Thermostat Soft-Failed at 85k - Do I need to replace other parts?

[Len]

Originally Posted by cn90

For M54 engine, the 2 plastic hard pipes are good until 20y/200K or so, as long as you don't touch them. They don't burst but rather leak a bit here and there, if it happens.

The tstat failure is a good wakeup call.
I posted a DIY "Partial Cooling Overhaul" if you have around 100K-130K or so...
It is in this forum.

Thanks. I’m at 85k. I wouldn’t have to mess with the plastic pipes or even push them out of the way at all to replace the tstat would I? If not I may just do the tstat and save the cooling overhaul for around 15-20k miles or so. Currently no coolant leaks *knock on wood*