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Home >> Porsche >> 2021 >> Panamera Base >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> 20 Fuel Supply, Actuator 2.9L Turbo Gas -- 971 - PANAMERA (971) >> WM, 200101 Checking Fuel System >> Approved Leak-Locating Gases (Test Media)

Approved Leak-Locating Gases (Test Media)

Leak-locating gas (test medium) Designation Composition/purity
Helium He (gaseous, compressed)
  • 4.6 (minimum quality)
  • 5.0, etc.
Not balloon gas! 
  • 99.996 volume % (4.6) He
  • 99.999 volume % (5.0) He
Forming gas
  • Forming gas 5
  • 95% nitrogen N2 and 5% hydrogen H2
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