This pattern of sealant will keep the crankcase sealed, and each journal isolated, and will allow oil on the 8 middle intake manifold bolt threads (which pass through the head bosses back into the valley) to drain back into the valley. The 4 corner bolts are exposed to the outside, and NOT sealed to the coolant journal, and they're painted, so they shouldn't corrode.

Mahle/Victor MS15202W

Owner caption April 2015 · Photo 271 of 434