Pipeliner917 Posted April 2, 2017 Share Posted April 2, 2017 I recently purchased a 2004 mack granite that has a rebuilt ai 427 motor. The original motor had a powerleash engine brake in it. When the new motor was installed, ( factory mack rebuilt longblock), the mechanic did not order the new motor with a powerleash nor did he swap over the old one to the new motor. Mechanic felt the powerleash is what caused the original motor to fail and told owner he was better off with no engine brake. The new motor only has about 3,500 miles on it. My question is, would I be better off with a jacobs brake or go with a mack powerleash when I have a brake installed. Quote Link to comment https://www.bigmacktrucks.com/topic/49371-jake-brake-or-powerleash-for-a-ai-427/ Share on other sites More sharing options...
fjh Posted April 4, 2017 Share Posted April 4, 2017 NO! THE power leash is fine Quote Link to comment https://www.bigmacktrucks.com/topic/49371-jake-brake-or-powerleash-for-a-ai-427/#findComment-366353 Share on other sites More sharing options...
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