Toyota's recall operation, say you may not believe it - there is a problem with the engine of 250,000 cars, it does not intend to change it all, but takes out a hammer. The cause of the incident was the Toyota V35A-FTS 3.4-liter twin-turbo V6 engine. During the machining of the production line, the metal debris was not cleaned up and remained in the cylinder block. For a long time, it may be embedded in the crankshaft main bearing, worn out the bearing, and finally the engine directly lay down. Tantu, Lexus LX600, GX are all using this machine, and the total number of recruits has exceeded 250,000. According to the normal thinking, the recall will change the engine. But Toyota sent a new program to dealers, called the "hammer test method" - take the hammer and knock, after knocking to see the data, the data said it was okay to change. Of course, this is not a simple knock. First drain and replace all the oil, preheat the engine to the specified temperature, remove the accessory belt, turn the crankshaft to a specific angle, and install a special acceleration sensor on the pulley bolt. Then the master picked up a 250 gram plastic head hammer, aimed at the 3 o'clock position of the pulley, knocked three times, and every effort had to meet the standard. The sensor transmits the vibration frequency to the cloud. Compared with the frequency database of the normal engine and the faulty engine, if the frequency is abnormal, the engine will be changed. If the frequency is normal, it can be driven away. Listening to Xuan Xue, there was actually a scientific basis. After the metal debris is embedded in the main bearing (especially the No. 1 main bearing), the resonance frequency of the bearing will be different from the normal, and the hammer test is essentially an acoustic diagnosis. By capturing the frequency offset, it is judged whether there is internal damage. But then again, the plan is straightforward: save money. 250,000 cars with all the engines, that's a few million dollars, sieve it with a hammer, you can save a lot of money. According to public information, this is Toyota's third round of recalls for the V6. About 102,000 vehicles were first recalled in May 2024, and Toyota has replaced more than 70,000 units since then. And the 100,000 owners of the next batch did not wait for a new engine, it was this 250-gram small hammer. In June this year, Toyota added about 44,000 units of 2024 Tantu and the recall of Lexus LX and GX, with a total scale of 250,000 units. (Compiler/Car House Li Na).