Tommy9 Posted May 24, 2016 Share Posted May 24, 2016 the screen under my oil cooler keeps getting clogged causing back pressure which blows the radiators .. I do not over heat I do not lose compression I do not blow any color smoke I do not have antifreeze in my oil I need help the Mack dealer can't figure it out Quote Link to comment Share on other sites More sharing options...
AZB755V8 Posted May 24, 2016 Share Posted May 24, 2016 First what year, model and engine are you asking about? What is in the screen? That would be my first though to figure what is in the oil and if it is in the screen where else is it going or coming from? What type of hoses and how old are they? If this crap in in the pan what shape is your oil pump. What is your oil pressure? If it is causing back pressure to blow the tank it is restricting flow to the engine, not good at all... Just a note some of us need glasses but you don't need bold print for us to read it. Quote Link to comment Share on other sites More sharing options...
fjh Posted May 24, 2016 Share Posted May 24, 2016 Sounds to me by your description that you Are suffering from compression getting into the cooling system! First thought would be low liner protrusion! the other thought is to much DCA testing the coolant and only adding it when needed is the solution if this is the case! Some engines were built on low spec 19 to 23 thou The ideal spec is 25 to 28 thou! Quote Link to comment Share on other sites More sharing options...
Tommy9 Posted May 25, 2016 Author Share Posted May 25, 2016 21 hours ago, AZB755V8 said: First what year, model and engine are you asking about? What is in the screen? That would be my first though to figure what is in the oil and if it is in the screen where else is it going or coming from? What type of hoses and how old are they? If this crap in in the pan what shape is your oil pump. What is your oil pressure? If it is causing back pressure to blow the tank it is restricting flow to the engine, not good at all... Just a note some of us need glasses but you don't need bold print for us to read it. Sorry I didn't know it printed out on hold type oil pressure is around 200 the screen is inside the y shape hose coming out of the oil cooler which I replaced as well as the egr cooler .. Water pump .. Air compressor .. Thermostats Quote Link to comment Share on other sites More sharing options...
Tommy9 Posted May 25, 2016 Author Share Posted May 25, 2016 2005 Vision i believe it's the aset engine 350/380 Quote Link to comment Share on other sites More sharing options...
Tommy9 Posted May 25, 2016 Author Share Posted May 25, 2016 10 hours ago, fjh said: Sounds to me by your description that you Are suffering from compression getting into the cooling system! First thought would be low liner protrusion! the other thought is to much DCA testing the coolant and only adding it when needed is the solution if this is the case! Some engines were built on low spec 19 to 23 thou The ideal spec is 25 to 28 thou! So how would I have the low liner checked ? Quote Link to comment Share on other sites More sharing options...
fjh Posted May 25, 2016 Share Posted May 25, 2016 (edited) the heads have to come off Sounds like you grasped every other straw Also recently we had to stuck injectors due to bad sleeves another possible source of compression in coolant Edited May 25, 2016 by fjh Quote Link to comment Share on other sites More sharing options...
kscarbel2 Posted May 25, 2016 Share Posted May 25, 2016 On 5/24/2016 at 9:13 AM, Tommy9 said: the screen under my oil cooler keeps getting clogged causing back pressure which blows the radiators .. I do not over heat I do not lose compression I do not blow any color smoke I do not have antifreeze in my oil I need help.......the Mack dealer can't figure it out. Assuming your Mack brand dealer actually "can't figure it out"............. When you called the Mack brand customer satisfaction at +1 (866) 298-6586 , what did they say? Quote Link to comment Share on other sites More sharing options...
Tommy9 Posted May 25, 2016 Author Share Posted May 25, 2016 I didn't know you could call someone .. Thanks for the info yes I believe my next step is to take the heads off ... Thanks everyone for the help I'll post a comment of what I found Quote Link to comment Share on other sites More sharing options...
Ol2Stroker Posted May 31, 2016 Share Posted May 31, 2016 200psi oil pressure?! Quote Link to comment Share on other sites More sharing options...
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