I'm not going to be a dick, but the truth behind recalls on safety based issue is deaths/incidences per 1000. Don’t believe me, go do a little digging. Manufacturers usually only recall parts related to safety, and you will be hard pressed to get them to cover anything related to mechanical malfunction or excessive wear item. They will simply redesign the part and discontinue the faulty component, then replace with the redesign when it fails. To say 100k is an acceptable lifespan for a head gasket with modern technology, is a pretty piss poor fatigue and design basis for any manufacturer. Keep in mind that the majority of the big names are now designing vehicles so they can only be serviceable at the dealer. Quote me on that in 10 years and let’s see where we are.
Sounds like you have a diesel background as well. I run a business specializing in repair/performance, and one off truck design/diesel motor builds. The only motor that I have ever seen with a failed head gasket near 100k were the 6.0s. Eff they were blowing head gaskets with less than 50 miles on them. I blew a head gasket on my friends truck the day he bought it. This issue however was recalled by FORD because of the insufficient torque spec on the head bolts. Every GM, DODGE, FORD diesel motor I have ever worked on typically had OE head gaskets from the factory… and yes a lot of those motors pushed well past 300k before needing one (usually due to another component failure or lack of maintenance) . I have over 560k miles on a bone stock 7.3 with the original head gaskets. Had a 12v 5.9 in here last week with 739k on the OE upper and lower set. I rarely touch a head gasket unless we are studding a motor, for 60+psi in manifold pressure.
Anyways… I’ll get off my soap box. The point I’m making is this issue occurred on a low mileage engine in my opinion… Toyota’s response to my relative I fixed this motor for is “You need a new Engine”. Yeah GFY Toyota. I despise dealerships with a passion, simply due to their lack of due diligence and lust for a quick buck. Is TOYOTA going to fix the problem....hell no, go enjoy 3-5k for a head gasket job at your local stealership!
Sounds like you have a diesel background as well. I run a business specializing in repair/performance, and one off truck design/diesel motor builds. The only motor that I have ever seen with a failed head gasket near 100k were the 6.0s. Eff they were blowing head gaskets with less than 50 miles on them. I blew a head gasket on my friends truck the day he bought it. This issue however was recalled by FORD because of the insufficient torque spec on the head bolts. Every GM, DODGE, FORD diesel motor I have ever worked on typically had OE head gaskets from the factory… and yes a lot of those motors pushed well past 300k before needing one (usually due to another component failure or lack of maintenance) . I have over 560k miles on a bone stock 7.3 with the original head gaskets. Had a 12v 5.9 in here last week with 739k on the OE upper and lower set. I rarely touch a head gasket unless we are studding a motor, for 60+psi in manifold pressure.
Anyways… I’ll get off my soap box. The point I’m making is this issue occurred on a low mileage engine in my opinion… Toyota’s response to my relative I fixed this motor for is “You need a new Engine”. Yeah GFY Toyota. I despise dealerships with a passion, simply due to their lack of due diligence and lust for a quick buck. Is TOYOTA going to fix the problem....hell no, go enjoy 3-5k for a head gasket job at your local stealership!