This here to me sounds like a t-stat. If your water pump failed you would have hot on both hoses. At least for me that happen when the Bosch pump failed. I would recommend that you replace t-stay and fully bleed your cooling system and try it.
Originally Posted by H2oallyear
. The rad hose back into the thermostat was cool and out to the rad the hose was very hot. No expansion tank leaks. The hoses were soft and squish able. It seemed like a t stat or water pump sudden failure.
The previous owner had great records so I looked them up and the same issue happened only 11k miles ago and he had the t stat. Water pump and thermostat and all gaskets and vent screws changed at the BMW dealership where he bought it. Now I am stumped as to what this may be. Any ideas???
1999 528iT Sold
1994 540i Toy
2014 Jetta Turbo APR stage 1 daily driver.. FUN!