I have a 1995 integra ls. I bought a b18b1 from the junkyard that had a blown head gasket and busted water pump. My friend replaced the head gasket and water pump and adjusted the valves, put it in time etc. Anyways the problem is that at idle at a stop light for example, some sort of smoke comes from the engine bay into the cabin. It isn't burning oil and isn't running hot, temp gauge is 1/4 as normal. I opened the hood to see where the smoke is coming from and it seems to come from under the throttle body somewhere. We also replaced the valve cover gasket. No oil is leaking from those spots and the smoke is gray I think I recall. I have not overheated it and make sure all fluids are topped off every day before I leave home so I am baffled by this.