This stumped me when I was doing my lower intake gaskets. Check out intake runner #1:
To me, that looks like runner #1 has been sucking down coolant. But that doesn't make any sense to me, seeing as i've never seen nor heard of a S1 upper plenum leaking coolant. So the question I pose to you is: what the heck is with the color and lack of carbon in runner #1??
One thing to throw into the mix, the throttle body looked like it had been swallowing a lot of oil, which i can only assume came from possible over-oiling of my K&N.
So if I had been ingesting large quantities of K&N filter oil, and for some reason it was going into only
cylinder #1 runner, shouldn't that cause excessive
carbon versus no
carbon?? Hence the reason I do not believe that over-oiling can be attributed to this lower intake. So why the strange intake runner???