Recently I removed my old aftermarket A/C from my 230SL, including removing the large and heavy A/C compressor bracket and relocating the alternator back to its lower position. I also replaced the water pump and fan clutch. After putting everything back, ie. radiator etc., I ended up with a slow leak of the new blue antifreeze. I cannot find where the leak is originating. I put thread sealant on the bolts of the new water pump. I did not touch the water pump housing. I wonder if one of the bolts that were used on the previous large compressor/ alternator bracket is the cause of the leak. I checked the (5) bolts that hold the water pump and there is no leaks from them or the gasket. I really wished I knew exactly which bolts go into the engine block and come in direct contact with the coolant. It took a long time to put everything back together, including the grille assembly. I thought I might pick your brains and see if anyone knew which specific bolts could be the cause of the leak because they make contact with the coolant in the engine block. I'm thinking that the leak could be coming from behind the new lower alternator bracket. If any of those bolts might have required sealant, then I did not do it right. Any help would be greatly appreciated.
