scheides
01-25-2010, 11:12 PM
So these first-gen direct-injection (FSI) motors have this cam lobe on the end of the camshaft with 3 bumps on it, that drive a the mechanical FSI fuel pump mounted on top of the motor. I couldn't believe my eyes when I saw the retarded design, its a flat piston. The later models (2008+ I think) have a more logical roller-style cam follower, rather than this stupid flat design.
After seeing all of the nasty nasty pics online, I got worried and just HAD to yank the FSI pump for a look. I ordered up a new follower just in case and swapped in new spark plugs at the same time (was due around 60k anyways). I went with 1-range colder plugs from NKG.
Here's an EXAMPLE pics of a cam follower gone wrong. MOST of these are on cars with upgraded FSI pumps, which tend to put extra wear on these things (and sometimes eat through teh cam!) Completely worn through, and cam is effed:
http://i283.photobucket.com/albums/kk290/crx4luke/IMG_4531.jpg
On to the pics, old vs new:
http://imgur.com/4GW53.jpg
http://imgur.com/GGnrw.jpg
http://imgur.com/gVR4O.jpg
Aweful pic of the cam lobe. It looked good, some very light scratches, but they could just have been from me sticking my finger in there (just oil marks).
http://imgur.com/k8kxp.jpg
And finally, I wipped off the vacuum pump (goes where the CAS is on our 4G63's, crazyness!) to see what cam this thing has in it. Yippee! It's the Revision B two-piece cam. Note the second piece of metal surrounding the main cam core. This is an extra-hard piece (or something) that is also replaceable (if it gets damaged):
http://imgur.com/hiOY0.jpg
I went ahead and replaced the follower. The coating was pretty much worn away, but it was very smooth. PITA swap on this car, it has all hardlines going to the pump.
Special thanks to these threads:
http://forums.vwvortex.com/zerothread?id=3750088
http://www.golfmkv.com/forums/showthread.php?t=44321
After seeing all of the nasty nasty pics online, I got worried and just HAD to yank the FSI pump for a look. I ordered up a new follower just in case and swapped in new spark plugs at the same time (was due around 60k anyways). I went with 1-range colder plugs from NKG.
Here's an EXAMPLE pics of a cam follower gone wrong. MOST of these are on cars with upgraded FSI pumps, which tend to put extra wear on these things (and sometimes eat through teh cam!) Completely worn through, and cam is effed:
http://i283.photobucket.com/albums/kk290/crx4luke/IMG_4531.jpg
On to the pics, old vs new:
http://imgur.com/4GW53.jpg
http://imgur.com/GGnrw.jpg
http://imgur.com/gVR4O.jpg
Aweful pic of the cam lobe. It looked good, some very light scratches, but they could just have been from me sticking my finger in there (just oil marks).
http://imgur.com/k8kxp.jpg
And finally, I wipped off the vacuum pump (goes where the CAS is on our 4G63's, crazyness!) to see what cam this thing has in it. Yippee! It's the Revision B two-piece cam. Note the second piece of metal surrounding the main cam core. This is an extra-hard piece (or something) that is also replaceable (if it gets damaged):
http://imgur.com/hiOY0.jpg
I went ahead and replaced the follower. The coating was pretty much worn away, but it was very smooth. PITA swap on this car, it has all hardlines going to the pump.
Special thanks to these threads:
http://forums.vwvortex.com/zerothread?id=3750088
http://www.golfmkv.com/forums/showthread.php?t=44321