Analytics Made Easy - Statcounter
520Y - Continued - Page 4 - Projects & Restorations - The Lotus Forums - Official Lotus Community Partner Jump to content


520Y - Continued

Recommended Posts

Hello Richard. Usually in the Esprit fora I just today browsed your thread for the first time, and it's a commendable account. Regarding the engine knock I immediately expected what was to be your report, as big end failures and track time have been well associated in my observations. The 900 series engine has 2 key aspects relevant to this - the high rev operating range and the 45 deg slant installation. The revs situation assures high rate of pumping oil, including to the head, the slant position neutralises gravity return of oil to sump when nearing 1 G turns to the right. That said I am similarly inclined to track day joys and thorough restoration of these great motor cars. Well done!


  • Like 1
  • Sad 1
Link to comment
Share on other sites

Upgrade today to remove Google ads and support TLF.

Thanks for the comments Steve. a very interesting car you have there, and some great views of Goodwood!

On my test drives Ive noticed that the aerial on the car roof has gone floppy - it was lying on the roof and would not sit any higher. I decided to investigate and thought the most likely was the the bolt or whatever forms the hinge had worked loose. On the assumption it was a bolt I decided to try to drill it out - since there seemed no way to undo it.

I attacked what I hoped was a cover plate with a left handed drill - it turned out this was actually the bolt head, but the left handed bits had the desired effect and after a while the bolt came undone.


The construction is that the two parts of the aerial have serrated  bevels, and the bolt has a spring that keeps the two parts pressed together, but allows enough movement to lift the aerial. Neither the bolt or the nut have any way to use a spanner on them, although it looks like someone has cut a screwdriver slot into my nut.


Having taken the aerial apart I decided to replace the bolt with a stainless cap head bolt, but reuse the original spring and nut.


Once all together I also decided to put a new nyloc on the end of the bolt rather than just cut it off. This is probably oveerkill, and once painted black if it stands out too much I will probably remove it.


  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our traffic. By clicking " I Accept ", you consent to our use of cookies. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.