What causes rod chucking and headgasket blowing?

[Flynn]

I want to get the right answer and Midnightclub is clearly wrong. It is their pityful intellect that perceives an intelligent and well directed question as an aggressive gesture**.

How is he wrong??

**btw I have corrected your spelling for you that your "superior intellect" neglected to spell correctly

Implying that rods go when the engines aren't underload. Also implying that airflow increases cylinder pressure when it is actually better to have more airflow at lower psi which will lead to lower cylinder pressures. Higher boost pressure means higher cylinder pressure and intake temperatures which strain both the rods and head gasket respectively.