I have a small coolant leak directly under where the air intake connects to the throttle body. Is this the “water bypass”? What is leaking? Is it one gasket or two and maybe an o-ring? How do I remove it? What needs to come off to take this part off? Couldn’t find anything via search on here, just found about the rear leaking on search. Part #s I will need etc ? Thanks.

 

Tough to see from the pics but it looks like the thermostat housing (16323) or one of the small hoses connected to it. Remove the intake tube at the throttle body for a better view. Usually, coolant leaks are apparent as evidenced by the crusty red residue but this is an area where coolant can be sprayed elsewhere from the spinning pulleys and belt.

 

Is 16355 a common leak area? It seems to be that piece.
is 16355 removable without taking the intake off?

 

I cleaned all the residue off and will drive it for a few days, then remove the tube and hopefully can pinpoint the leak.