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Brake Servo Vacuum Interchangability?

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#1 luismx123


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Posted 08 January 2020 - 08:09 AM

hey all,

Ive currently got a brake servo with a 5/8s "banjo bolt" in my inlet. 
I want to order a howley inlet manifold but the bolt size is smaller - owner cant seem to get a measurement for me but the head of the allen bolt in place is 1/2" diameter which should be a 3/8s thread. 

Is there a way to connect my servo to a 3/8s banjo bolt or is there some sort of adapter? Otherwise Ill have to get the inlet retapped to take the 5/8 thread and machine the surface around it flat. 

My only concern is that there is not enough surface in that area of a howley inlet to machine the thread and the surface for the copper seal/washer. 


#2 Moke Spider

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Posted 08 January 2020 - 06:51 PM

The Vacuum Hoses are 1/2". All you need do is find a fitting that has a thread and size to suit the Manifold with a 1/2" Barb. The hole size through the original Cooper S Barb is only 5/16" (8 mm), so as long as it's that or bigger, you should be fine.

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