MAZDA WATER PUMP REPLACE/REMOVE

I Have An 86 Rx7 As Well As An 88 Rx7 Convertible. I Replaced The Water Pump From The 86 With The One From The 88. Mazdatrix Told Me They...

I Replaced Water Pump Started The Car And It Seemed Fine, About Ten Minutes Later A Boiling Sound Started Coming From The Water Reservoir.