Radiator problems of the 2004 Toyota RAV4

My 2004 Toyota rav 4 started overheating/smoking while driving at 20 mph in a parking lot. I pulled into a parking space and saw leaking antifreeze and I hoped it was just a hose or the temperature gauge. I ran to the store, bought antifreeze, filled the radiator and was able to get it home. The next day, I drove it to a friends mechanic. The engine is leaking antifreeze due to the engine bolts stripping. Apparently Toyota installed steel bolts into an aluminum block and if the engine heats too much, the bolts strip out, causing the leakage. The shop said the repair will cost me 5k at a dealership and 3. 5k at a private garage. I contacted Toyota in California and their response was: discussion thread response (rob browning) 10/11/2011 06:11 am dear ms. _______________; thank you for contacting Toyota motor sales, u. S. A. , inc. We are sorry to hear of your concerns with the engine of your Rav4, and apologize this aspect of the vehicle did not meet your expectations. We do not show a special service campaign or recall for the condition you described, and thus do not have specific insight to provide. If you feel you have a failed or broken component, we recommend contacting the customer relations manager at your local Toyota dealership. We have documented your comments at our national headquarters, where they remain available for review from the appropriate departments. It is through feedback such as yours we are able to monitor and improve upon the quality of our product. If we may be of further assistance, please contact us via email or by calling 800-331-4331. We are available from 5 am to 6 pm, pacific time, Monday through Friday, and from 7 am to 4 pm Saturday. We have documented your comments at our national headquarters under file #. If Toyota has no knowledge of this then why have they created a repair kit to fix the threads in the head?.

Car was serviced may 28, 2009, then driven across country, from new york state. About two hours outside of austin, texas, the car began to overheat, was found to be completely empty of coolant. Car brought to Toyota dealership where no radiator or other cooling system leaks were detected, but the head gasket was blown. When they tore down the engine to replace the head gasket, they stated that "the bolts are stripped" and now the engine had to be replaced -- at a cost of $7000 +. The mechanic stated that he had seen other Toyotas with this problem and there might be a TSB out on it -- but it was past warranty and so were "stuck". No one can explain why the bolts would have spontaneously "stripped". The car has been sitting at the dealership for three weeks while we try to figure out what to do with it. The head mechanic says it isn't worth anything but he'll take it off our hands for the cost of the partial repair bill ($600). We're not getting the straight story, Toyota refuses to cover the repair, but there are postings all over the internet with very similar stories, including that Toyota has selectively "participated" in the repairs. There is no TSB for this car apparently -- but there are for cars with the same engine.