Quick Disconnect balance pipe

[Paul G (BHT)]

Anyone know what size the fuel line is between the two lobes on the large ADV tank?

Or better still anyone know which size quick disconnect I need to get for it?

When I fitted it a few months ago I forgot to measure the size of the pipe first and now want to fit a quick disconnect

 

[Vern]

Well,it depends on what bore the pipe is,and as you now have it fitted, and full of petrol no doubt,I'd say you's bolloxed.What do you think I am,a fookin mind reader.

Having said that,you could try holding it to your forehead to see if anyone picks up what size it is.

 

[Vern]

Well,it depends on what bore the pipe is,and as you now have it fitted, and full of petrol no doubt,I'd say you's bolloxed.What do you think I am,a fookin mind reader.

Having said that,you could try holding it to your forehead to see if anyone picks up what size it is.

 

[Vern]

Well,it depends on what bore the pipe is,and as you now have it fitted, and full of petrol no doubt,I'd say you's bolloxed.What do you think I am,a fookin mind reader.

Having said that,you could try holding it to your forehead to see if anyone picks up what size it is.

 

[Voyager]

Anyone know what size the fuel line is between the two lobes on the large ADV tank?

Or better still anyone know which size quick disconnect I need to get for it?

When I fitted it a few months ago I forgot to measure the size of the pipe first and now want to fit a quick disconnect

Do you mean a pair of these ?

In which case you will need 8mm internal diameter pipe (the width across the peaks on the connector stub is actually 9mm.

Bolted-up pipe clips are required as the fuel line runs at (from memory) 34 psi.

BUT . . Be aware that the standard BMW plastic fuel line connectors are considered suspect in some quarters.

It seems that the 'O' rings can swell when petrol reaches them, resulting in the plactic connectors breaking.

It has also been reported that the plastic components can go brittle with age and fracture without any help from the 'O' rings.

In the USA, BMW did a recall on the K1200 RS / GT models because of a number of incidents.

It seems that BMW advise Workshop Technicians to replace the 'O' rings at standard service intervals.


According to two web sites I have looked at, the 'cure' is to use metal connectors with 'VITON' 'O' rings that do not degrade in petrol.

I have just ordered two sets (one for my 2004 1150GSA, the other for my 2003 K1200GT) from Omega.co.uk.

The eight connectors, carriage & VAT cost £111.27.

Not cheap but possibly worthwhile insurance as I expect to be in the north of Norway around mid-2008, followed by a trip to Bosnia (and all places in between it and Scotland) around September 2008.

Its one of those decisions that may save hassle or not - one will never know.

I'll provide the connector details and the web site links if you want.

Bob.

 

[Paul G (BHT)]

Do you mean a pair of these ?

In which case you will need 8mm internal diameter pipe (the width across the peaks on the connector stub is actually 9mm.

Bolted-up pipe clips are required as the fuel line runs at (from memory) 34 psi.

BUT . . Be aware that the standard BMW plastic fuel line connectors are considered suspect in some quarters.

It seems that the 'O' rings can swell when petrol reaches them, resulting in the plactic connectors breaking.

It has also been reported that the plastic components can go brittle with age and fracture without any help from the 'O' rings.

In the USA, BMW did a recall on the K1200 RS / GT models because of a number of incidents.

It seems that BMW advise Workshop Technicians to replace the 'O' rings at standard service intervals.


According to two web sites I have looked at, the 'cure' is to use metal connectors with 'VITON' 'O' rings that do not degrade in petrol.

I have just ordered two sets (one for my 2004 1150GSA, the other for my 2003 K1200GT) from Omega.co.uk.

The eight connectors, carriage & VAT cost £111.27.

Not cheap but possibly worthwhile insurance as I expect to be in the north of Norway around mid-2008, followed by a trip to Bosnia (and all places in between it and Scotland) around September 2008.

Its one of those decisions that may save hassle or not - one will never know.

I'll provide the connector details and the web site links if you want.

Bob.

Bob, it's not the high pressure ones that connect to the supply/return lines, it's the one under the tank the 'balances' the two lobes of the tank

Well,it depends on what bore the pipe is,and as you now have it fitted, and full of petrol no doubt,I'd say you's bolloxed.What do you think I am,a fookin mind reader.

Having said that,you could try holding it to your forehead to see if anyone picks up what size it is.

Two fuel clamps should stop any spillage

PS You said that 3 times

 

[Voyager]

Bob, it's not the high pressure ones that connect to the supply/return lines, it's the one under the tank the 'balances' the two lobes of the tank

Paul,

Yes, I eventually understood that it wasn't the high pressure lines you were referring to (so I should have modified my post to remove the '34 psi' quote).

However, if you are intending to use the standard quick-connect couplings you may wish to consider non-BMW couplings as It appears that the leakage problems are not directly related to fuel pressure (though that would probably make it worse / happen quicker).

Just a thought.

I don't know what the balance pipe internal diameter is - but the standard connectors would need 8mm ID.

Bob.

 

[Bigtwin]

6mm How do I know - my QD broke - "we get a lot of them go Sir". Being Vines they had none in stock though of course.

BMW - fookin fortune, plus extra for o rings. Exact same things local MX shop - just under 1/2 the price all-in.

I put a longer hose on the long side too, as my OE one was just short enough to make it a fiddle get undone and up again, and to place strain on the connector.

 

[DrFarkoff]

YOu need a 90 degree one at the right hand side and the straight crosses over the top of the engine from the nearside

 

[Paul G (BHT)]

Cheers chaps, just ordered a 6mm QD from here

 

[Paul G (BHT)]

YOu need a 90 degree one at the right hand side and the straight crosses over the top of the engine from the nearside

missed this post and ordered this... I'm sure it will be fine

 

[DrFarkoff]

Nope Too tight from where the balance exits the RHS of the tank

It sort of dangles at the appropriate height and the straight connector slots in nicely!

 

[(RIP) Bin Ridin]

Anyone hear the new BMW couplers are alloy, not plastic?

 

[Paul G (BHT)]

Nope Too tight from where the balance exits the RHS of the tank

It sort of dangles at the appropriate height and the straight connector slots in nicely!

I'll let you know how it goes when it arrives

 

[Vern]

PS You said that 3 times [/QUOTE]

The beer fairy had been

 

[Possu]

On the crossover pipe, fit an extra 90 degree quick fuel disconnect on the left of the tank. Makes tank removal & refitting much easier & quicker, no need to thread the pipe back over the top of the engine, just sits there:

 

[bubba zanetti]

hi all, Crosslings plumbing merchants do these plastic QD fittings in various sizes and angles/ fitments for decent prices

bubba