Posted By: 6PAX
Valley pan question - 05/18/23 05:36 PM
I'm in the process of installing my intake manifold (new Performer RPM on new Performer RPM heads on a 400 block) and have a question about the valley pan and gaskets. According to the instructions Edelbrock provided, I should use the 4 gaskets along with the valley pan. I tested the fit by first setting the manifold on the motor without the valley pan and checked for bolt hole alignment. They looked perfect. I also checked fit with a feeler gauge and I can get a .005 gauge to slide in there and when I go to a .006 it will not fit in the middle but slides in with some drag on the ends.With just the pan and the manifold sitting on it they still look good. I then put the valley pan and a gasket between it and the head and set the manifold back on. The holes in the head are now at the bottom of the holes in the manifold. I didn't try adding the gasket between the pan and manifold being the hole alignment was already off with just the gasket between the pan and heads. So, it looks like I will have to skip the gaskets but was just wondering if anyone else has had this problem when trying to use the gaskets.