Coolant Leak(s)

[Tomahawk Dog]

The rear cross over coolant pipe/plastic/tube had issues early in the 3rd Gen production.
Toyota fixed many (at their expense if caught within warranty) and the cause was the plastic would leak at the formed mold line and/or connection fitting.

They should have made it from metal BUT lowering production cost was important (BUT it cost them in the end)
They say they changed the production to higher quality to fix the issue and it seems this is the case as the reports are few and far between.

Question to all,.....
Have you or anyone you know (not read of) had a leaking coolant issue on a 3rd Gen?
If so what year and at what mileage,....?

 

[drizzoh]

I haven't personally had the issue or known anyone that has had it, but my tinter works @ Toyota tinting as his day job and he told me to keep an eye on it when I bought my truck. This was back in 2020 though so maybe it was remedied by 2021. Hopefully it stays solid though.

 

[solscooter]

I have a late 2015 build. Just waiting till it happens

 

[EricKabin]

As the tubes get older and weaker, you may get sediment or debris inside that causes a leak. The sealing gasket between the tank and the radiator can also wear out, and that could lead to a leak.

 

[Tomahawk Dog]

Changing the coolant is recommended as it will be acidic over time and effect gaskets and seals.
Long life coolant does not mean "lifetime".

Also, I believe allowing the engine to warm-up from a cold start is a great idea as metal and plastic are affected by heat and cold temps.
Expanding at different rates and in extreme temperatures is even more important.

An easy and no cost preventive step that makes sense,..
even the human body needs time before going from a dead sleep to a full run to get "warmed up".
If not, your body will feel it sooner or later, so will an engine.

I like to idle the engine for a few minutes and longer on colder days, and never accelerate hard until it reaches operating temperature.
Some areas of the engine will remain cooler, this is normal as the engine takes time to reach an equally distributed heat level.
Plastic can crack if exposed to fast temp changes,... as does any substrate or material. "Nature of the Beast"

Coolant info,...

Source: https://youtu.be/OJZLMIl6XPo?t=42

 

[Danlf]

The rear cross over coolant pipe/plastic/tube had issues early in the 3rd Gen production.
Toyota fixed many (at their expense if caught within warranty) and the cause was the plastic would leak at the formed mold line and/or connection fitting.

They should have made it from metal BUT lowering production cost was important (BUT it cost them in the end)
They say they changed the production to higher quality to fix the issue and it seems this is the case as the reports are few and far between.

Question to all,.....
Have you or anyone you know (not read of) had a leaking coolant issue on a 3rd Gen?
If so what year and at what mileage,....?

I have at 70,000 and it is $1,500 repair at my Toyota dealer, I have had 2 tundra's go over 300,000 with no problems. This 2021 Tacoma Has been nothing but trouble