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What is this part of my carburetor

Tiny
DUMINDU MAHAWELA
  • MEMBER
  • 1987 TOYOTA TERCEL
  • 1.5L
  • 4 CYL
  • 4WD
  • MANUAL
  • 100,000 MILES
I have removed the carburetor of my car. Its a Aisan 14120 carburetor. My car is a 1452cc 2bl manual driven car.

I know the functions off all the components instead of this shown circled in the following picture.

Can tell me What is this part and what is the function of it?
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Sunday, July 30th, 2017 AT 3:58 AM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See diagram of Asian carburetor two barrel it may be just the way it was cast. Or if a single barrel carburetor may be part that goes to compensator for choke. See pictures.
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Sunday, July 30th, 2017 AT 8:33 AM
Tiny
DUMINDU MAHAWELA
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  • 4 POSTS
Thanks. It is a two barrel carburetor. That part has a one orifice for the secondary barrel throat. Inside this small chamber, there is a plate like valve. Other end goes to the intake manifold. This part not found in above manuals.

I added some more pictures. It lies in the direction of the arrow in top view.
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Sunday, July 30th, 2017 AT 10:17 AM
Tiny
HMAC300
  • MECHANIC
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It has to be a vacuum port for the secondary diaphragm which makes the second throttle plate open if it leaks vacuum it will not work from the pictures an diagrams that have been sent.
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Sunday, July 30th, 2017 AT 2:06 PM
Tiny
DUMINDU MAHAWELA
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Thanks "HMAC300" for continues help.

This carburetor has a secondary throttle diaphragm. It connects to a place, where 90 degrees counter-clockwise to this. (As in the following photo)
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Sunday, July 30th, 2017 AT 5:56 PM
Tiny
HMAC300
  • MECHANIC
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As far as I can tell that is what the last reply said is the area you were questioning.
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Sunday, July 30th, 2017 AT 6:16 PM
Tiny
DUMINDU MAHAWELA
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After Googling for long period, I found this as a place for thermostatic valve. Unfortunately that thermostatic valve has been removed by the previous user and added a valve like plate.

Now that valve production is discontinued. So will never able to use this part.
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Monday, July 31st, 2017 AT 4:46 AM
Tiny
HMAC300
  • MECHANIC
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You might find one in a junkyard if you are lucky. Next time please set carburetor as it sits on vehicle for easier id for us.
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Monday, July 31st, 2017 AT 6:17 AM

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