Hello all. My '98 Silverado (5 liter, V-8, 142k miles) is leaking a small amount of antifreeze at the intake manifold. I'm pretty sure I have some oil showing up on my radiator, too - or it realy needs to be flushed. I'm a pretty good weekend mechanic, but this will be getting into something I've never done. It sounds easy enough - get everything out of the way, remove probably 6 or 8 bolts that hold the intake manifold on the engine, get the old gasket off and clean that surface, install new gasket and use a torque wrench to reinstall intake manifold. Suggestions? Am I on the right track? Hopefully I don't also have to remove valve covers or anything else? I didn't see any threads here addressing this, but I am wiling to do plenty of research before I began rather than screw something up. Other thing I'm wondering about is: products on the market, i.e., "Thermagasket" and others. I'm concerned that although these products might fix my leak, isn't there a good possibility that they'll gum-up other parts like maybe my water pump? Thanks for your help.