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| You are here: >Installation>Connecting Rod--4340 "I" Beam Master Racintg Rod |
INSTALLATION OF AISI 4340 "I" BEAM PRO RACING RODS |
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* Remove all preserve on rods and clean with kerosene. * Remove all cap screws and record every bolt length for stretch reference. Idenfication mark should be placed on cap and rod at each set.. * Blow all male and female thread with clean air and brush away any metal debris and machine residues. Which may cause gouging and seizing on threads. * Take measurement and ensure correct oil clearance for: Rod bearing 0.002-0.003". Pin and Small end; Small end has 0.0009-0.0015" clearance for floating type. Small end is 0.0006-0.0009” smaller than pin for press fit type. Side clearance 0.015-0.025". Make sure to use narrow bearing for a larger journal radius. 9mmØ 8740 Cap screw 40-45 FT-LBS with elongation0.0055-0.0065”
7/16” Ø 8740 Cap screw 65-70 FT-LBS with elongation0.0065-0.0075” * For engine out put power over 1,000 horse power, repalce all cap screws with one grade up with minimum strength over 220,000 PSI. * Ensure the original pair is installed together. Cap and rod are honed together in factory. Mixing pair may change bore shape and damage to journal. * Every rod is precision finished with precise weight sorted in factory. Don't ever alter or file the rod for crank balancing. Which will automatic void the warranty. * Apply plenty oil on all bearings and hand crank engine to ensure rod is clear from piston skirt, camshaft, and engine block.
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