For Toyota SUV;s ad minivans equipped with a rear heater core, the plastic tee that splits the coolant flow becomes brittle with age and can fail with catastrophic consequences: complete loss of coolant and overheat. This is a big problem on any engine, but on a 2AZ-FE that is susceptible to the head lift issue, it is even worse. In this video we show the broken plastic tee and the area of the head lift on a 2.4-liter 2AZ-FE in a Toyota Highlander equipped with third row seat. This issue affects any Toyota SUV or minivan equipped with third row seat, including Toyota Highlander and Toyota Sienna and Toyota RAV4. It can affect all engines including 2GR-FE 2AZ-FE 1MZ-FE 3MZ-FE engines and potentially others.
Watch this video to see what an actual head lift looks like.
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#coolantleak #minivan #SUV #toyota #highlander #sienna
TRANSCRIPT
hey this is Frank this is a 2005 Toyota Highlander with a 2azfe 2.4 L engine this car is in the shop because the engine overheated the overheat was severe and it caused the head to lift so right here right above the transmission is where the head lifted and you can still see the oil that came out the cause of the overheat was this plastic T that connects the rear heater core to the heater hoses from the engine and branches them off from the heater core in the front of the cabin this $15 part cost this customer an entire engine this potential catastrophic issue of this plastic te affects a wide range of Toyota vehicles that have a rear mounted heater core this includes uh Toyota Highlanders with a third row seat it includes Lexus RX uh 330 and 350 it includes Toyota Sienna minivans and possibly other vehicles any vehicle that has the rear mount heater core for the passengers is suscept able to this issue these are the two heater hoses you can see the plastic te that has broke versus the one that is not broken if this plastic piece breaks then the coolant will leak out under pressure very rapidly and because it is back near the firewall then what happens is it does not come in contact with the hot engine and the driver will not see any steam coming out so by the time that they realize what's going on unless they're monitoring their temperature gauge very closely it's too late and particularly on this 2az FE engine which is susceptible to the headlift problem the engine is done for once it's overheats thank you for watching this video I hope it alerts you to a very important issue that could be affecting your car so please do take it seriously and check whether you have these hoses present for the rear heater core and if you do then replace the plastic pieces with new ones that are less likely to fail
15 ноя 2023