Temperature Sensor Unit?

JaggyWag · Post by **JaggyWag** » Wed Mar 25, 2015 1:24 pm

I was wondering if anyone knows the exact function of the temperature sensor unit that lives in the vacuum pipes on the V12 air filter, please? Seems like it might be a warm up device concerning warm or cold air from the manifold?

They are discontinued, but I am missing one so I wondered about a work-around? Part number is C38357 but they were about ?13 when available. Somebody has a 'new old stock' one on a well-known auction site for a rather eye-watering ?75!

Many thanks

Peter

Mountain King · Post by **Mountain King** » Wed Mar 25, 2015 2:20 pm

http://www.british-oldtimerparts.de/Ste ... :1087.html

I bought two from SNG late last year, they say not available, but they were...

The thermo switch controls the vacuum servo (round disk like thing about 10mm thick and 65mm in diameter and attached to the front end of the filter box) which actuates the flap inside the front of the filter box. This allows hot air from around the exhaust manifold to enter the filter box via C34351 (hot air intake) rather than just cold air from the trumpets.

It should improve cold weather running until the engine is fully warmed up.

Many people have blocked these vacuum tubes off, but importantly you should, if you don't have the thermo switch, also block the two small pipes protruding from the middle of the filter box that the switch is normally attached to. Otherwise you could run the risk of unfiltered air and grit getting sucked into the carbs and beyond.

cheers

Andy

JaggyWag · Post by **JaggyWag** » Wed Mar 25, 2015 4:02 pm

Thanks very much indeed Andy, that's really very helpful, also for taking the trouble to post the link - it was SNGB who told me these were not available any more but I will now persevere!

JaggyWag · Post by **JaggyWag** » Wed Mar 25, 2015 4:34 pm

SNG do indeed have these on the shelf - problem with their listing which has now been rectified just in case anybody else wants one....!

Thanks again Andy - without your help I would have been stuck as a Google search on the part number had not yielded!

Mountain King · Post by **Mountain King** » Wed Mar 25, 2015 4:38 pm

A pleasure,

the German company does sell them but at 90euro a pair quite expensive!!

cheers

Link:
BBcode:
HTML:
	Hide post links

Link:
BBcode:
HTML:
	Hide post links

Link:
BBcode:
HTML:
	Hide post links

Link:
BBcode:
HTML:
	Hide post links

Link:
BBcode:
HTML:
	Hide post links

The 'E' Type Forum

Temperature Sensor Unit?

#1 Temperature Sensor Unit?

#2

#3

#4

#5