PacCoastFwy923
Veteran Member
- Joined
- Feb 21, 2008
- Location
- Oakland
- TDI
- 2015 Passat SE TDI 6-speed manual; 2006 mkV Jetta TDI / 5-speed / Pkg 2
Ok, the trouble with doing (simple) maintenance on the car with you lot for help is a lot of in-and-out with greasy hands and no patience to search for answers.
So I think I found part of what I was looking for, but it's too late 'cause I took the pictures already.
First two pictures: is this the "prefilter" I see some of you writing about (the dirty fuzzy layer on the old filter on the left). If so, it appears I can continue using the pink filter on the right here in the mild SF bay area, yes?
Good...
New filter 1K0 129 620D on the left and 620E on the right.
No pre-filter vs. pre-filter?
Next question...
What's up with this air filter bypass? And why is it open?
It appears that vacuum should close it, maybe? It also appears that it feeds something other than the engine?
BUT... it also looks as though it can feed the engine air, as well: through the bypass and up, and it goes right into the port with all the filtered air.
So what the purpose and the operation behind this crafty device?
So I think I found part of what I was looking for, but it's too late 'cause I took the pictures already.
First two pictures: is this the "prefilter" I see some of you writing about (the dirty fuzzy layer on the old filter on the left). If so, it appears I can continue using the pink filter on the right here in the mild SF bay area, yes?
Good...
New filter 1K0 129 620D on the left and 620E on the right.
No pre-filter vs. pre-filter?
Next question...
What's up with this air filter bypass? And why is it open?
It appears that vacuum should close it, maybe? It also appears that it feeds something other than the engine?
BUT... it also looks as though it can feed the engine air, as well: through the bypass and up, and it goes right into the port with all the filtered air.
So what the purpose and the operation behind this crafty device?