After the last race last season, I decided to fill the cooling system with a 50/50 mix, to get the car through the winter. After releasing the cap, I noticed a small puddle of water in front of the car. Somehow, removing the cap allowed the piece of debris to release from the hole it caused and the radiator "peed" on my carport floor. Why it held for so long is a mystery…
I bought the Bimmerworld rad and it went right in. Reasonably priced and having never had a cooling problem, I’ll stick with these. Replacing it every two or three seasons is probably a good PM thing to do.
Carter