Wednesday, May 15, 2019

Engine

EGT sensors (and more Fuel System leaking ? )  ( 3 hrs )

Back to trying to find leak in Fuel System !  At first, thought yesterdays leak discovered and repaired completely solved Fuel System "leak"...but after 1 hr, the 30 psi air pressure slowly dropped.  So today repeated - and now won't hold pressure for more than couple minutes.  Redoubled efforts with lots more soapy suds...thoroughly covering every possible joint or leak path -- No joy.  To confirm not test equipment, I positioned Fuel Valve to OFF...and it held pressure.  So considering if internal leak in valve from LH to RH side. But tested for air transfer to RH side (tube added to fuselage fitting, ending under water...no bubbles!) -- again No joy.   So tomorrow I'll try to isolate (remove hose to engine fuel pump, cap and test that section)...with more soap bubbles.   Meanwhile installed all 4 EGT sensors Type K thermocouple (from Garmin G3X sensor kit, Alcor Tempest #86255, which is Garmin #494-70001-00).  Reamed holes (pleased already drilled in exhaust tubes) w/ #30 reamer since press fit.  Need to finish wiring connectors, add safety wire.
re-checking for leaks in fuel system...
getting frustrated....total immersion seeking possible leak
in "red cube" fuel transducer itself, as well as connections


EGT sensor installed, still need to connect wiring.
Sensor is press fit into #30 hole...so tight and leak free

Left side  (not yet connected to brown thermocouple wires

Right side
Added pic of sensor for reference.