Headlamp Vacuum Valve
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They usually have an arrow on them but if you want to be 100% sure pull the rubber hose off the Inlet and suck the pipe..... if you can draw air through it then it's the correct way round but if it locks up and opens when blown down the hose then obviously it's the wrong way round. If it works both sucking and blowing then it's faulty.
Chris
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Grizzly - Coveted Fifth Gear
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Where did you find a brass vacuum valve? Here in the US they are all plastic and can't be installed in the engine bay as they might melt.
Glen
05 Elise - Back where I started
65 Elan S2 - 26/4055
72 Europa - 74/2358R
69 Elan S4 - 45/7941
64 Elan S1 - 26/0379
12 Colin 30 - Lotus Racing Kart
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05 Elise - Back where I started
65 Elan S2 - 26/4055
72 Europa - 74/2358R
69 Elan S4 - 45/7941
64 Elan S1 - 26/0379
12 Colin 30 - Lotus Racing Kart
07 Exige S - Wicked Road/Track Car
07 Exige S - Fast Road/Track Car
06 Elise - Track pack
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Certified Lotus - Coveted Fifth Gear
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I purchased a one way valve a few years ago from a known parts dealer in Crediton, and was sent a Norgren brass part that looks just like the one on the photo
http://store.norgren.com/uk/en/list/val ... urn-valves
http://cdn.norgren.com/pdf/en_5_10_370_S_52x_S_531.pdf
it does not look original, but has worked fine so far (during installation I made sure of correct operation by blowing/sucking through it so that air would go towards the manifold only, from the vacuum tank which is to hold a reserve of vacuum).
http://store.norgren.com/uk/en/list/val ... urn-valves
http://cdn.norgren.com/pdf/en_5_10_370_S_52x_S_531.pdf
it does not look original, but has worked fine so far (during installation I made sure of correct operation by blowing/sucking through it so that air would go towards the manifold only, from the vacuum tank which is to hold a reserve of vacuum).
S4SE 36/8198
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nmauduit - Coveted Fifth Gear
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Thanks!
Glen
05 Elise - Back where I started
65 Elan S2 - 26/4055
72 Europa - 74/2358R
69 Elan S4 - 45/7941
64 Elan S1 - 26/0379
12 Colin 30 - Lotus Racing Kart
07 Exige S - Wicked Road/Track Car
07 Exige S - Fast Road/Track Car
06 Elise - Track pack
05 Elise - Back where I started
65 Elan S2 - 26/4055
72 Europa - 74/2358R
69 Elan S4 - 45/7941
64 Elan S1 - 26/0379
12 Colin 30 - Lotus Racing Kart
07 Exige S - Wicked Road/Track Car
07 Exige S - Fast Road/Track Car
06 Elise - Track pack
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Certified Lotus - Coveted Fifth Gear
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I would be a bit careful with those non return valves.
My car came with them when i bought it and
they look very much like yours and they were not intended for use in a car.
The rubber seals "melted" after a while.
I think the petrol fumes dissolved them.
Just my experience.
Jens
My car came with them when i bought it and
they look very much like yours and they were not intended for use in a car.
The rubber seals "melted" after a while.
I think the petrol fumes dissolved them.
Just my experience.
Jens
- Daugaard
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Daugaard wrote:I would be a bit careful with those non return valves.
My car came with them when i bought it and
they look very much like yours and they were not intended for use in a car.
The rubber seals "melted" after a while.
I think the petrol fumes dissolved them.
Just my experience.
Jens
that model seems to have a nitrile seal, and if installed correctly it should get mostly air (vacuum drawn from manifold, then air coming from behind the dash)... I'll check if I can get an original one working at some point, but have postponed that as non urgent so far...
nb: I have installed mine almost like the one on the photo above, that is thermally (and vibrations) isolated from the head (was a bit suspicious myself upon receiving it, so opted for a non original yet safer installation location)...
S4SE 36/8198
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nmauduit - Coveted Fifth Gear
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I was supplied one by Fibreglass Services, unmarked, and it has jammed shut at least once and I no longer trust it. I hope to fit a T-piece with built-in valve, which I believe Sue Miller still sells, as the original lasted 30 years.
Meg
26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
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26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
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Quart Meg Miles - Coveted Fifth Gear
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