Car: 2006 Audi A4 2.0T FSI
Problem I am having:
Drove the car to the store, no weird noises car drove fine. Leave store 30 minutes later and a few blocks away I hear the engine making weird noises. Almost sounded like a rattling/loose heat shield, with revving the engine to 2,000 rpm made sound go away. When I got off the highway the noise was worrying me again. Pretty bad sounding, but I figured if I made it this far it was best to just get it home. No check engine/MIL light. Get home scan the car, have a soft code for P0016. Clear the code. Start it again and I am getting a loud rattling from what seems to be the cam chain cover on the back of the motor. This is the video I took at that time. (https://www.youtube.com/watch?v=xXFHV4F1rVE). Revved the motor a couple of times and kept the RPM's steady above 2,000-2,500rpm and the sound seems to go away. This time I get a check engine light. Scan the car again and get 1 code on a full scan relating to the engine.
I have gotten the P0016 code a few times over the past year, clearing it wouldn't have it resurface for months at a time. I decided to go ahead and buy a new cam chain tensioner, chain, cam follower, and tools fearing that the tensioner may have had enough and probably was destroyed. Finally got around to working on the car tonight. Got everything off and to my surprise the tensioner did not look bad at all, chain looked fine too. I did have a tough time aligning the tool between the two cams to lock them so I can remove the polydrive bolt holding the cam adjuster on. It was a tight fit and removing it I had to rotate the exhaust cam slightly to get the tool free. With the motor at TDC the intake cam adjustment slots point straight up and down 12o'clock position while the exhaust cam adjustment slots are rotated to about 2-3 o'clock position. Replaced the tensioner, chain, cam follower, cam tensioner case gasket, valve cover gasket, replaced the three seals on the cam adjuster that is part of the cam chain cover (stock seals were fine) and the polydrive bolt. Did not notice anything on the oil passage screen on the old tensioner. Cam follower looked pretty good too. The only time this side of the motor was opened was when I had my intake cam replaced from Audi under the extended warranty around 110K miles, car now has 195K miles.
Once I got the car all back together after replacing all the parts, started it, slight noise for the first 2-3 seconds until oil got to the cylinder head I'm assuming, then the sound went away. Ok great that solved my problem. Then once the engine RPM dropped back down after the cold start the noise came right back. I am lost as to what it may be. Something tells me it could possibly be the cam chain adjuster, or the cam adjuster control valve (n205), but I am not 100% certain that either of those would cause this kind of noise. Judging by the fact my cams do seem as they are somewhat out of sync with each other because of the trouble I had installing the tool is it possible the chain jumped a tooth?
Problem I am having:
Drove the car to the store, no weird noises car drove fine. Leave store 30 minutes later and a few blocks away I hear the engine making weird noises. Almost sounded like a rattling/loose heat shield, with revving the engine to 2,000 rpm made sound go away. When I got off the highway the noise was worrying me again. Pretty bad sounding, but I figured if I made it this far it was best to just get it home. No check engine/MIL light. Get home scan the car, have a soft code for P0016. Clear the code. Start it again and I am getting a loud rattling from what seems to be the cam chain cover on the back of the motor. This is the video I took at that time. (https://www.youtube.com/watch?v=xXFHV4F1rVE). Revved the motor a couple of times and kept the RPM's steady above 2,000-2,500rpm and the sound seems to go away. This time I get a check engine light. Scan the car again and get 1 code on a full scan relating to the engine.
I have gotten the P0016 code a few times over the past year, clearing it wouldn't have it resurface for months at a time. I decided to go ahead and buy a new cam chain tensioner, chain, cam follower, and tools fearing that the tensioner may have had enough and probably was destroyed. Finally got around to working on the car tonight. Got everything off and to my surprise the tensioner did not look bad at all, chain looked fine too. I did have a tough time aligning the tool between the two cams to lock them so I can remove the polydrive bolt holding the cam adjuster on. It was a tight fit and removing it I had to rotate the exhaust cam slightly to get the tool free. With the motor at TDC the intake cam adjustment slots point straight up and down 12o'clock position while the exhaust cam adjustment slots are rotated to about 2-3 o'clock position. Replaced the tensioner, chain, cam follower, cam tensioner case gasket, valve cover gasket, replaced the three seals on the cam adjuster that is part of the cam chain cover (stock seals were fine) and the polydrive bolt. Did not notice anything on the oil passage screen on the old tensioner. Cam follower looked pretty good too. The only time this side of the motor was opened was when I had my intake cam replaced from Audi under the extended warranty around 110K miles, car now has 195K miles.
Once I got the car all back together after replacing all the parts, started it, slight noise for the first 2-3 seconds until oil got to the cylinder head I'm assuming, then the sound went away. Ok great that solved my problem. Then once the engine RPM dropped back down after the cold start the noise came right back. I am lost as to what it may be. Something tells me it could possibly be the cam chain adjuster, or the cam adjuster control valve (n205), but I am not 100% certain that either of those would cause this kind of noise. Judging by the fact my cams do seem as they are somewhat out of sync with each other because of the trouble I had installing the tool is it possible the chain jumped a tooth?