Almost one less Griff today!
Discussion
Took the Griff for an MOT today. During the MOT it was discovered that the fuel return hose had perished and split spilling fuel on to a hot exhaust pipe 
the engine was running up on the ramp!
Fortunately for me the car hadn't burst in to flames on the way to the garage or during the MOT. A big thank you to Colin at TVRS Wellington for repairing the Griff and ensuring it passed the MOT with no advisories, it could have easily ended badly for the Griff and potentially me too. Pictures of the split hose and the hot exhaust pipes soaked with petrol below.
JT
the engine was running up on the ramp! Fortunately for me the car hadn't burst in to flames on the way to the garage or during the MOT. A big thank you to Colin at TVRS Wellington for repairing the Griff and ensuring it passed the MOT with no advisories, it could have easily ended badly for the Griff and potentially me too. Pictures of the split hose and the hot exhaust pipes soaked with petrol below.
JT
One of the root causes is that the old hoses are not compatible with the bioethanol added to our petrol in ever increasing amounts these days.
Get your fuel lines checked asap folks!
Even a lot of new hoses can degrade in a surprisingly short time. There is some dubious stuff of Chinese origin that is supposedly suitable for unleaded petrol, but it ain't! It can become porous in a few months.
Gates "Barricade" fuel injection hose is the stuff to fit to be sure of your ( and your car's ) safety.
Also make sure you use the correct high pressure injection hose clips rather than the "Jubilee" type that don't really clamp uniformly.
Get your fuel lines checked asap folks!
Even a lot of new hoses can degrade in a surprisingly short time. There is some dubious stuff of Chinese origin that is supposedly suitable for unleaded petrol, but it ain't! It can become porous in a few months.
Gates "Barricade" fuel injection hose is the stuff to fit to be sure of your ( and your car's ) safety.
Also make sure you use the correct high pressure injection hose clips rather than the "Jubilee" type that don't really clamp uniformly.
I have two metres of this.
I have R6 fitted to the top of my engine only 3 or so months ago which are splitting at the connection already.
I've been informed this R9 is as good as it gets, I've not fitted it yet and not looked into what properties R9 have so feel free to discuss.
I better fit it ! Phew that's one close shave.
Made in the Czech Republic.
Maybe if this is the stuff to have a group buy as it's not cheap and comes on the roll or Verborten can get it cheaper maybe?
I have R6 fitted to the top of my engine only 3 or so months ago which are splitting at the connection already.
I've been informed this R9 is as good as it gets, I've not fitted it yet and not looked into what properties R9 have so feel free to discuss.
I better fit it ! Phew that's one close shave.
Made in the Czech Republic.
Maybe if this is the stuff to have a group buy as it's not cheap and comes on the roll or Verborten can get it cheaper maybe?
Edited by Classic Chim on Monday 12th June 12:32
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Steve_D said:
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Sorry to correct you there Steve but Codan R6 5/16 -8mm has a working pressure of 12 BAR, not that matter now as its superseded I still have a roll of the mentioned (not much mind) but Continental R9 convert now R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
It's because of this potential issue I fitted nylon fuel line. It's used on Gbs kit cars and most likely other kit cars.
From the pump to engine and return also. Small hose from this to pump and tank and engine.
http://www.kitspares.co.uk/index.php?route=product...
From the pump to engine and return also. Small hose from this to pump and tank and engine.
http://www.kitspares.co.uk/index.php?route=product...
Sardonicus said:
Steve_D said:
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Sorry to correct you there Steve but Codan R6 5/16 -8mm has a working pressure of 12 BAR, not that matter now as its superseded I still have a roll of the mentioned (not much mind) but Continental R9 convert now R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
4.4 Low-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R6), (SAE 30R7), (SAE 30R8)
Hose which may be supplied either coupled or uncoupled for use with gasoline, diesel fuel, lubrication oil, or the vapor
present in either the fuel system or in the crankcase of internal combustion engines in mobile, stationary, and marine
applications. Exposure of these hoses to gasoline or diesel fuel which contain high levels, greater than 5% by volume, of
oxygenates, i.e., ethanol, methanol, or MTBE (methyl tertiary butyl ether), may result in significantly higher permeation
rates than those listed for 30R6, 7, or 8. This hose is for maximum working pressures of 0.34 MPa (50 psi) up to and
including 9.53 mm (3/8 in) ID and 0.24 MPa (35 psi) for over 9.53 mm (3/8 in). For 30R6 hose in excess of 25.40 mm
(1 in), the working pressure is 0.11 MPa (16 psi). The hose may be furnished in long lengths, specific cut lengths, or as a
part preformed to a specific configuration. This hose is suitable for use in temperatures up to 100 °C (212 °F) for 30R6,
125 °C (257 °F) for 30R7, 150 °C (302 °F) intermittently and 135 °C (275 °F) continuously for 30R8.
The construction of this hose embodies a smooth bore tube of fuel- and oil-resistant synthetic rubber compound, suitably
reinforced with textile fiber yarn, cord, or fabric, and a cover of suitable oil-, ozone-, and heat-resistant synthetic rubber
compound.
SAE J30 Revised DEC2008 - 7 -
4.5 Fuel Injection Hose Medium-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R9)
Hose primarily intended to meet the demands of fuel injection systems. These would include, for example, electronic fuel
metering (EFM), electronic fuel injection (EFI), throttle body injection (TBI), and the like. Other areas of utility are those
applications requiring fuel permeation resistance exceeding 30R8 and ones which require fuel resistance greater than
that obtainable with 30R6, 7, and 8. Exposure of this hose to gasoline or diesel fuel that contains high levels, greater than
5% by volume, of oxygenates, i.e., ethanol, methanol, or MTBE may result in significantly higher permeation rates than
realized with ASTM Fuel C. This hose may be supplied in either a coupled or uncoupled form, and is useful in the
transportation of gasoline, ethanol extended gasoline, diesel fuel, lubrication oil, or the vapor present in either the fuel
system or the crankcase of internal combustion engines in mobile, stationary, and marine applications. This hose has a
maximum working pressure of 0.69 MPa (100 psi) up to and including 12.70 mm (1/2 in) ID. This hose may be furnished
in long lengths, specific cut lengths, or as a part preformed to a specific configuration. This hose is suitable for use in
normal operating temperatures of 34 to 135 °C (29 to 275 °F) and intermittent use at 150°C (302 °F).
The construction of this hose typically consists of a smooth bore tube or laminated tube(s) of a synthetic rubber
compound(s) resistant to chemical attack, swelling, and permeation by gasoline, oxidized ("sour") gasoline, ethanol
extended gasoline, diesel fuel, and oil or lubricants. It shall be suitably reinforced with a textile fiber, yarn, cord, or fabric,
and a cover of a suitable oil-, ozone-, and heat-resistant elastomer.
Steve
Steve_D said:
Sardonicus said:
Steve_D said:
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Sorry to correct you there Steve but Codan R6 5/16 -8mm has a working pressure of 12 BAR, not that matter now as its superseded I still have a roll of the mentioned (not much mind) but Continental R9 convert now R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
4.4 Low-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R6), (SAE 30R7), (SAE 30R8)
Hose which may be supplied either coupled or uncoupled for use with gasoline, diesel fuel, lubrication oil, or the vapor
present in either the fuel system or in the crankcase of internal combustion engines in mobile, stationary, and marine
applications. Exposure of these hoses to gasoline or diesel fuel which contain high levels, greater than 5% by volume, of
oxygenates, i.e., ethanol, methanol, or MTBE (methyl tertiary butyl ether), may result in significantly higher permeation
rates than those listed for 30R6, 7, or 8. This hose is for maximum working pressures of 0.34 MPa (50 psi) up to and
including 9.53 mm (3/8 in) ID and 0.24 MPa (35 psi) for over 9.53 mm (3/8 in). For 30R6 hose in excess of 25.40 mm
(1 in), the working pressure is 0.11 MPa (16 psi). The hose may be furnished in long lengths, specific cut lengths, or as a
part preformed to a specific configuration. This hose is suitable for use in temperatures up to 100 °C (212 °F) for 30R6,
125 °C (257 °F) for 30R7, 150 °C (302 °F) intermittently and 135 °C (275 °F) continuously for 30R8.
The construction of this hose embodies a smooth bore tube of fuel- and oil-resistant synthetic rubber compound, suitably
reinforced with textile fiber yarn, cord, or fabric, and a cover of suitable oil-, ozone-, and heat-resistant synthetic rubber
compound.
SAE J30 Revised DEC2008 - 7 -
4.5 Fuel Injection Hose Medium-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R9)
Hose primarily intended to meet the demands of fuel injection systems. These would include, for example, electronic fuel
metering (EFM), electronic fuel injection (EFI), throttle body injection (TBI), and the like. Other areas of utility are those
applications requiring fuel permeation resistance exceeding 30R8 and ones which require fuel resistance greater than
that obtainable with 30R6, 7, and 8. Exposure of this hose to gasoline or diesel fuel that contains high levels, greater than
5% by volume, of oxygenates, i.e., ethanol, methanol, or MTBE may result in significantly higher permeation rates than
realized with ASTM Fuel C. This hose may be supplied in either a coupled or uncoupled form, and is useful in the
transportation of gasoline, ethanol extended gasoline, diesel fuel, lubrication oil, or the vapor present in either the fuel
system or the crankcase of internal combustion engines in mobile, stationary, and marine applications. This hose has a
maximum working pressure of 0.69 MPa (100 psi) up to and including 12.70 mm (1/2 in) ID. This hose may be furnished
in long lengths, specific cut lengths, or as a part preformed to a specific configuration. This hose is suitable for use in
normal operating temperatures of 34 to 135 °C (29 to 275 °F) and intermittent use at 150°C (302 °F).
The construction of this hose typically consists of a smooth bore tube or laminated tube(s) of a synthetic rubber
compound(s) resistant to chemical attack, swelling, and permeation by gasoline, oxidized ("sour") gasoline, ethanol
extended gasoline, diesel fuel, and oil or lubricants. It shall be suitably reinforced with a textile fiber, yarn, cord, or fabric,
and a cover of a suitable oil-, ozone-, and heat-resistant elastomer.
Steve
dont want to come over argumentative however 
Sardonicus said:
Steve_D said:
Sardonicus said:
Steve_D said:
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Sorry to correct you there Steve but Codan R6 5/16 -8mm has a working pressure of 12 BAR, not that matter now as its superseded I still have a roll of the mentioned (not much mind) but Continental R9 convert now R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
4.4 Low-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R6), (SAE 30R7), (SAE 30R8)
Hose which may be supplied either coupled or uncoupled for use with gasoline, diesel fuel, lubrication oil, or the vapor
present in either the fuel system or in the crankcase of internal combustion engines in mobile, stationary, and marine
applications. Exposure of these hoses to gasoline or diesel fuel which contain high levels, greater than 5% by volume, of
oxygenates, i.e., ethanol, methanol, or MTBE (methyl tertiary butyl ether), may result in significantly higher permeation
rates than those listed for 30R6, 7, or 8. This hose is for maximum working pressures of 0.34 MPa (50 psi) up to and
including 9.53 mm (3/8 in) ID and 0.24 MPa (35 psi) for over 9.53 mm (3/8 in). For 30R6 hose in excess of 25.40 mm
(1 in), the working pressure is 0.11 MPa (16 psi). The hose may be furnished in long lengths, specific cut lengths, or as a
part preformed to a specific configuration. This hose is suitable for use in temperatures up to 100 °C (212 °F) for 30R6,
125 °C (257 °F) for 30R7, 150 °C (302 °F) intermittently and 135 °C (275 °F) continuously for 30R8.
The construction of this hose embodies a smooth bore tube of fuel- and oil-resistant synthetic rubber compound, suitably
reinforced with textile fiber yarn, cord, or fabric, and a cover of suitable oil-, ozone-, and heat-resistant synthetic rubber
compound.
SAE J30 Revised DEC2008 - 7 -
4.5 Fuel Injection Hose Medium-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R9)
Hose primarily intended to meet the demands of fuel injection systems. These would include, for example, electronic fuel
metering (EFM), electronic fuel injection (EFI), throttle body injection (TBI), and the like. Other areas of utility are those
applications requiring fuel permeation resistance exceeding 30R8 and ones which require fuel resistance greater than
that obtainable with 30R6, 7, and 8. Exposure of this hose to gasoline or diesel fuel that contains high levels, greater than
5% by volume, of oxygenates, i.e., ethanol, methanol, or MTBE may result in significantly higher permeation rates than
realized with ASTM Fuel C. This hose may be supplied in either a coupled or uncoupled form, and is useful in the
transportation of gasoline, ethanol extended gasoline, diesel fuel, lubrication oil, or the vapor present in either the fuel
system or the crankcase of internal combustion engines in mobile, stationary, and marine applications. This hose has a
maximum working pressure of 0.69 MPa (100 psi) up to and including 12.70 mm (1/2 in) ID. This hose may be furnished
in long lengths, specific cut lengths, or as a part preformed to a specific configuration. This hose is suitable for use in
normal operating temperatures of 34 to 135 °C (29 to 275 °F) and intermittent use at 150°C (302 °F).
The construction of this hose typically consists of a smooth bore tube or laminated tube(s) of a synthetic rubber
compound(s) resistant to chemical attack, swelling, and permeation by gasoline, oxidized ("sour") gasoline, ethanol
extended gasoline, diesel fuel, and oil or lubricants. It shall be suitably reinforced with a textile fiber, yarn, cord, or fabric,
and a cover of a suitable oil-, ozone-, and heat-resistant elastomer.
Steve
dont want to come over argumentative however In terms of SAE J30 R6 is low pressure for carb engines (50psi) and R9 is for fuel injected engines.
Steve
Steve_D said:
Sardonicus said:
Steve_D said:
Sardonicus said:
Steve_D said:
R6 is not rated for fuel injection pressures.
R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
Sorry to correct you there Steve but Codan R6 5/16 -8mm has a working pressure of 12 BAR, not that matter now as its superseded I still have a roll of the mentioned (not much mind) but Continental R9 convert now R9 is the minimum we should be considering but you could use R6 for the return and tank vent to carbon canister as these are not under pressure but I would still be using a known brand.
In terms of which make hose to use we are using Gates Barricade but if you find something you are confident with the manufacturers name printed on such as Continental etc. then you should be OK.
Hose with just the specification printed in bold white letters is to be avoided.
See the Southways sticky on the subject.
Steve
4.4 Low-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R6), (SAE 30R7), (SAE 30R8)
Hose which may be supplied either coupled or uncoupled for use with gasoline, diesel fuel, lubrication oil, or the vapor
present in either the fuel system or in the crankcase of internal combustion engines in mobile, stationary, and marine
applications. Exposure of these hoses to gasoline or diesel fuel which contain high levels, greater than 5% by volume, of
oxygenates, i.e., ethanol, methanol, or MTBE (methyl tertiary butyl ether), may result in significantly higher permeation
rates than those listed for 30R6, 7, or 8. This hose is for maximum working pressures of 0.34 MPa (50 psi) up to and
including 9.53 mm (3/8 in) ID and 0.24 MPa (35 psi) for over 9.53 mm (3/8 in). For 30R6 hose in excess of 25.40 mm
(1 in), the working pressure is 0.11 MPa (16 psi). The hose may be furnished in long lengths, specific cut lengths, or as a
part preformed to a specific configuration. This hose is suitable for use in temperatures up to 100 °C (212 °F) for 30R6,
125 °C (257 °F) for 30R7, 150 °C (302 °F) intermittently and 135 °C (275 °F) continuously for 30R8.
The construction of this hose embodies a smooth bore tube of fuel- and oil-resistant synthetic rubber compound, suitably
reinforced with textile fiber yarn, cord, or fabric, and a cover of suitable oil-, ozone-, and heat-resistant synthetic rubber
compound.
SAE J30 Revised DEC2008 - 7 -
4.5 Fuel Injection Hose Medium-Pressure Coupled and Uncoupled Synthetic Rubber Tube and Cover (SAE 30R9)
Hose primarily intended to meet the demands of fuel injection systems. These would include, for example, electronic fuel
metering (EFM), electronic fuel injection (EFI), throttle body injection (TBI), and the like. Other areas of utility are those
applications requiring fuel permeation resistance exceeding 30R8 and ones which require fuel resistance greater than
that obtainable with 30R6, 7, and 8. Exposure of this hose to gasoline or diesel fuel that contains high levels, greater than
5% by volume, of oxygenates, i.e., ethanol, methanol, or MTBE may result in significantly higher permeation rates than
realized with ASTM Fuel C. This hose may be supplied in either a coupled or uncoupled form, and is useful in the
transportation of gasoline, ethanol extended gasoline, diesel fuel, lubrication oil, or the vapor present in either the fuel
system or the crankcase of internal combustion engines in mobile, stationary, and marine applications. This hose has a
maximum working pressure of 0.69 MPa (100 psi) up to and including 12.70 mm (1/2 in) ID. This hose may be furnished
in long lengths, specific cut lengths, or as a part preformed to a specific configuration. This hose is suitable for use in
normal operating temperatures of 34 to 135 °C (29 to 275 °F) and intermittent use at 150°C (302 °F).
The construction of this hose typically consists of a smooth bore tube or laminated tube(s) of a synthetic rubber
compound(s) resistant to chemical attack, swelling, and permeation by gasoline, oxidized ("sour") gasoline, ethanol
extended gasoline, diesel fuel, and oil or lubricants. It shall be suitably reinforced with a textile fiber, yarn, cord, or fabric,
and a cover of a suitable oil-, ozone-, and heat-resistant elastomer.
Steve
dont want to come over argumentative however In terms of SAE J30 R6 is low pressure for carb engines (50psi) and R9 is for fuel injected engines.
Steve
however I did save this I supose different brands spec R6 for different apps nothing we haven't seen before backwards and forwards compatibility super-cessions etc, not having a dig or nowt 
just out of interest 
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