The local high school auto shop recently replaced the radiator in my 2006 Yukon and did not connect the oil lines correctly. The oil leaked out and the engine stopped.

Remove both hoses undo trans pipes unbolt radiator from car lift out.

Guess you did not get the same lines as what you had. You got the length but not the correct thread type for you car. Most USA equipment runs BSP pipe fittings but imported units run metric. have some one apply a thread gauge to your fittings and compare to old fittings and get the same threads

Have the cooling system pressure tested by a local shop, you have a leak somewhere.

on line, auto zone has a o ring for oil cooler at a reasonable cost. if the cooler is contaminated or corroded it needs replaced. if you need one, go online for the best deal. for it cools the oil for the engine. let them know at auto zone, and they should be able to advise you. car dealerships are a big ripoff. a fan blows air on engine oil cooler for disipation off heat. this is important to regulate the tempurature of the oil. have a very good day !!

Hello: Check the coolant level if the surge tank is not at proper level (threre is a full line on the container) If the container is low then you may have a leak in your cooling system.

If the thermostat and pump have been replaced, it's most likely the radiator. They corrode after time. Try flushing the antifreeze (not just draining and refilling it, but flush the system with clear water.) Most auto stores, Walmart, etc. carry the flush kit for very little $$. Once it's flushed, refill the system with the correct ratio of antifreeze.

If the problem persists, then it's most likely gunk in the radiator. Auto shops can boil them clean.

Short of all of the above, overheating can also be caused by a cracked cylinder head. If it overheated too bad at any point, it can crack the head and will continue to overheat regularly. Check for antifreeze in the oil. If there "is" antifreeze or water in the oil, the head is most likely shot (and yes, it will still run that way).

Steam? are you talking about the oil cooler lines? thats the only metal lines I can think of on the left side of the radiator, but those would leak oil. if so there is a o-ring in the fitting that can be replaced. I'm just guessing thats what you are talikng about.

you could look for a paper tag with the part # on it but more likely if its missing you describe the hose to the auto parts person/ approximate length,and where does it connect to at both ends-the a/c compressor,near the firewall,the a/c condensor which is in front of the radiator and looks like a "skinny"radiator-if you know the names of the A/C SYSTEM PARTS.or the parts guy might be able to pull up a diagram on his computer screen.hope this helps you.

It;s a very difficult task. Pay the money and ease yourself off stress.

The lines have holes in them? Or are they just leaking at the connections? If just the connections, then all you need is two wrenches of the correct size. One on the permanent fixture nut like the radiator or the transmission, and the other wrench goes on the line. After removal, clean the threads, and apply some teflon tape and reassemble. tight is tight, and too tight is broke (stripped).