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Power Strokes
6.4 Aftermarket
Upcoming Head Gasket replacement
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[QUOTE="kleake, post: 1459644, member: 25987"] And just to confirm the rockers are in fact what is different, I put in my original push rods with the new rockers. 2 blue paper towels between the rocker and the bridge and I start to lose a small amount of pressure. 3 paper towels and i'm losing 70%. So to verify, I switch to my factory rockers and I can put 16 paper towels in, and the rockers still wiggle and I'm not losing any pressure yet. Confirming, the rockers are in fact different, and the shorter push rods allow for the change. I can only suspect that my engine has tighter tolerance than most, causing it to be beyond the available range once the rockers were changed where most I guess are still within range, although likely right at the end of the lifter travel. [/QUOTE]
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