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Old 08-26-2007, 05:14 PM
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Is there a difference in the Block betweeen a roller and non roller? if so what is it?
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Old 08-26-2007, 05:22 PM
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hydraulic roller lifters ride on the "roller" camshaft in a roller motor.

Non roller are flat tappet lifters
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Old 08-26-2007, 05:30 PM
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blocks are the same. one has some different parts.
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Old 08-26-2007, 06:42 PM
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the blocks are not the same... one is designed to use flat tappet lifters and a roller block uses hydraulic roller lifters...thats why they call one a roller block and one a flat tappet block...ford started using roller blocks in 1985 thru 1995 in mustangs...i think the explorer went untill 1998 with the 5.0
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