Looking for Lower intake manifold for 3800 Series II (Page 1/1) Thepiclink OCT 30, 01:08 AM So i recently discovered that my olds 88 has a slight water leak issue, and major oil leak around the intake manifold. I would like to find a replacement for it before i get the gasket set as i have noticed that some can become corroded around the water Jackets. So if anyone has one sitting around and is willing to sell let me know. Oh and before i forget it is for the no sc model. Thanks in advance!