Third Expansion Tank in three months

[staflat]

Catch tank failure pretty common on the boxster. after my second tank started i ended up making one out of amuminum.i routed the returnee line far back in tank and used baffels.has about twice the capacity of stock tank.only downfall i wasn't able to figure out how to hook up the coolant level semsor.me myself am always scanning gauges while driving so IM not too worried about coolant levelness when I track car no more problems.