Coolant problem, I have been having to add coolant every 2-3 days?

Okay Al, we done it! So, apparently the coolant leak in EGR cooler for 20,000 miles leaking into exhaust took out the EGR assembly and both oxygen sensors. The purge valve solenoid that I replaced I think was bad too because that’s right up by the throttle body. I today have no check engine light on and reran the scanner and it said this car had no codes. Thanks again for all your help! Now a transmission and my car be brand new again. Knock on wood!

Yes the dealership did the EGR valve assembly and the EGR cooler and the intake for free. When I got it back the check engine light was on when I picked it up, I was tired of their crap so I brought it home. Then I ended up replacing rear o2 sensor because they had the wiring harness touching the exhaust manifold and burnt the insulation, but wires looked okay, but you never know, then most codes pointed to o3upstream sensor. So I replaced that as well and I used rock auto.. Com do I ordered the solenoid purge valve to because of a suspicion I had because it’s right at the throttle body. And now the power is back has milage is over 40 mpg highway, should get about 50 city cause it uses more electric in short stop and go traffic. So I think this nightmare is over . So to recap it : at about 90 some thousand the head suppose to have went do they replaced head under warranty. At 97 thousand miles the motor spin a bearing so the put new motor with another new head on it it came with, this whole time since head number 1 was put on it was still drinking coolant. After new motor and head it still was drinking coolant so they replaced the new head with another’s new head and that’s all warranty work so far, still drinking coolant and told them it’s gotta be the EGR cooler because it’s going somewhere and it’s not in oil or external leak. Now they said it’s the intake manifold y cracked and it’s losing it there and getting into exhaust, I spoke with the mechanic on this and he argued with me that my car has no EGR cooler. So I gave up and said ok put the manifold on which was under warranty. I said I’ll be back again with this problem. When I dropped it off for the manifold replacement I demanded that cool to be taken off and inspected for internal cracks. Went to pick up the car and they put a new EGR cooler on free of all charge. I looked and went back in and said where is the new manifold? They never put it on. Do I left it there for that to get done. Mechanic finished it and the check engine light came on so he put a new EGR valve assembly on free of all charges, so then figured they did do about 1500 worth of parts and labor they should of charged me for I’ll finish it up. So a good 20-30 gallons of coolant was evaporated through exhaust after it went through the EGR system to get in there. That coolant took the EGR valve out and both oxygen sensors and the purge valve solenoid, so I got lucky money wise. Cost me about 250 in parts to get normal again, and 20-30 gallon of coolant at almost 20 bucks per gallon, so I made out good in the end. And I ow it all to your help, I wouldn’t and couldn’t of done this on my own, the damn dealership couldn’t even do it. Don’t think I missed anything. I appreciate all your help, emails and diagrams and diagnosis on this. It was a great pleasure meeting you and I hope to meet you sometime but maybe in the bar next time for a cold one. I got the shots of cars for a little bit.
Thanks
Mark Goodwin