Bordos
Member
Hello,
At the beginning - I looked trough almost all threads related to TDI rattle/noise etc. and when applicable I did things other used do - without any effect...
My 2005 1.4 TDI BHC Audi A2 is very stubborn with a rattle like noise coming from the engine bay - although I am trying to trace its source I was not able to do so.
This noise occurs between 1500-1900 rpm, it sound does not seem to be related with engine speed (it just occurs and then above 1900 rpm or below 1500 its gone). Its not always present, but it seem to be more frequent when it is cold. Its present regardless of clutch status (on/off). It is like this for about 2 years now.
What is important: the car is running normally, no "Check engine", no fault codes, it has its power, etc. Everything is perfectly fine aside from that noise...
What did I do trying solve it:
1. Replaced timing belt set (with all rollers etc.) - no effect,
2. Replaced oil pump chain set (including the tensioner, sprockets, new bolts etc.) - no effect,
3. Replaced auxiliary belt with its tensioner - no effect,
4. Replaced alternator pulley - no effect,
5. Replaced "dog bone" (bottom engine bracket) - no effect,
6. Checked all noise covers around the exhaust for a loose one - all are solid,
7. Checked engine lifting eyes (saw a thread here that those can get loose) - all are solid,
8. Got under the car with a friend reving the engine so that the noise is present - it is very hard to distinguish it from below the car (this engine is not very "silent") but it seem that it can be heard from between the engine back and cars body).
9. Looked around the fuel line with the noise silencers (also found a thread here that similar noises can came from fuel lines) - this does not look bad in any way.
10. Looked at two remaining engine mounts - both look stiff.
Does any of you have any other ideas where to look for the source of this noise ? I really need to trace it as I am loosing my confidence about this car...
At the beginning - I looked trough almost all threads related to TDI rattle/noise etc. and when applicable I did things other used do - without any effect...
My 2005 1.4 TDI BHC Audi A2 is very stubborn with a rattle like noise coming from the engine bay - although I am trying to trace its source I was not able to do so.
This noise occurs between 1500-1900 rpm, it sound does not seem to be related with engine speed (it just occurs and then above 1900 rpm or below 1500 its gone). Its not always present, but it seem to be more frequent when it is cold. Its present regardless of clutch status (on/off). It is like this for about 2 years now.
What is important: the car is running normally, no "Check engine", no fault codes, it has its power, etc. Everything is perfectly fine aside from that noise...
What did I do trying solve it:
1. Replaced timing belt set (with all rollers etc.) - no effect,
2. Replaced oil pump chain set (including the tensioner, sprockets, new bolts etc.) - no effect,
3. Replaced auxiliary belt with its tensioner - no effect,
4. Replaced alternator pulley - no effect,
5. Replaced "dog bone" (bottom engine bracket) - no effect,
6. Checked all noise covers around the exhaust for a loose one - all are solid,
7. Checked engine lifting eyes (saw a thread here that those can get loose) - all are solid,
8. Got under the car with a friend reving the engine so that the noise is present - it is very hard to distinguish it from below the car (this engine is not very "silent") but it seem that it can be heard from between the engine back and cars body).
9. Looked around the fuel line with the noise silencers (also found a thread here that similar noises can came from fuel lines) - this does not look bad in any way.
10. Looked at two remaining engine mounts - both look stiff.
Does any of you have any other ideas where to look for the source of this noise ? I really need to trace it as I am loosing my confidence about this car...