The Triumph Dolomite Club - Discussion Forum

I thought the fuel tank had gone on the doly, though it was only dripping slowly from under the boot. This was after I filled it right to the top for the first time in a while.
I had a look under the mat when I saw the drips, and I could see it was wet with fuel down the right hand side of the tank, but couldn't see any around the outlet itself. I didn't look at where the filler tube goes in, just started looking for a replacement tank.
But after a few days of use and about 1/4 tank gone, it's stopped leaking and the smell is gone.
So, assuming it's not the tank itself, what are the most likely places to look - when it stops raining again - and are there any bits worth ordering now to do the job this weekend or early next week?
It may be worth a mention that a painter replaced the rubber round where the filler comes through the rear wing. Don't think he had the tank out.
Graham

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The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

Check the tank breather hose that reaches from the left rear corner of the tank up to near the top of the filler neck. It's almost certain to be old, cracked and original non ethanol resistant hose. Then have as much fun as I did getting 12mm R9 hose to replace it!

Also worth checking the seal round the tank sender unit.

Steve

PS, these days, I only ever fill to the first click off!

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'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.

Rimmers have that 141642 hose for about a tenner. Don't suppose anybody knows if that's ethanol resistant then. Mind you, I suppose it will last a few years, even if it's not.

How hard a job is it replacing that?

Graham

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

I have no idea whether the Rimmers hose is ethanol resistant or not, my money would be on not! I got mine from the local factors after a bit of a song and dance. The original stuff didn't last long at all on the Carledo, but I teed into it for my EFi return, the lifespan was in weeks with ordinary supermarket fuel running constantly though the short length between the tee and the tank!

It's not hard to change, you need to remove the N/S boot millboard and the filler neck to get at the top fitting, but still only a few minutes work. You WILL need a good metre of hose!

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.

I'm also running supermarket (Tesco) Super. But I guess mine's only wet when the tank's full or sloshes around. I don't normally run over half full. But it's been cheap lately, and I succumbed to greed. Still I'll see what local factors have. Thanks.

Graham.

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

would either 4.8 x 11.6mm or 5.6 x 12.6mm be right?

Graham

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

I'm pretty sure the original is 1/2" bore, so the 12.6 would be spot on. I made do with 12mm cos it's what I could get!

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.

Ok. Thanks Steve, I'll get a meter. But optimist that I aren't, that'll make the problem something else.

Graham

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

If it was easy mate, anyone could and would be doing it. Where would the fun be in that?

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.

Having people who'll help helps.
Graham

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

Don’t buy the rimmers pipe Graham! I did coz it was all I could find at the time. It took a serious effort with the hairdryer to warm it up enough to get it to fit. Quality looks like it will last five minutes or so

Just a thought, could the breather hose not be replaced with metal or copper pipe just joined by two small pieces of rubber pipe? Just thinking out loud

Tony.

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NOW A CLUB MEMBER 2017057

I try not to. And isn't it spelled "grimmers"?

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).

Yes it's possible. But probably not a good idea for 2 reasons. 1) general unavailability of 12mm copper pipe (you can get it, but it's hard to find, expensive and almost impossible to bend, ask me how I know!) 2) the original lays against the wing and goes round and between bits of the roof support structure, you'd have to bracket it back or lag it to stop it rattling, it's too much like hard work when you can just put a bit of bendy rubber hose in and quietly forget it for a few years!

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.

Aah yes, i remember the route of it now Steve.

Tony.

_________________
NOW A CLUB MEMBER 2017057