The Triumph Dolomite Club - Discussion Forum

Hello All
I've seen the recent posts about E5/10 fuel and 1300 fuel hose sizes. I've decided to replace the fuel hoses on my 1850. Does anyone know which sizes (ID) I need to purchase, please?
thanks
Dave

I fitted Gates Barricade to my 1500 twin carb which was 1/4" (6.3mm bore) from Moss Europe https://www.moss-europe.co.uk/fuel-hose ... 1025x.html - other suppliers available.......

I can't see why the 1850 should be any different as the part numbers seem to be the same

_________________
1979 Dolomite SE (Black Obviously)
2000 Saab 'Viggen' Convertible in 'Lightening Blue'

Dave

Only the hoses between the carbs are 1/4" on 1850 and Sprint, all the rest are 5/16" (8mm)

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.

For 1500cc dolomite owners our car have the same arrangement as the Sprint and the 1850.

I have just been and re measured the pipes in the engine bay of my 1500 SE with a micromotor - everything from pump outlet is 6mm ID bore as the steel cross engine bay and carb to carb pipes are 6.3mm OD

Tank hard line to pump rubber looks to possibly be 8mm bore, but I can't get it off to measure properly where it is in the garage atm so I suggest the op dave1850 measures up before ordering.

IIRC 6mm ID was tight on the pump outlet, but did go on when I changed the pipes (and pump) back in June

_________________
1979 Dolomite SE (Black Obviously)
2000 Saab 'Viggen' Convertible in 'Lightening Blue'

Dave

I've never replaced hard lines on a 1500SE, specifically, but I have on a couple of 1850s, several Sprints and also my old 73 Toledo. All of those cars had 8mm hard lines from back to front, including the stub pipe out of the tank itself. Also the pipe connections in and out of the fuel pump. It's a job I do frequently enough that I keep a roll of 8mm microbore copper central heating pipe in stock and have a set of original steel pipes in my indoor work room to use as patterns for bending up new ones. And a 30' roll of Gates Barricade 8mm hose, now half gone!

I do know the 1500 Spitfire had 1/4" hard lines throughout, as did many of the other "small chassis" Triumphs and I suspect the 1300FWD may run 1/4" pipe too, but not any Dolomites or Toledos that i'm aware of, with the exception of the pipes that actually connect the metal undercarb distribution pipe to the float chambers, which is 1/4". There may be differences in the underbonnet layout of some OHV cars, I have less experience with those models. It's even concievable that OE pumps on 1300/1500cc cars had a 5/16" inlet and a 1/4" outlet. If they did, I never noticed back in the day. However, if you know better.......

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.

Thank you everyone for your advice. I have now ordered and fitted hose and so I thought I should share the outcome.

I took your advice Classic Fan and ordered Gates Barricade from Moss. I ordered both 6.3mm and 8mm which was as well because the fuel lines are 8mm whereas the float chamber connections are 6mm. Glad I did change them - at least one had split in an out of sight area.

One remaining question - I'm having some difficulty refitting the air filter housing. It's the standard single box containing the twin round filters for the later 1850s. It may sound an obvious question but does the metal fuel feed line to the carbs tuck behind the filter box (ie the side nearest the carbs) or below it?

thanks
Dave

Interesting ! I've just had a look at SWK ( 1975 non-HL 1850 ) and the metal fuel pipe runs behind the air-filter box along the lower edge.
Now I've never noticed before but there is a metal P-clip 1/2 way along this metal fuel pipe with a rubber sleeve round the fuel pipe and a small nut and bolt through it. And it doesn't go anywhere. Looking at the parts book on page 1K 06R there is supposed to be a small rubber cotton reel mounting ( UKC2451 ) which I think goes to the accelerator bracket. It makes sense that this fuel line is supported.
Incidentally I used fuel hose off the reel a couple of years back, not the right-angle pre-formed UKC2813 fuel pipes ,and when the front hose got warm it would kink and cut off the fuel supply to the front carb; I reverted to UKC 2813 fuel hose.
HTH,
Tony.

Thank you Tony. Like you I have a '75 non-HL 1850. On mine, there is what appears to be the remainder of a metal clip with the rubber sleeve but no nut/bolt or apparent means to attach it anywhere. I suspect that long since departed the car. I managed to refit the air filter box with the pipe alongside as you suggest - it is effectively pushed by the box towards the engine but being attached to rubbers both ends that shouldn't be an issue.

Hopefully below (I don't often post pictures!) there will be a picture of the set up, including the broken clip. The rail shape is distinctly kinked in comparison with the parts book version which is straight. I added a small piece of spare hose rubber to the kink to prevent rubbing of the metal pipe against the box.

I useful point about the heat effect on the hose rubber. This time I've purchased and fitted r14 spec hose (supposed to be uprated over the old recommended minimum R6 spec) and I will monitor its performance. I also noticed that the fuel rail bend upwards to the carb sits only a couple of inches away from the alternator fins and I cannot recall if it was that close previously. Please if you have time to check could you look at yours and confirm? thank you, Dave

Hi Dave, Thanks for your reply. I had a look at my fuel pipes and I see what you mean . Mine does have a slight kink towards the front carb; but not as pronounced as yours. Yes, it still runs close to the alternator fan.
You can also see from the photo that I have again changed those 2 pipes for Petroflex versions.
I have slid the odd metal P-clip along to where it should be at the base of the UKC 2451 cotton reel mount. They are going to be selling a few of those soon !
One extra item. I took a photo of the back of the air-filter box. Mine has a bracket on it which I think is designed to affix under the cotton reel mounting nut. Mine has been bent upwards away from the nut. Having this extra mounting point is going to make the air filter more tricky to remove I reckon.
Tony.

Thank you so much Tony for checking your set up and posting the pictures. This has helped me understand what is going on. It would appear that the bobbin provides support for both the air filter box (fastened from the top) and the fuel rail (fasted beneath). I have attached an "aerial" view of mine showing the bracket attached to the bobbin and including a large washer which I suspect wasn't original. Your picture illustrates nicely how the rail is attached. My version is missing the rail clip.

It is also interesting to see how our fuel rails are bent. I wonder if both have been bent to suit the occasion in the past hence the different position of the kinks and the variance from the parts book diagram. It seems this rail is common to the 1850, Sprint and TR7 where the stock pictures show it as straight.

best regards
Dave