Technical What's this valve?

[Hellcat]

Part 12 - on the Lancia Delta there are 2 pipes from the idle valve to the intake... one with a valve and one without. Is it a non-return valve to aid idle, pickup from idle, or transition onto idle?

On Tipo diagram Part 11. Doesn't seem to be attached to anything, don't even know if my Tipo has one.

 

[svcglobal]

That's not really a valve, its a felt filter in order to prevent oil fumes to clog the idle valve. So, instead to do the clean the valve task, you do replace the filter.

See the Google translated page with better explanation here:

http://translate.google.com.br/tran...lient=firefox-a&sl=de&tl=en&hl=pt-BR&ie=UTF-8

 

[Hellcat]

Ah a filter, eper as accurate as usual

Cheaper to clean the idle valve out once every now and then - or remove it!