oil in radiator

After you replaced the oil cooler did you flush the coolant system out? It usually takes a few flushes with dish soap to clean it out.

 

I usually run dawn dish soap and run it to operating temp pull the small hose from thermostat housing to radiator, at radiator, put a water house in the fill hole for the radiator and run the truck until its clear. The only other thing it could be is tyranny fluid. Check the tyranny fluid level if your trans is water cooled

 

I'm not up on today's engines, yet in yesterdays engines oil can get into the radiator because of the head. Once coming from west coast at around Abilene, TX my truck engine started missing. A push tube broke, replaced it & all seemed well, yet it was not.

On the next trip I was getting oil in the radiator, when the push tube broke it damaged the copper in the head, thus pushing oil into the radiator. Changed the head out & all was well. This was in about 78 with a 400 Cummings.

 

Where will the oil cooler be at on a 1999 Mack ch613 engine: e7.

 

Crap, this showed up and I commented on a old post...

 

Have you found problem?

 

i am facing issue since last month small amount of engine oil was in my coolant i have replaced cooler but mechanic did not flush with soap now we flushing daily with clean water looks like clean but coolant tank looks darker still