Gambi80 Posted March 12, 2009 Share Posted March 12, 2009 I've got a '97 CH with the "stealth" engine brake. I'm just curious what all is different with the regular jake vs. the stealth in my Mack. All I've been able to find is that other than the obvious lack of noise and the butterfly in the exhaust and from what I've read, stiffer valve springs. Mine doesn't work with a crap really and I guess what I'm getting at is could mine be changed to the "regular" style...with minimal engine mods...? Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/ Share on other sites More sharing options...
fjh Posted March 12, 2009 Share Posted March 12, 2009 stealth is a jake/ exshast combo They usually work well when both are workng!Can you hear the jake working? can you feel a diffrence between hi an low setting? Quote Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/#findComment-31994 Share on other sites More sharing options...
Gambi80 Posted March 12, 2009 Author Share Posted March 12, 2009 I had it fixed at the local Mack dealer here last year...new solenoids, ran the rack and so on. They say..."it works great!!.." It worked well for a while, but now there's no difference between low/hi. I unhooked the exhaust brake underneath just to see if the jake on the motor was working at all and it was-only on the low side.I guess I want to know if these things can go "bad" and if so, if it needs to be replaced if one off a later model engine would bolt right up and do away with the exhaust brake and be more effective...for simplicity. Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/#findComment-32009 Share on other sites More sharing options...
fjh Posted March 12, 2009 Share Posted March 12, 2009 I had it fixed at the local Mack dealer here last year...new solenoids, ran the rack and so on. They say..."it works great!!.." It worked well for a while, but now there's no difference between low/hi. I unhooked the exhaust brake underneath just to see if the jake on the motor was working at all and it was-only on the low side.I guess I want to know if these things can go "bad" and if so, if it needs to be replaced if one off a later model engine would bolt right up and do away with the exhaust brake and be more effective...for simplicity.Low operates jake only! hi operates jake and stealth.if you want it to work properly the steath needs to be there! Quote Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/#findComment-32040 Share on other sites More sharing options...
Gambi80 Posted March 13, 2009 Author Share Posted March 13, 2009 Low operates jake only! hi operates jake and stealth.if you want it to work properly the steath needs to be there!Hmm...mine must either work differently or improperly. Service guy said low/hi is either half or full jake. I had the floor pan off last winter and could see the air cylinder open and shut the valve for both. Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/#findComment-32052 Share on other sites More sharing options...
fjh Posted March 13, 2009 Share Posted March 13, 2009 We only sold a few of these but fom what I remember the jake was on one seting and both on the other. Quote Link to comment https://www.bigmacktrucks.com/topic/8619-engine-brakes/#findComment-32087 Share on other sites More sharing options...
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