Chad H - 3/6/2008 20:19 The theory that jake braking is hard on an engine came from those that do not understand how a jake brake works. Some just assumed that a jake uses compression on the stroke to slow the engine down when in fact it does just the opposite. The jake opens the valves and lets out the air on the up stroke as the engine is coasting rather than letting that compressed air push the piston back the other way. It's nothing more than a myth. You didn't get it wrong, Chad's words speak for themself. Maybe he didn't mean what he wrote but there is little dening what he wrote - unless, of course, this was the phantom. | 
Jake brake use
