Hi All - I have put in, and taken off my intake manifold three times because of my intake gasket not sealing right on my 304. This last time I thought I had it right, until a few weeks later, I was checking around the rear of the engine with a mirror, and at the rear of the intake, next to the firewall... I noticed that the rear rubber gasket had slid off the ridge of the block it was supposed to set on.
The corners of the manifold looked sealed up ok, there are no fluid leaks coming out where the rubber had slid off in the center of the engine block... I have ran the engine some, and it runs ok, but it is a bit hard starting. I have to pump the gas quite a bit to get it to fire. Plus, to run it with the choke full open, it has to be at full operating temp.
My question is that I really don't want to take this damn thing apart again. But, I was wondering if that part of the rubber gasket being "off" would it effect the way my engine is running? I mean, the void directly under the manifold, oil splashes around in there to lube the lifters and push rods. No oil is leaking out. The intake tunnels and exhaust passeges are sealed at the heads, right?
So I was thinking that I could seal it up where the rubber sets with some silicone? And everything could be ok?? Thanks for any advice...