Trying to help diagnose my brother's truck. Its a 2010 Silverado 1500 6.2L. Coolant mixing in oil. New head gasgets and bolts and still same problem. I'm Making this forum to show what i came up with. I decided we should test. The oil cooler which is built into the radiator. We needed a block off plug for one side of the oil cooler. We looked for 3 hrs to find one and couldn't find one. I found this in my tool box and it fit perfect.....

 

Just hook the 2 cooler lines together with a piece of hose and clamps and run it that way and see if it is still getting coolant in the oil.

 

That's what I said! Lol We pressure tested it and there was no pressure leaking from the Oil cooler to the coolant system. It's new head gaskets,and new bolts. Probably has a cracked head or cracked block.

 

If the oil cooler was bad, there would be oil in the coolant.
And the "oil cooler" there you're testing, isn't that the ATF cooler?

 

Looks like a newer 2500 Chevy to me. I just had to replace the radiator in my work truck. It's a 2014 2500. It has trans cooler in passenger side tank and on driver side tank has a oil cooler. Also has no drain plug to drain coolant. Thought that was dumb. 😂

 

Dan,

On these Gov't Motors pickups, the driver side radiator tank is engine oil cooler, passenger side has ATF cooler.

 

OK, thanks guys. My '02 4.8 stick shift doesn't have any oil cooler on the radiator at all.

 

Don't wan't to be the party pooper,but ain't this in a wrong forum?

 

Some people need a high "threads started" count. I agree, fakespace would be a more appropriate place for this.

 

No, That is the oil cooler. The transmission cooler is on the other side of the radiator. I thought I was crazy but there is a transmission cooler and a oil cooler built into one radiator. I followed the hoses back to the oil filter just to be sure and sure enough, it's the oil cooler.

I thought there would be oil in coolant but, this truck has low oil pressure anyway so i wanted to be sure. If the water is under more pressure than the oil then it would mix water into the oil. Not sure what kind of water pressure it sees but he's only getting 15-25 psi oil pressure even before the whole water mix issue. He started having low oil pressure after replacing his hydraulic lifters. I think he did something wrong myself. He not a mechanic. Then he had a blown head gasket and a bad overheat. Now he has new head gaskets on both sides, new bolts on one side, and had the head on that one side pressure tested for cracks with no issue but still mixing water. After his overheat he was dumping 1/2 Gallon of water out of the exhaust pipe on startup. He either has a cracked block or a Cracked head or the other side has a bad head gasket even though it is new. Darn aluminum block and heads....

 

This one is a 2010. It does have a drain for the coolant but it is so hard to get to on the bottom driver side. It may as well not be there. The bottom wing darn near rubs the frame when trying to take it off. Easier to remove a hose which is An act of Congress To Do as well because they are in such a tight spot.

 

I wasn't trying to even make a thread about this. all I wanted to show off Was that I managed to get a Trailer tow ball to be the perfect thread for the radiator. I did not make this thread to get help. I Just couldn't help laughing seeing a trailer ball threaded into a radiator to block it off.

I do see now that i Didn't seem to word My first post correctly To ensunute that I did not need help. My bad. I was just trying to give a few people a laugh.

 

The answer when it comes to fixing a Chevy is scrapyard. Always scrapyard.

Unless it's a Corvette, which is likely to crash before it breaks down (aside from C8 Z06s apparently). In which case the answer is also scrapyard.

 

He made a ball block Chevy

 

Badum ching!