We Test lifter preload & determine pushrod length | 351W iron vs. aluminum heads
Автор: 1 Stock Cam
Загружено: 2019-02-18
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In this how to, we are checking acceptable lifter preload for most classic pushrod engines with hydraulic roller lifters, using the small block Ford Windsor engines as an example.
To set the target, we measured a 96 F150 351w that hadn't been disassembled yet. The winning number is .050"
I am not using a pushrod checker tool, just a pair of calipers and a razor blade. Pretty simple, but as you can tell from this video it takes a little time.
Including making a solid lifter using washers, and measuring all the cylinders in this way, it was a 3 hour process. One intake valve measured 0.030" longer than the rest, and needed a different thickness shim for that cylinder.
The engine is a 94 F4te roller 351w from a truck, with a set of Blueprint engines aluminum cylinder heads (2.02" intake valves, 1.60" exhaust).
I used a set of Ford Racing pedestal rocker shims from .030" - .060" and Manley 25755 5/16" 0.080" wall pushrods, 7.550" length.
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