06 DD 60 Series Oil in coolant

Detroit 60 s , 2006 , freightliner century i had the same problem oil in coolant , changed the cooler flushed the coolant system But now again i see oil in coolant. I am new into trucking your advice is much appreciated and will really help me.

 

Did you flush it good with detergent?

 

Oh yes , flushed it with good detergent and have also made one trip with detergent and water and then drained it and did some more flush and then added coolant.

 

Today i see black in coolant reservoir and smells like diesel too .. can be mix of oil and diesel in coolant now. How serious is this ?? Thanks for your input.

 

Could be injector cups. My friend had the same problem,diesel in coolant,same engine. He replaced cups and everything is fine since. Around $1500 here in chicago

 

Oil will usually look gray, slimy, builds up on cap, Fuel in coolant? I can’t say where to start. Injector o rings maybe, I’m not a Mechanic, Trying to figure mine out, air in fuel, myself, good luck, hopefully some of the real mechanics, familiar with your engine will show up.

 

He’s probably right about that, same as my 12.7, I think they can change yours, without pulling the head. If it’s a 14L

 

Probably oil cooler everyone eventually needs one

 

Hello sir,,, I was reading thru your reply to the initial question/onset of this thread...I have a 2004 Columbia 60 series but with coolant literally vanishing from my coolant reservoir & somehow finding its way into the crank case no coolant leaks are visible...with the coolant reservoir topped off truck will run fine...come out the next day & the coolant is gone...well below the shut down sensor on the reservoir...checked the oil & it’s over full by two or three gallons...but oddly enough not milky or discolored...just way up on the dip stick...any ideas or advice would be greatly appreciated thx!
BRS