Intake Manifold O-rings

The grease is white lithium grease. Don't glob it on just coat it. The rubber socket (your rubber flange) where the carbs mount into has an "O" ring between the socket and the metal intake where it mounts. Then the metal air intake tube on top of the cylinders each have an "O" ring.At the five year rubber change the carb sockets get replaced along with its "O" ring. If you need to loosen the metal intake for some reason the "O" rings can be reused, but if you  have a quite a few hours or a lot of time since it the engine MFG then replace the metal intake "O" rings too. If you remove the metal air intake manifold make absolutely sure you do not drop anything down inside. 

Yea, makes perfect sense. Thanks.