RookieRD12 Posted March 19, 2014 Share Posted March 19, 2014 I'm very new to this forum & to the trucking thing. I've noticed that oil is coming out from the breather that sits on top of centrifugal filter in my 99 Mack RD688S. I was wondering if someone can please help, I'd appreciate it. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/35096-oil-coming-through-the-breather/ Share on other sites More sharing options...
Mackpro Posted March 19, 2014 Share Posted March 19, 2014 Blow-by filter on timing cover clogged. removed top cover and wash out wire mesh screen. If it has milky sludge in the filter you might have leaking liners. Quote Link to comment https://www.bigmacktrucks.com/topic/35096-oil-coming-through-the-breather/#findComment-238184 Share on other sites More sharing options...
RookieRD12 Posted March 19, 2014 Author Share Posted March 19, 2014 Ok, I'm really trying not to sound like an idiot but where exactly is the blow by filter on the timing cover? I've tried to look it up before asking this but I can't seem to find anywhere on the web where it states/illustrates where it's located. I really appreciate the help Mackpro Quote Link to comment https://www.bigmacktrucks.com/topic/35096-oil-coming-through-the-breather/#findComment-238192 Share on other sites More sharing options...
turckster Posted March 22, 2014 Share Posted March 22, 2014 The engine breather filter is in a canister located at the right(passenger) side of the front cover. The canister is mounted to the front cover. Once you get the lid off the cover, use needle nose pliers to remove the filter element. Quote Link to comment https://www.bigmacktrucks.com/topic/35096-oil-coming-through-the-breather/#findComment-238538 Share on other sites More sharing options...
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