Vacuum system diagram

Talk about the E-Type Series 3

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ianb
Posts: 1
Joined: Mon Jan 22, 2024 3:56 pm
Isle of Man

#1 Vacuum system diagram

Post by ianb » Tue May 12, 2026 4:11 pm

Hi,
I have a E-Type S3 V12 manual, just finishing a rebuild and desperately need a diagram of the small vacuum hoses that run from the thermo switch to the carbs, intake manifold, distributor etc. any help would be greatly appreciated.
Thank you

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lowact
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Location: Canberra, Australia
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#2 Re: Vacuum system diagram

Post by lowact » Wed May 13, 2026 1:57 pm

There are 5 versions of the thermostatic vacuum system illustrated in the spare parts manual. This copy is in the "E-type Knowledge Base" on this forum:
https://www.dropbox.com/s/xoy273abhzmg1 ... l.pdf?dl=1
Regards,
ColinL
'72 OTS manual V12

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Craig Balzer
Posts: 90
Joined: Fri Mar 03, 2017 2:02 am
United States of America

#3 Re: Vacuum system diagram

Post by Craig Balzer » Wed May 13, 2026 6:11 pm

as colin stated, there are 5 versions of the plumbing for the thermostatic vacuum system.

This photo is of the version that is appropriate for my 72 S3 (UC 1S20954 with engine number 7S7765 SB). Note the post-it that IDs the letter identifiers on the thermostatic vacuum valve. I assume it to be the same of all variations of the thermostatic vacuum system.

Hope this helps

Image
Craig Balzer
Colorado Springs, CO, USA
1972 Series III OTS, 4-Speed (soon-to-be a Guy Broad 5-Speed), A/C, CWW

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