Oil leak at oil cooler (or radiator)
 

Ok, need a little help here, just wondering if anyone has had any problems will the engine oil cooler lines leaking. My lower line on my 2001 4x4 blazer seems to be leaking, or is it possible for the radiator to leak oil. The reason I ask is after replacing lines and o rings it is still leaking. Does anyone no if the radiator could be leaking oil.

Where exactly is the oil coming from?Is it coming from the radiator area, or the engine area?

Drivers side bottom at radiator.

Well, if you replaced all 4 lines with new ones, then I think one of these three conditions exist:

1) You have hole in your radiator's oil cooler

2) You got a defective line

3) Installation of the lines didn't go so well. Make sure that the fittings that screw into the radiator are tight, and make sure the oil cooler lines are pushed all the way into those fittings with those safety clips installed...

Hope that helps!

Thank you for your help. So your saying the radiator can leak oil because that's what it looks like to me.

Yep, the oil lines that go into and out of the radiator carry oil into a little cooling deal in the radiator. You can remove the lines and pressure test it.

Ok thank you

​​Hello I know this post is old but how does one pressure test the radiator to determine if the oil cooler is leaking inside?