i have a water leak near the water pump in my 1990 cadillac deville i replaced the water pump but it was remanufactured and a pipe on the back of the water pump can it be a heater core or should i buy a brand new one p.s. water leaks after it passes the radiator
The 1990 cadillac water pumps were big old things. They took up most of the front of the engine and GM left very little room to get to the bolts. One problem you could be having is bolt placement. Not only were there about 15 bolts holding the pump on, but they were also all different lengths. If you do not put them back in the right order you can end up cracking the new water pump housing, or leaving a gap between the pump and the bolt head where water can leak out of. Check that.
this is why I do not buy remanufactured pumps, it is best to buy a new water pump if you can, it will last the lifetime of the car pretty much, remanufactured for what ever reason the water pumps just did not do the job, and I know my mechanic got tired of putting one on, only to have to take it off because it leaked, make sure the water pump is the problem though.
it would,nt be the heater core because it,s a good ways from the water pump. it might be that the water pump gasket slipped when you were putting it on or the by-pass hose is bad or loose. check all the hoses like both radiator hoses and where the heater hoses hook up to the block.
