When I put my new factory style pump in my 440 Source housing I put aviation sealer (baby poop)on the bolts before I installed them. My pump started leaking around the water pump to housing bolts today what do you guys use fo sealer on the bolts? silicone or ????

Might use some permatex #1 that comes in a small tube. It is viscous and dries hard. Clean the bolt holes, the bolts and let it set up overnight. this area is rarely a problem so check the fit of the bolts into the threads dry ahead of time & see if they feel tight & if so goop em up & install. The thread fit concerns me more than the type of gasket cement

After looking at the bolts it doesn't look like the baby poop dried completely it was still tacky when I took the bolts out I wonder if the jar went bad it was pretty old. the pumps been in for about 2 weeks but I only drove the car twice since it's been in and not for very long each time. The pump I took out never leaked at the bolts and used the same bolts so I don't think it's the threads in the housing. I will try the permatex #1 in the morning unless you can think of something that will dry faster I want to drive the car tomorrow.

Same housing same 4 bolts just a new WP itself? yes goop em up w something thick, I'd drain some of the coolant clean the holes/bolts w some starting fluid (it flashes off in seconds), use the Permatex #1 and fire it up.

Just use some liquid teflon.Ive never had a leak using it.Rocky