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Injection Port Tube. What Are These?

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#1 psyb0rg

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Posted 01 February 2019 - 05:10 AM

I just got a valve job done on my Canadian Mini 1000's head. The machine shop removed these brass tubes from where the smog/air pump air rail connects to the head. These seem to be a Canadian-only part. They are number 12 on the image here: http://www.somerford...age=page&id=116

 

jWXSNFD.jpg

 

 

This is where the air pump rail attaches:

ekh1glB.jpg

 

The tubes fit in the holes in the head, and the rail connects over them. There were only three of these tubes. Does anyone know how these work, and do I absolutely need to source the 4th one? I wonder if these are used to cross the coolant passage.



#2 psyb0rg

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Posted 01 February 2019 - 06:49 AM

I just checked the head, and the brass tubes reside inside this tract, that connects the air pump to (I think) the valve chamber(?)

 

 

zVHHGxM.jpg



#3 MacGyver

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Posted 01 February 2019 - 07:25 AM

They had them on Austin Maestros too in Switzerland, can't help with the tubes tho.
Are you planning to refit them?

#4 psyb0rg

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Posted 01 February 2019 - 07:43 AM

They had them on Austin Maestros too in Switzerland, can't help with the tubes tho.
Are you planning to refit them?

 

Yes, I'll be fitting the smog pump to clear emission tests. 



#5 MacGyver

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Posted 01 February 2019 - 10:40 AM

Can you get some made by a machine shop?

#6 Ethel

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Posted 01 February 2019 - 12:28 PM

Hydraulic fittings supplier maybe? There are a few about making up lines for JCB's etc.



#7 DeadSquare

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Posted 01 February 2019 - 04:39 PM

I just checked the head, and the brass tubes reside inside this tract, that connects the air pump to (I think) the valve chamber(?)

 

 

zVHHGxM.jpg

 

 

Interesting to know how the plain end seals in the combustion chamber.

 

What is the outside diameter of the tubes ?



#8 psyb0rg

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Posted 01 February 2019 - 06:55 PM

 

I just checked the head, and the brass tubes reside inside this tract, that connects the air pump to (I think) the valve chamber(?)

 

 

 

Interesting to know how the plain end seals in the combustion chamber.

 

What is the outside diameter of the tubes ?

 

 

 

Outside diameter is 4.6mm. They're not too snug in the hole.



#9 psyb0rg

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Posted 01 February 2019 - 06:59 PM

I got these brake lines that are 0.1mm bigger (outer diameter) than the tubes. I think this should work.

 

4XvtsWC.jpg

 

BlybSDE.jpg

 

xEgdWtD.jpg


Edited by psyb0rg, 01 February 2019 - 06:59 PM.






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