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Power Strokes
6.7 Tech
2015-2016 Super Duty Active Regeneration Jack Hammer Valve Issue
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[QUOTE="CurtisF, post: 1273398, member: 829"] There would still be marks on the pistons and valves. And you still can't explain why this only happens earlier in the regen cycle, and also why it only happens at very specific RPM's and engine loads. Thermal expansion on the valve stems causing sticking valves would have the symptoms persist as you continue to apply heat. Thermal expansion wouldn't care about RPM's, only heat. In fact, if the valves were sticking, increasing RPM's would make the problem WORSE, causing even more problems. And because this heat is continuously applied, it would also keep occurring late into the regen as well. Yet it all magically disappears when you downshift and increase RPM's, and also as the regen continues along. [/QUOTE]
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2015-2016 Super Duty Active Regeneration Jack Hammer Valve Issue
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