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12371042
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Roller Lifter Kit
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This roller lifter kit is used on all late model V8 blocks 1986 and newer. These second design lifters are used in late model 350 HO engines and use a higher checkball spring preload. This kit includes 16 of P/N 17120735 roller lifters, 8 of P/N 12550002 valve lifter guides, one of P/N 14101116 valve lifter guide retainers, 4 of P/N 24501365 retainer bolts, and 4 of P/N 120386 retainer washers. This kit plus pushrod kit P/N 12371041 and a roller tappet design camshaft will convert your engine to a roller lifters engine. Use kit items listed above for single service parts.
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12371044
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Hydraulic Lifter Kit
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This hydraulic lifter kit is used on early model V8 blocks 1985 and older. This kit includes 16 of P/N 5232720 hydraulic lifters and is to be used with early model standard length pushrod kit P/N 12495491 or .100" long kit P/N 12371057. Use P/N 5232720 for single service.
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14044875
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Lifter Bore Repair Kit
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Don't discard an expensive engine block because of a damaged lifter bore! Scored or leaky lifter bores can be repaired with this sleeve kit. Lifter bore sleeves are also recommended for competition engine builders who "blueprint" the tappet bores.
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Technical Notes: Drill the defective lifter bore to 1.044". Shrink the sleeve by cooling it to -40ºF and insert it in the lifter bore, making sure that the bottom of the sleeve is flush with the camshaft cavity. Drill a 7/16" hole through the oil gallery and finish the sleeve ID to .8432/.8442". The sleeve can also be predrilled with a 1/2" oil hole before installing it in the block.
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5234890
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Hydraulic Tappet (Roller)
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Hydraulic roller tappets were introduced in production small-block and V6/90º engines in 1987. Hydraulic roller lifters improve fuel economy and performance by reducing internal engine friction. This lifter can be used with production and high-performance hydraulic roller camshafts.
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Technical Notes: Hydraulic roller tappets are .63" longer than flat tappets. Hydraulic roller tappets require an induction hardened camshaft, special pushrods, lifter guides P/N 12550002, and guide retainer P/N 14101116. Hydraulic roller tappets should be installed only in 1987 and later production blocks designed for roller cams.
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