# Lycoming 0 320 E3d Manual

- The O-320 family of engines externally resembles the Lycoming O-235 and O-290 family from which they were derived. The O-320 shares the same 3.875 in (98 mm) stroke as the smaller engines, but produces more power with the bore increased to 5.125 in (130 mm).
- Marvel - schebler ® part no. Carburetor model engine model; continental; 10-2848: 40366: ma-3spa™ c-115 series, c-125 series: 10-3237: 530490.

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**THE HEALTH OF YOUR ENGINE**

The engine compression check or differential pressure test is integral to determining the health of an engine. Most people in the aviation community are familiar with the test but not many really know how or why it’s done. Here is a quick look at how a basic engine compression inspection is carried out and some follow up actions that maybe necessary as a result of the test.

**The engine compression inspection checks the condition of the working parts** in the combustion chamber of a cylinder. This is accomplished by measuring the static leak rate of the cylinder as compared to the leak rate through an orifice of specified size. This is done by attaching a differential compression measuring device, which incorporates the orifice, two pressure gauges, with a regulator to one spark plug hole of the cylinder under test while the piston is at top dead center of the compression stroke.

Lycoming recommends a compression check of the cylinders any time you encounter loss of power, increasing oil consumption, hard-starting, or evidence of unexplained abnormal operation, and to check the health of the engine at 100 hour or annual inspection intervals.

**Before the inspection**, the engine must be run until the cylinder head and oil temperatures are in the normal range. The test should be completed as soon as practical after shut down. A differential compression measuring device is attached to the cylinder via the spark plug hole after the piston is positioned at top dead center of the compression stroke. Shop air is supplied to the tester and the regulator is adjusted to 80 PSI as air is sent is to the cylinder through the tester. To assure that the piston rings are seated, the propeller is moved slightly back and forth with a rocking motion. The cylinder compression reading is taken from the gauge on the downstream side of the orifice and recorded as “X” psi over 80. Pressure readings for all cylinders should be nearly equal. Each engine manufacturer sets the limits for differential pressure and the appropriate service information should be referenced for this criteria.

Lycoming offers the following guidance. A difference of 5 psi between cylinders is satisfactory; a difference of 10 to 15 psi indicates an investigation should be made. Unless the pressure difference exceeds 15 psi the investigation does not necessarily mean removal of the cylinder. A follow-on compression check should be made within the next 10 hours of operation to determine the wear rate. If the pressure reading is below 60 psi or if the wear rate increases rapidly, as indicated by an appreciable decrease in cylinder pressure, removal and overhaul or replacement of the cylinder(s) should be considered.

**YOU CAN SAVE COSTS****Failing to warm up the engine or to do the 10-hour recheck can be expensive.** The cold engine shortcut might save time before the test but it may fail to properly identify a poorly operating cylinder. Conversely, often during the 10-hour operating period, valves reseat themselves and compression improves to acceptable levels, thereby saving the cost of a cylinder.

Questions, please contact:

Cessna Customer Care

316-517-5800 or 1-800-423-7762

[email protected]

### Lycoming O-320-e3d Parts Manual

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### Lycoming O 320 Overhaul Manual

Alpha AviationLycoming O-320-D2A Reference: 10354 |

American Champion7GCBC Citabria Lycoming O-320-B2B 12 Volt System Reference: 9346 |

American Champion7GCAA Citabria Lycoming O-320-B2B 12 Volt System Reference: 9346 |

Apex - RobinLycoming O-320-D1A 12 Volt System Reference: 8609 |

Apex - RobinDR400 160 Regent Lycoming O-320-D2A 12 Volt System Reference: 8421 |

Apex - RobinLycoming O-320-D2A Reference: 9767 |

Apex - RobinDR-300 - 140 Petit Prince Lycoming O-320-E2A 12 Volt System Reference: 8611 |

Apex - RobinDR400 160 Regent Lycoming O-320-D2A 12 Volt System Reference: 9634 |

AvconConversion Lycoming O-320-E2D 12 Volt System Reference: 8797 |

AvconConversion Lycoming O-320-E2D 12 Volt System Reference: 9695 |

AvidMagnum Lycoming O-320-E2D 12 Volt System Reference: 9301 |

BeaglePUP-150 Lycoming O-320-A2B 12 Volt System Reference: 9379 |

BeechM-23 Musketeer Lycoming O-320-D2B 12 Volt System Reference: 8625 |

BeechB23-19 Musketeer III Lycoming O-320-E2C 12 Volt System Reference: 8564 |

BeechB-19 Sport Lycoming O-320-E3D 12 Volt System Reference: 8032 |

Bellanca7GCBC Citabria Lycoming O-320-A2B 12 Volt System Reference: 9379 |

Bellanca7GCBC Citabria Lycoming O-320-A2D 12 Volt System Reference: 8822 |

Cessna170 Doynr Conversion Lycoming O-320-B1A 12 Volt System Reference: 9467 |

CessnaC-172 Skyhawk Lycoming O-320-D2J Reference: 8164 |

CessnaC-152 Conversion Lycoming O-320-E2D 24 Volt System Reference: 8031 |

CessnaC-172 Skyhawk Lycoming O-320-E2D 12 Volt System Reference: 8181 |

CessnaC-172 Lycoming O-320-E2D 12 Volt System Reference: 8888 |

CessnaC-172 Skyhawk Lycoming O-320-E2D 12 Volt System Reference: 9947 |

CessnaC-172-N Skyhawk Lycoming O-320-H2AD 24 Volt System Reference: 7396 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 12 Volt System Reference: 8373 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 24 Volt System Reference: 9677 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 24 Volt System Reference: 9684 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 24 Volt System Reference: 9796 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 12 Volt System Reference: 9864 |

CessnaC-172 Skyhawk Lycoming O-320-D2J Reference: 10153 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 24 Volt System Reference: 10640 |

CessnaC-172 Skyhawk Lycoming O-320-D2J 24 Volt System Reference: 10681 |

CessnaC-172 Lycoming O-320-E2D 12 Volt System Reference: 9820 |

CessnaC-172 Lycoming O-320-E2D 12 Volt System Reference: 10495 |

CessnaC-177 Cardinal Lycoming O-320-E2D N/ Volt System Reference: 10213 |

CessnaC-172 Skyhawk Lycoming O-320-E2D 12 Volt System Reference: 9668 |

CessnaC-172 Skyhawk Lycoming O-320-E2D 12 Volt System Reference: 9794 |

CessnaC-172 Skyhawk Lycoming O-320-E2D 12 Volt System Reference: 9847 |

Cessna172 Lycoming O-320-H2AD Reference: 10282 |

CessnaC-172-N Skyhawk Lycoming O-320-H2AD 12 Volt System Reference: 7403 |

CessnaC-172-N Skyhawk Lycoming O-320-H2AD 12 Volt System Reference: 9837 |

CessnaC-172-N Skyhawk Lycoming O-320-H2AD 24 Volt System Reference: 9852 |

Cub CraftersLycoming O-320-B2B 12 Volt System Reference: 9757 |

Euro-EnaerLycoming O-320-D2A Reference: 9923 |

F. F. A.AS-202 Bravo Lycoming O-320-D2A 12 Volt System Reference: 8551 |

F. F. A.AS-202 Bravo Lycoming O-320-E2A 12 Volt System Reference: 9321 |

FujiFA-200-160 Lycoming O-320-D2A 12 Volt System Reference: 8610 |

GrobG115B - G115C Lycoming O-320-D1A 24 Volt System Reference: 8978 |

GrobG-115 Lycoming O-320-E1A 12 Volt System Reference: 8431 |

GrummanGA-7 Cougar Lycoming O-320-D1D 12 Volt System Reference: 8144 |

GrummanAA5 Traveler Lycoming O-320-E2G 12 Volt System Reference: 8092 |

GrummanGA-7 Cougar Lycoming O-320-D1D 12 Volt System Reference: 9776 |

GrummanAA5 Traveler Lycoming O-320-E2G 12 Volt System Reference: 9738 |

GyroflugSC-01B Speed Canard Lycoming O-320-D1A 12 Volt System Reference: 8508 |

LancairLancair 320 Lycoming O-320-D1F 12 Volt System Reference: 8786 |

MBBBO-209-B Lycoming O-320-E1F 12 Volt System Reference: 8997 |

MBBBO-209-B Lycoming O-320-E2F 12 Volt System Reference: 9619 |

PartenaviaP-66B Oscar Lycoming O-320-E2A 12 Volt System Reference: 8923 |

PartenaviaP-66C Lycoming O-320-H2AD 12 Volt System Reference: 7259 |

Penn Yan AeroSTC Lycoming O-320-D3G 12 Volt System Reference: 9532 |

PiperPA-25 Pawnee Lycoming O-320-A2A 12 Volt System Reference: 8989 |

PiperPA-18-150 Super Cub Lycoming O-320-A2B 12 Volt System Reference: 8553 |

PiperPA-28-150 Cherokee Lycoming O-320-A2B 12 Volt System Reference: 8624 |

PiperPA-28-150 Cherokee Lycoming O-320-A2B 12 Volt System Reference: 10055 |

PiperPA-23 Apache Lycoming O-320-A3A 12 Volt System Reference: 9393 |

PiperPA-23 Apache Lycoming O-320-A3B 12 Volt System Reference: 9384 |

PiperPA-22-160 Tri-Pacer Lycoming O-320-B2A 12 Volt System Reference: 9812 |

PiperPA-22-160 Tri-Pacer Lycoming O-320-B2B 12 Volt System Reference: 8493 |

PiperPA-18 Wings Unlimited Conversion Lycoming O-320-B2B 12 Volt System Reference: 9514 |

PiperPA-18 Wings Unlimited Conversion Lycoming O-320-B2B 12 Volt System Reference: 10428 |

PiperPA-28-160 Tri-Pacer Lycoming O-320-B2B 12 Volt System Reference: 9892 |

PiperPA-23-160 Apache Lycoming O-320-B3B 12 Volt System Reference: 8587 |

PiperPA-23-160 Apache Lycoming O-320-B3B 24 Volt System Reference: 10135 |

PiperPA-28-160 Cherokee Lycoming O-320-D2A 12 Volt System Reference: 8589 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 8150 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 8446 |

PiperPA-28-161 Warrior III Lycoming O-320-D3G 24 Volt System Reference: 8585 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 8885 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 9792 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 9910 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 10316 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 10665 |

PiperPA-28-140 Cherokee Cruiser Lycoming O-320-E2A 12 Volt System Reference: 8590 |

PiperPA-28-140 or PA-28-150 Cherokee Lycoming O-320-E2A 12 Volt System Reference: 8903 |

PiperPA-22 Tri-Pacer Lycoming O-320-E3D 12 Volt System Reference: 9546 |

PiperPA-28-151 or PA-28-140 Warrior Lycoming O-320-E3D 12 Volt System Reference: 8310 |

PiperPA-28-140 Cherokee Lycoming O-320-E3D 12 Volt System Reference: 9665 |

PiperPA-28-150 Cherokee Lycoming O-320-A2B 12 Volt System Reference: 9971 |

PiperPA-18-150 Super Cub Lycoming O-320-A2B 12 Volt System Reference: 9802 |

PiperPA-22-160 Tri-Pacer Lycoming O-320-B2B 12 Volt System Reference: 9645 |

PiperPA-22-160 Tri-Pacer Lycoming O-320-B2B Reference: 9932 |

PiperPA-18 Wings Unlimited Conversion Lycoming O-320-B2B 12 Volt System Reference: 10171 |

PiperPA-23-160 Apache Lycoming O-320-B3B 12 Volt System Reference: 9850 |

PiperPA-23-160 Apache Lycoming O-320-B3B 12 Volt System Reference: 9870 |

PiperPA-28-160 Cherokee Lycoming O-320-D2A 12 Volt System Reference: 9676 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 9649 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 10180 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 10445 |

PiperPA-28-161 Cadet Lycoming O-320-D3G 12 Volt System Reference: 10571 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 9905 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 10078 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G Reference: 10172 |

PiperPA-28-161 Warrior II Lycoming O-320-D3G 12 Volt System Reference: 10447 |

PiperPA-28-161 Warrior III Lycoming O-320-D3G 24 Volt System Reference: 10300 |

PiperPA-28-161 Warrior III Lycoming O-320-D3G 24 Volt System Reference: 10345 |

PiperPA-28-161 Warrior III Lycoming O-320-D3G 24 Volt System Reference: 10701 |

PiperPA-28-140-150 Cherokee Lycoming O-320-E2A 12 Volt System Reference: 9744 |

PiperPA-28-151 Warrior Lycoming O-320-E3D 12 Volt System Reference: 9773 |

Ram Aircraft C-172 Skyhawk STC Lycoming O-320-D2J 24 Volt System Reference: 10380 |

RileyC-172 Ram Conversion - Skyhawk Lycoming O-320-D2G 24 Volt System Reference: 8024 |

Riley Ram Conversion - CessnaLycoming O-320-D2G 12 Volt System Reference: 8372 |

RileyC-172 Ram Conversion - Skyhawk Lycoming O-320-D2G 24 Volt System Reference: 10182 |

Riley Ram Conversion - CessnaLycoming O-320-D2G Reference: 10156 |

RileyC-172 Ram Conversion - Skyhawk Lycoming O-320-D2G 24 Volt System Reference: 10240 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 8864 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 9715 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 8656 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 8940 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 9752 |

RobinsonR-22B Lycoming O-320-B2C 12 Volt System Reference: 9860 |

SlingsbyT67C Lycoming O-320-D2A 24 Volt System Reference: 8438 |

SOCATATB-9 Lycoming O-320-D1A 12 Volt System Reference: 9650 |

SOCATATB-9 Lycoming O-320-D1A 12 Volt System Reference: 9746 |

SOCATATB-9 Tampico Lycoming O-320-D2A 24 Volt System Reference: 8562 |

SOCATATB-9 Tampico Lycoming O-320-D2A 12 Volt System Reference: 8596 |

SOCATATB-9 Tampico Lycoming O-320-D2A 24 Volt System Reference: 8748 |

SOCATAMS-892 Rallye 150 Lycoming O-320-E2A 12 Volt System Reference: 8626 |

SOCATATB-9 Tampico Lycoming O-320-D2A 12 Volt System Reference: 10006 |

Stoddard HamiltonGlasair Super II S Lycoming O-320-D1A 12 Volt System Reference: 8833 |

Stoddard HamiltonGlastar Lycoming O-320-D1F 12 Volt System Reference: 9454 |

SudGY80-160 Gardan Lycoming O-320-B3B 12 Volt System Reference: 10135 |

VansRV Lycoming O-320-D1A 12 Volt System Reference: 8760 |

Varga2150A Kachina Lycoming O-320-A2C 12 Volt System Reference: 8821 |

WassmerWA-52 Lycoming O-320-D1F 12 Volt System Reference: 8556 |

WassmerLycoming O-320-E2C 12 Volt System Reference: 10164 |