67RModel Posted July 2, 2022 Share Posted July 2, 2022 (edited) On my 1994 RD with EM7 there is this gadgetry. I am wondering if it’s really necessary. I have never really seen it on any other trucks newer or older and quite frankly I have never used it even when cold starting and the truck starts fine without using it. The thing is after sitting for any length of time the truck is out of air and can’t cycle the air cylinders anyway. Also, if you were to use it the cylinder on the bypass duct crossing over top of the engine won’t return to closed when it’s switched to “off”. You have to tap it closed after you turn it off. I just see it as a more leak paths for boost air to escape from or leak past the bypass valve. Can I eliminate the whole system? Should I? What’s everyone else’s experience with these? I’m just looking for any information out there on this setup….. Edited July 2, 2022 by 67RModel Quote Link to comment Share on other sites More sharing options...
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