Tech Support

Aircraft Troubleshooting

We have put on maintenance seminars at IA Renewals from coast to coast and speak regularly to pilots and mechanics about turbo systems.  Why go through pages of troubleshooting guides when a quick call to an experienced professional technician will put you on the right track immediately.  Turbo systems have been our only business since 1988 so why don’t you put our knowledge to work for you.  We may be able to help you fix your problem right over the phone.  If not, send your turbo system to us for testing.  It is quick, it is easy and the testing is free!

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Toll Free: 1 (888) 847-8008
Local Office: (559) 635-3322

Troubleshooting Questions:

Turbocharger Seal Leakage At Turbine End

POSSIBLE CAUSES AND REMEDIES

  1. Excessive pre-lube or turbocharger–(action) follow pre-lube instruction, vol. 1, section 2 of manual.
  2. Restriction in engine crankcase breather–(action) refer to engine manufacturer maintenance publications.
  3. Restriction or faulty check valve in turbocharger oil drain line–(action) remove restriction or replace damaged parts as needed.
  4. Malfunction in oil scavenge pump or drain sump–(action) refer to engine manufacturer maintenance publications.
  5. Worn or damaged turbine wheel–(action) clean and repair exhaust systems as needed, overhaul turbocharger.
  6. Heavy sludge or coking in center housing–(action) overhaul turbocharger, service engine lube system.
  7. Turbocharger shaft bearings, journals or bearing bores worn–(action) see troubleshooting chart for this condition.
  8. Engine malfunction, piston blow by or high internal crankcase pressure–(action) refer to engine manufacturer maintenance publications.

Seal Leakage At Compressor End

POSSIBLE CAUSES AND REMEDIES

  1. Air cleaner element clogged– (action) service per engine manufacturer maintenance publications.
  2. Restriction or faulty check valve in turbocharger oil drain line–(action) remove restriction or replace damaged parts as needed.
  3. Restriction in duct between air cleaner and turbocharger–(action) remove restriction or replace damaged parts as needed.
  4. Malfunction in oil scavenge pump or drain sump–(action) refer to engine manufacturer maintenance publications.
  5. Restriction in engine crankcase breather–(action) refer to engine manufacturer maintenance publications.
  6. Turbocharger shaft bearings, journals or bearing bores worn–(action) see troubleshooting chart for this condition.
  7. Engine malfunction, piston blow by or high internal crankcase pressure–(action) refer to engine manufacturer maintenance publications.

Manifold Pressure Low Or Fluctuating

POSSIBLE CAUSES AND REMEDIES

  1. Restriction in duct between air cleaner and engine intake manifold– (action) remove restriction or replace damaged parts as needed.
  2. Restriction in engine exhaust system after turbocharger– (action) remove restriction or replace damaged parts as needed.
  3. Restriction in engine intake or exhaust manifold– (action) refer to engine manufacturer maintenance publications.
  4. Pressure relief valve opens at too low a pressure– (action) see troubleshooting chart for this condition.
  5. Engine malfunction, ignition or fuel systems– (action) refer to engine manufacturer maintenance publications.
  6. Turbocharger output low or operates sluggishly– (action) see troubleshooting chart for this condition.
  7. Engine oil pressure low– (action) refer to engine manufacturer’s maintenance publications.
  8. Controller or wastegate dirty and/or sticking– (action) clean or replace as necessary.

Aircraft Cannot Reach Critical Altitude

POSSIBLE CAUSES AND REMEDIES

  1. Restriction in duct between air cleaner and engine intake manifold– (action) remove restriction or replace damaged parts as needed.
  2. Restriction in engine exhaust system after turbocharger– (action) remove restriction or replace damaged parts as needed.
  3. Restriction in engine intake or exhaust manifold– (action) refer to engine manufacturer maintenance publications.
  4. Pressure relief valve opens at too low a pressure– (action) see troubleshooting chart for this condition.
  5. Engine malfunction, ignition or fuel systems– (action) refer to engine manufacturer maintenance publications.
  6. Turbocharger output low or operates sluggishly– (action) see troubleshooting chart for this condition.
  7. Engine oil pressure low– (action) refer to engine manufacturer’s maintenance publications.
  8. Controller or wastegate dirty and/or sticking– (action) clean or replace as necessary.

Turbocharger Output Low Or Operates Sluggishly

POSSIBLE CAUSES AND REMEDIES

  1. Exhaust bypass valve fails to close, or operates sluggishly–(action) see troubleshooting chart for this condition.
  2. Restriction in duct between compressor and engine intake manifold–(action) remove restriction or replace damaged parts as needed.
  3. Restriction in duct between compressor and engine intake manifold–(action) remove restriction or replace damaged parts as needed.
  4. Restriction in engine exhaust system after turbocharger–(action) remove restriction or replace damaged parts as needed.
  5. Restriction in engine intake or exhaust manifold–(action) refer to engine manufacturer maintenance publications.
  6. Heavy carbon buildup behind turbine wheel–(action) overhaul turbocharger as needed.
  7. Heavy sludge or coking in center housing–(action) overhaul turbocharger as needed, service engine lube system.
  8. Turbocharger shaft bearings, journals or bearing bores worn–(action) see troubleshooting chart for this condition.

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