The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: UncleD on 10.12. 2018 13:14

Title: Oil feed and return lines diameter
Post by: UncleD on 10.12. 2018 13:14

A10 Super Rocket 1958
I am replacing the oil feed and return lines but have an inline oil filter on the return so can't buy off the shelf.

What are the internal diameters of these lines?  Are they the same?  Is there an optimal size suited to the pump and pressure it generates? 

Cheers.

Title: Re: Oil feed and return lines diameter
Post by: chaterlea25 on 10.12. 2018 16:01

Hi D,
5/16in. or 8mm bore is the correct size
If the filter head is a "Norton" type
The pipes will need some coaxing to stretch over the stubs on the housing
But the will go on, hot water and or a little silicone grease will ease the pain

John

Title: Re: Oil feed and return lines diameter
Post by: UncleD on 10.12. 2018 20:29

Quote from: chaterlea25 on 10.12. 2018 16:01

5/16in. or 8mm bore is the correct size
If the filter head is a "Norton" type

John

Cheers John,
The filter is a spin-on type from a Honda I believe (at least that is the filter size it takes).  I have had one hose off the filter block before and you're right, it is a pain to get back on.

I will have custom fitted braided lines made by ENZED...if I went to a slightly larger diameter just to make fitment to the filter block easier, would this cause problems with pressure/ flow?  If slightly larger lines were possible, to what extent? 10mm?

Title: Re: Oil feed and return lines diameter
Post by: Triton Thrasher on 10.12. 2018 22:26

You just need hoses that fit the stubs.

Don’t worry about “pressure/flow.”

Title: Re: Oil feed and return lines diameter
Post by: chaterlea25 on 10.12. 2018 23:34

Hi D,

Quote

Don’t worry about “pressure/flow.”

+1

John

Title: Re: Oil feed and return lines diameter
Post by: UncleD on 11.12. 2018 08:24

Thanks all. *wink2*