Oil leak by radiator

[Hotrdd]

Have a 1999 Yukon 5.7 that is in really good shape but has started sprouting some leaks. I have oil leaking out of the front of the truck by the radiator. Every morning there is a small puddle. I pressure washed and regressed the engine bay and think that the leak is coming from the drivers side but all of the hoses and connections to the rad area seem fine. What should I be looking for or any ideas on how to track down the leak? Is there something common here?

 

[fire730]

Its usually leaking where the engine oil cooler lines hook up on the radiator.

 

[Hotrdd]

I ran the engine for a bit and then ran my fingers around the pipe connections to the radiator but they were clean. Is the oil cooler a separate unit or is all of the rad one piece? Any ideas on how to get more specific on where the oil is coming from?

 

[SunlitComet]

those are the engine oil cooler lines that go into the radiator. if the lines them selves are not leaking there are o-rings where the lines enter the radiator that can be replaced.

---------- Post added at 08:00 PM ---------- Previous post was at 07:59 PM ----------

oil cooler is built into the radiator.

---------- Post added at 08:02 PM ---------- Previous post was at 08:00 PM ----------

Also put some UV dye in the oil and spot the leak with a UV light at night. Its trail will stand out.

 

[Hotrdd]

I put some dye in the oil and am waiting to see what shows up but I suspect that all of the oil may have just been from the steering hose leak I had a month ago. Now that I have all the covers off I'm not seeing any more oil.