Any chance of recording the noise and posting up here, assuming it can be done safely? Record a video on your phone and upload to YouTube for us to listen to? You may well get more accurate advice by doing so.
Had exactly same problem with my factory built 420r which I received in January , took it straight back ,turned out to be an unsecured handbrake cable hitting against the tunnel,hope yours is a simple as fix
Time to put the kettle on...
Was it running normally before that?
Any recent work?
Where is it now?
Jonathan
NB: Posted as a blog on 13 April:
https://www.caterhamlotus7.club/blogs/clonking-rear-420-r
Nut and bolt check everything to ensure nothing come loose.
Check for play in wheel bearings, driveshaft joints, prop shaft joints.
Report back findings.
First thing I would check are the A frame bolts to the dedion tube.
Any chance of recording the noise and posting up here, assuming it can be done safely? Record a video on your phone and upload to YouTube for us to listen to? You may well get more accurate advice by doing so.
For what it's worth I agree with #4, check all joints for play, then check wishbone/A-frame/diff bolts are tight.
Yes, check all those mounting fasteners. Also make sure there's a decent preload on diff still but I would think more likely fasteners somewhere.
You say in the blog post (#3) "just purchased". Was that with a warranty? If so, it would be prudent to explore that.
JV
Had exactly same problem with my factory built 420r which I received in January , took it straight back ,turned out to be an unsecured handbrake cable hitting against the tunnel,hope yours is a simple as fix
I had that on my year 2000 K, terrible noise, and it was the diff bolts, couple of minutes to tighten them.
Search Club Site Search Techtalk