fungus
Saturday 21st March 2009, 21:19
Hi there, I wonder if anyone can shed any light or offer any suggestions. I have a 2001 C70 coupe which has developed an intermittent knocking noise. I am not mechanically minded and the only other info I can provide is:
1. it seems to happen when I am on the motorway
2. the car starts to handle as if I am driving on rumble strips
3. if I put the car into neutral (on the motorway) the knocking noise continues but only when the car is moving. If I stop and the car is running idle the noise stops.
4. there is a burning smell when it happens (a rubber or plastic smell) but the engine temp is fine.
5. it has never happened on small journies around town.
to summarise, it feels like the tracking is out in how the car handles but the knocking noise is concerning. Performance appears unaffected and if I am doing 90 and it starts to knock and I slow down to 60, or even 30, the knocking continues.
I would really appreciate any opinions or suggestions. The main issue is that it is intermittant and very annoying!
Thanks in advance
Simon.
1. it seems to happen when I am on the motorway
2. the car starts to handle as if I am driving on rumble strips
3. if I put the car into neutral (on the motorway) the knocking noise continues but only when the car is moving. If I stop and the car is running idle the noise stops.
4. there is a burning smell when it happens (a rubber or plastic smell) but the engine temp is fine.
5. it has never happened on small journies around town.
to summarise, it feels like the tracking is out in how the car handles but the knocking noise is concerning. Performance appears unaffected and if I am doing 90 and it starts to knock and I slow down to 60, or even 30, the knocking continues.
I would really appreciate any opinions or suggestions. The main issue is that it is intermittant and very annoying!
Thanks in advance
Simon.