If it is not losing coolant I would expect a plugged radiator.
In a vehicle- a blown gasket caused by overheating, block warpage
you may have a bad head gasket its letting oil seep into your coolent have your heads checked for warpage and check the block cracks too.
You would change the head gasket. You would also have the head checked for cracks and warpage. You would also change the engine oil and filter.
Warping in welding is caused by shrinkage of weld metal, faulty clamping of parts, faulty preparation and overheating of joints. Distortion in welding is caused by uneven heating, improper sequence and the shrinkage of the deposited metal.
There are many factors to be considered in this - what caused the original gasket to fail? Was there head warpage? Overheating? has the head gone "porous"? Was the head skimmed (if needed) or was a thicker replacement gasket used? More info required.
Just like you would repair car engine was a blown head gasket. Take it apart and replaced the head gasket. Make sure and have the head checked for cracks and warpage.
The 1996 Saturn more likely has a blown head gasket. The gaskets will give this problem. If the head is in doubt it can be checked for warpage.
With a straight edge and feeler gauges.
Longitudinal shrinkageTransverse shrinkageAngular distortionBowing and dishingBucklingTwisting
9 times out of 10 it's the head gasket on an aluminum engine, usually because of warpage due to overheating. You will have to pull the head(s) involved and replace gasket. A machine shop will have to check cylinder head to see if it needs milled to straighten mating surface. If overheating caused it, will have to fix whatever the problem is in cooling system as well. Check fluid level and se if unusually low and oil for signs of water in it.
waprage is distortion of elements when there is curvature the elements are not perfectly along the curves
No more then 0.007 thousand