McFarlane Reamer Valve Guide Cleaner Continental - VGR-CN6

Valve Guide Cleaning Reamers for Continental and Lycoming Engines Discounted pricing for a complete setP/N VGR-LC-KT for Lycoming enginesP/N VGR-CN-KT for Continental enginesSpiral flutes for a better guide finishPilot sized specifically for cleaningCleans guides without notching guide surfacesConstructed of precision ground, high speed tool steelPatent # US 9,878,354 B1Product Demonstration Video Why McFarlane Special Reamers?McFarlane offers special reamers in the necessary sizes to clean your Continental and Lycoming engine exhaust valves. Standard reamers manufactured for aircraft valve guides are designed to perfect the guide hole size when reaming new guides. The standard reamer pilot is sized to fit the small bore of a new unfinished guide to insure stability and a straight finished bore. When this same type of reamer is used to clean the valve guides, the pilot is smaller than the finished hole. This causes the reamer to wander and misalign while it is being started and turned in the guide hole.The patented McFarlane cleaning reamers have a pilot the same size as the valve stem. This properly sized pilot forces the reamer cutter to start straight and follow the correct valve stem path through the guide hole. Finally, a tool that is designed for the job!While using standard reamers to clean valve guides, you probably have noticed that you have some valve guide metal in the reamer flutes afterwards. This metal is cut from the sides of the guide when hard carbon deposits displace the unguided reamer from the original guide hole, or the reamer was not started in alignment with the guide hole. Wavy or gouged guide holes cause premature carbon buildup, poor heat transfer, and early guide hole wear. Prevent damage to your valve guides by using McFarlane Cleaning Reamers!Note: Reference Lycoming Service Instruction 1425A, SSP-1776 and SSP-578 and the appropriate overhaul manual or the appropriate Continental service information to determine which specific valve guide sizes you have and the required reamer size before purchasing the necessary cleaning reamer. Lycoming Mandatory Service Bulletin No. 388C requires exhaust valve guide cleaning every 300 hours for helicopter engines and every 400 hours for all other engines. McFarlane valve guide reamers are for cleaning carbon build-up only and must not be used for finish reaming of new valve guides. Part Number Finished Ream Diameter (Corresponds to valve guide ID) Pilot Diameter (Corresponds to valve stem diameter) VGR-LC1 0.4040-0.4050 0.4012-0.4020 VGR-LC2 0.4370-0.4380 0.4320-0.4333 VGR-LC3 0.4985-0.4995 0.4935-0.4945 VGR-LC4 0.4995-0.5005 0.4957-0.4965 Part Number Finished Ream Diameter (Corresponds to valve guide ID) Pilot Diameter (Corresponds to valve stem diameter) VGR-CN1 0.3750-0.3758 0.3715-0.3725 VGR-CN2 0.4350-0.4362 0.4310-0.4320 VGR-CN3 0.4365-0.4375 0.4320-0.4330 VGR-CN4 0.4370-0.4378 0.4325-0.4335 VGR-CN5 0.4375-0.4385 0.4330-0.4340 VGR-CN6 0.3427-0.3435 0.3390-0.3400 Maintenance Tip: Lycoming suggest using ordinary cup grease on the flutes of the reamer to remove deposits with the reamer rather than allowing the deposits to fall into the cylinder.

Manufacturer Part #: VGR-CN6