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Fuel tank breather hose

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Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Fuel tank breather hose

Postby Rich K » 23 Apr 2023 11:42

Hi, can anyone tell me the bore diameter of the fuel tank breather hose? About to fit the new tank to the gold convertible and wanting to replace the breather as a matter of course.
Thanks.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

Beans
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Re: Fuel tank breather hose

Postby Beans » 23 Apr 2023 16:52

Surely with the tank out of the car it shouldn't be too difficult to measure the breather tube?
Image
1976 TR7 FHC (currently being restored ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng)

http://www.tr7beans.blogspot.com/

Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Re: Fuel tank breather hose

Postby Rich K » 23 Apr 2023 21:38

You are correct Beans but I don’t have the tank to hand at the moment as it is with the car elsewhere. I am currently ordering parts for the next batch of work before going back over to where it is located.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

Beans
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Posts: 7788
Joined: 15 Mar 2006 19:29
Location: Netherlands
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Re: Fuel tank breather hose

Postby Beans » 25 Apr 2023 22:35

Rich K wrote: ... but I don’t have the tank to hand at the moment ...

Same here, but I will be in the shed again the coming weekend.
So if still neede and I don't forget, I'll measure the breather diameter :roll:
Image
1976 TR7 FHC (currently being restored ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng)

http://www.tr7beans.blogspot.com/

Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Re: Fuel tank breather hose

Postby Rich K » 26 Apr 2023 21:15

Thanks Beans, that would be helpful.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

Roger27TBB
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Re: Fuel tank breather hose

Postby Roger27TBB » 27 Apr 2023 23:58

Hi Rich,
i have just measured the diameter of the breather tube from my spareparts Fuel tank.
It is 8.2mm.
The diameter of the filling tube is 51mm.

Greetings

Roger27TBB

Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Re: Fuel tank breather hose

Postby Rich K » 28 Apr 2023 09:18

Hi Roger, thanks for the info. Could you measure the internal diameter of the breather pipe as well? Thanks.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

Roger27TBB
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Joined: 14 Nov 2014 19:49
Location: Germany
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Re: Fuel tank breather hose

Postby Roger27TBB » 28 Apr 2023 18:46

Hi Rich,

the inner diameter is 5.8mm due to the paint,
The tube is 40mm long as the filler tube also.
I have two Fuel tanks at home, one aftermarket
an one Original and made a comparison to be secure.
The metal of the filler tube on the Original is 1mm thick
as the breather also.
The metal on the aftermarket filler tube is 1.5mm thick and the
breather tube is only 17mm long and closer to the filler tube.
The Quality of the aftermarket Fuel tank is not the good.
Do you repair your Fuel tank?

Greetings
RogerTBB

Beans
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Posts: 7788
Joined: 15 Mar 2006 19:29
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Re: Fuel tank breather hose

Postby Beans » 29 Apr 2023 18:11

Breather outer diameter is just shy of 8mm on an original tank
So a stock 8mm fuel hose will get you sorted
Image
1976 TR7 FHC (currently being restored ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng)

http://www.tr7beans.blogspot.com/

Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Re: Fuel tank breather hose

Postby Rich K » 02 May 2023 22:01

Thanks Beans. Tank now fitted. Next step will be fitting the refurbished axle and rear suspension.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

Rich K
Wedge Pilot
Posts: 291
Joined: 08 Aug 2015 18:04
Location: Worcester, United Kingdom

Re: Fuel tank breather hose

Postby Rich K » 02 May 2023 22:03

Thanks Roger. Tank now fitted. It was a new tank but I have also coated the inside with POR15 Tank sealer to provide the maximum protection against corrosion.
1980 TR7 drophead now repainted and started refitting plus V8 upgrade
1977 TR7 fixedhead awaiting restoration
1981 TR7 drophead bodywork and mechanicals now done, completing trim currently.
Ford Ranger Wildtrak
Jaguar XKR Supercharged

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