I replaced the water pump on my 350 chevy small block and the thing is leaking out of the lower bolt hole on the passenger side. I was told to remove the bolt and coat it with permatex hi tack gasket sealer and reinstall it. Any how I'm wondering why there would be a leak there in the first place, any ideas?
my first response is, you used a wrong gasket or you mucked up the gasket when you installed it. Then i think of maybe the water pump casting cracked when you tightened the bolt. ( but not likely) . I guess you could try the sealer thing. but you could test it to see if it leaking from under the bolt head. The way you could do that is put a soft washer , like copper washer under the bolt head and put the bolt back in. the soft copper washer will make a water tight seal. if it were me , i would remove the pump and find out what the hay is wrong . i have replaced at least 6 water pumps on my own chevys, and have never had that problem.
