Tech Tips

Tech Tips

Engine Break-In

Engine Break-In Tips

Engine break-in is a very important phase in the life of your engine. Successful break-in will help to provide you with an engine which uses minimal oil and achieves optimal performance. While it may seem counter-intuitive, engine break-in is actual...

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Does Your R985 Blow Oil Out The Breather?

A Case Study: The Aero Recip 24-7 AOG Service

Aircraft:  DHC-2 Beaver with Pratt & Whitney R-985 engine

The Defect:

Excessive oil leak from the engine’s magneto drives, and has abnormal pressure in the oil tank


On a busy June weekend, the operator’s PRM is unable...

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Should I or Shouldn’t I?

Running and engine “lean of peak” is a hot topic among owners and pilots of piston engine aircraft operating in the industry today. Rising fuel costs make it look like an attractive option for reducing operating costs, and in some cases extending ...

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baffles Does your engine have low oil pressure and/or high oil temperature? Low oil pressure and high oil temperature quite often go “hand in hand”. Before removing the engine check the oil screen or oil filter for metal. Check the oil pressure with a calibrated oil pressure gaug...

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Engine Preservation

TIME OF COMPLIANCE: Any time an engine is expected to sit idle for extended periods

Approved inhibiting oil
anti-rust oilA “Flyaway” Inhibiting Oil is recommended to be used for aircraft engines expected to sit idle for extended periods. Any MIL-C-6529C Type II “flyaway” oil is approv...

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Importance of Proper Valve Adjustment

Both radial and opposed engines must have the proper running clearance between the valve stem and the rocker arm. Most opposed engines have hydraulic lifters therefore the correct push rod length must be selected to maintain the proper running clearance. At overhaul, the ...

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Handling and Shipping of Engines

From time to time engines arrive at Aero Recip looking like they have been involved in an incident when in fact they were just damaged from improper mounting when shipped by a commercial carrier or brought to our facility by the owner. Engines that are shipped on a pallet...

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Change Oil Regularly

It’s impossible to overstate the importance of regular oil changes. During engine operation, the oil becomes contaminated with nitric and sulfuric acids, water, lead salts, carbon, metal and other contaminants. It is essential to flush these out of the engine on a regular...

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Not all engine oils are created equal, and the choice of engine oil is very dependant upon the specific conditions under which your aircraft is operated. What may be a good choice for one operator may not be the best choice for another, even if they are operating the same...

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