For Toyota specifically, in the mid 90s, 4Runners had headgasket problems. They were replacing them for free on a service action, even outside of warranty. What did Toyota do to change the replacement headgasket sets so they wouldn’t fail at 80K miles? Nothing.
Actually the issue you are referencing affected both 4runners and pickups 89-95 with the 3.0l V6 3VZ-FE, and the cylinder heads themselves were prone to warping. Offering to slap new gaskets in was a cop out, no change to the gaskets would have been able to correct the issue. Most second gens still on the road have either the extremely well regarded 2.4l I4 22R-E or an engine swap. The 3.4l V6 5VZ-FE is in my opinion an ideal candidate, but the Toyota UZ series V8 Chevy 4.3l V6 and Buick 3800 Series II are also popular choices
For Toyota specifically, in the mid 90s, 4Runners had headgasket problems. They were replacing them for free on a service action, even outside of warranty. What did Toyota do to change the replacement headgasket sets so they wouldn’t fail at 80K miles? Nothing.
Actually the issue you are referencing affected both 4runners and pickups 89-95 with the 3.0l V6 3VZ-FE, and the cylinder heads themselves were prone to warping. Offering to slap new gaskets in was a cop out, no change to the gaskets would have been able to correct the issue. Most second gens still on the road have either the extremely well regarded 2.4l I4 22R-E or an engine swap. The 3.4l V6 5VZ-FE is in my opinion an ideal candidate, but the Toyota UZ series V8 Chevy 4.3l V6 and Buick 3800 Series II are also popular choices
You have bested me.