Just replaced the pressurized plastic expansion tank on my grandson's BMW.
To remove it from the rad connection it breaks the plastic thermostat housing. Wholesale parts were over $300.
Later that day, I found another old tank and housing in the trunk, from the previous owner, I presume.
Last week I had to replace the oil cooler/filter seals UNDER the intake manifold of my daughter 3.6 Caravan .
Thank you You-tube ! !
Who designs these things ? ?