Have a look at this hole !
Posted: Fri Nov 03, 2006 9:00 am
for the sparkplugs on my 2.5 L
In my neverending quest to better understand the minds of Italian automotive engineers I just need to know - what purpose do the grooves in the spark plug tube serve ? I have two different types of cam covers,one has the grooves one doesn't ?

In my neverending quest to better understand the minds of Italian automotive engineers I just need to know - what purpose do the grooves in the spark plug tube serve ? I have two different types of cam covers,one has the grooves one doesn't ?