

IIs this normal? If it were installed would it not leak out because of the exhaust pressure would be pushing against it?

Never had external gates before. Only ever ran internal gated turbo or NA cars.

I made sure to be really careful putting everything back together. Used a cove to compress the thing and slowly tightened each bolt in a star pattern. The diaphragm was properly seated when I put it back together.

Freaking out over nothing?
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Old 06-18-2017, 02:24 PM   #2
LovesToEatRice
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I did tell same test to the un-opened wastegate before changing the spring and it did the same thing (with less pressure since the spring wasn't changed yet)
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Old 06-21-2017, 03:21 PM   #3
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I guess it's supposed to leak? Lol

Don't use this waste gate if you are metering air before the turbo lol

http://www.facebook.com/video/video....77547652298178
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Old 06-22-2017, 03:46 PM   #4
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It is quite normal, as given the heat etc, there isnt really any practical way to make them totally seal.

Although obviously if the leak is massive it isnt ideal. Shouldnt affect anything to do with the MAF though as the correct place to reference the gate is the compressor housing.

And even if you did take the reference elsewhere, the leak would be small in comparison to the air the engine is consuming
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