I recently had an oil leak from the back of my intake manifold. I’ve got a 78 with a 351m and an Edelbrock performer 400 intake. So I changed the valley pan, used RTV as recommended instead of the rubber gaskets, put it all together and had a coolant leak from the back of the intake. I took the intake back off and saw some coolant pooled under the valley pan as well. I think I may have messed up when torquing the bolts and over-torqued the very first one. I followed the pattern on the Edelbrock instructions. My questions is, could over torquing the first bolt cause this issue with the coolant leaking internally and externally or should I be looking at something else?