Roush Aviation’s FAA PMA pistons are machined from Aerospace Quality 2618-T61 Aluminum Forgings. Using technology and knowledge gained from experience in motorsports and performance engine development, our pistons are redesigned from the original Packard and Rolls Royce Pistons to create a piston with better operating characteristics over the original piston design. All of our pistons now come standard with anodized piston ring grooves and domes. Additionally, our pistons can be ordered with our optional thermal barrier dome coating and / or optional friction reducing skirt coating. Pistons are available for 5.395”, 5.400”, 5.403” and 5.405” bore sizes.
Bill Armour, Part SalesOffice: 734-779-7365, Fax: 734-779-7997Email: William.Armour@Roush.com>
Roush Aviation’s FAA PMA piston rings are designed to operate as a set to work with our PMA piston. The ring set consists of a moly filled steel compression ring, a moly filled steel oil scraper ring, and a two piece iron oil supply ring. This modern ring package provides optimum compression sealing and oil control, with a reduction in drag from the original ring package.
Bill Armour, Part SalesOffice: 734-779-7365, Fax: 734-779-7997Email: William.Armour@Roush.com
Roush Aviation’s FAA PMA piston pins are manufactured from aerospace quality AMS 6260 steel alloy. These pins are designed as replacements for the stronger Rolls Royce Transport Style Piston Pins. Our PMA pins are available in sizes from Standard to 0.020” oversize.
Roush Aviation’s FAA PMA piston pins are manufactured from aerospace quality Aluminum Bronze alloy. Our PMA bushings are precision machined to higher quality and tolerances than the original parts. Our PMA Bushings are available in sizes from Standard to 0.020” oversizes.
FAA PMA Steel Head Nuts are a direct replacement for the original bronze nuts. These nuts are made from AN fastener grade material and are substantially stronger than the original Packard or Rolls Royce parts. Available for Packard and Rolls Royce Transport styles.
FAA PMA camshafts made from aerospace grade 8620 material and available in three different profiles: V-1650-7, V-1650-9, and Rolls Royce Transport 620 (D26917). Camshafts are selectively hardened on the lobe surfaces only with a thicker cross section on the quill to alleviate the problem of cracking found with original camshafts.
FAA PMA Roller Camshaft Package. This is ultimate upgrade for the Merlin Engine. Reduced maintenance, virtually no wear, no chrome or carbide pads to worry about. Our special roller camshafts are manufactured to the same detailed processes of our standard camshafts. However, they are specially ground to work with our FAA PMA 17-4PH stainless steel roller rocker arms.
FAA PMA replacement valve springs manufactured to the highest quality spring wire and tested to over 10 million cycles without failure. Available in sets to work with V-1650-7, V-1650-9, and Rolls Royce Transport engine spring seats and retainers. Available in sets only, not available individually.
FAA PMA replacement Inlet Valves, manufactured from Inconel X751 with Stellite weld inlay on the seat and tip surfaces. Our valves are manufactured from a stronger high temp alloy material than the original valves. Our FAA PMA Valves are compatible with original valve seats and guides or our FAA Approved valve seats and guides.
FAA PMA replacement Inlet Valves, manufactured from Inconel X751 with Stellite weld inlay on the seat surfaces and a tool steel tip. Our valves are manufactured from a stronger high temp alloy material than the original valves and are sodium filed like the original valves. Our FAA PMA Valves are compatible with original valve seats and guides or our FAA Approved valve seats and guides.
FAA PMA replacement Spark Plug Insert manufactured to the original drawings and specifications.
FAA PMA replacement Ignition Harness and Spark Plugs. Stop using old, unknown condition, expensive spark plugs. Switch to our ignition harness and spark plugs and save money and maintenance time. Our Harness has been thoroughly tested in all conditions, up to 37,000 ft altitude, rain, IMC conditions, without failure, issue, or increase in RFI noise.
FAA PMA replacement Ignition Harness and Spark Plugs. Stop using old, unknown condition, expensive spark plugs. Switch to our ignition harness and spark plugs and save money and maintenance time. Our Harness has been thoroughly tested in all conditions, up to 37,000 ft altitude, rain, IMC conditions, without failure, issue, or increase in RFI noise
FAA PMA replacement 3/8” exhaust stud hardware manufactured from stainless steel to decrease degradation due to corrosion. FAA PMA’d for V-1650-9 and Rolls Royce Transport, and available as an upgrade to V-1650-7 cylinder heads through our FAA Repair Station.
FAA PMA replacement Coolant Header Tank Pressure Cap. Our Cap contains a schrader valve in the cap to pre-pressurize the coolant system before flight or use it to pressurize a cold system to perform a maintenance leak check. Pre-pressurization of coolant system with shop air to 14-15 psi prior to operation will increase the boiling point of the coolant by 45°F (25°C). This will reduce the risk of having localized boiling in the cylinder head which leads to cylinder head cracking. Our Header Tank Pressure Cap is also available with an o-ring type seal, by sending your header tank to our FAA Repair Station for alteration. Additionally both caps are available with oversize threads to repair header tanks with damaged threads.
FAA PMA replacement Coolant Tank Pressure Relief Valve. Our FAA PMA Relief Valve is designed to accurately control coolant system pressure at 34-36 psi. This Valve does not open early and bleed off pressure before its set opening point like the original valve.
FAA PMA replacement Propeller Shaft Seal. Our FAA PMA replacement propeller shaft seal is made by the original manufacturer using newer technologies in shaft seal design.
FAA PMA Supercharger Sealing Rings. Our FAA PMA Supercharger Impeller Shaft Sealing Rings are manufactured to the original drawings, materials, and specifications. Both front and rear rings available.
FAA PMA replacement Wheelcase Attaching Studs. Our FAA PMA Wheelcase Studs are made to the original drawing and specifications using stronger material. This joint of the Merlin engine sees high loads due to the transmission of power to the supercharger. Manufactured and FAA PMA’d to replace worn and fatigued original studs.
Roush Aviation Rocker Arm Lash Adjusting Tool with built in Torque wrench. Built-in torque wrench allows proper lash adjustment and torque tightening of tappet.
Socket specially made for removing timing plug from lower crankcase.
Tool to rotate the crankshaft, when the propeller is off the engine.