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Gas leaking from the carburator - help

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Richard Pooran

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There is gas leaking out of my carburator - it is coming from the small feeder hose that is under the carb(front one). It is a small flexible hose which goes into a brass nut. The gas is leaking out where the tube enters the nut. I don't really understand what holds this hose in place since it seems to just slip into the nut? Any advice would be greatly appreciated.

Thanks

Richard
 
Richard, now for your second repair!
That tube is the tube that feeds fuel from the float bowl to the carburetor jet. On the inside of the brass nut, on the end of the tube, there is a little brass washer, and a rubber 'O' ring. When you tighten the nut, the 'O' ring expands and keeps the tube in place. My guess is that the 'O' ring has deteriorated, allowing the fuel leak. You could try to snug the nut up a bit tighter, but not too tight. I would take the thing off, and see what shape the seal is in. Sometimes when you remove the tube, the seal will stay inside the float chamber body, and you will have to hook it out with a pick.
You may be able to find something the right size to replace it at the local parts store. If not. Victoria British, Moss Motors, and several other places sell them separately. Maybe some of our Canadian members can help you out, as the things only cost about $2.00 US apiece, and it would kill you for shipping from the States. Mr.Mini, in Stony Creek may be able to help you. The carburetors are SU, HS2's, by the way.
Jeff

[ 03-20-2004: Message edited by: Bugeye58 ]</p>
 
Jeff,

I took the the tube and brass nut off and have seen no sign of a rubber washer. I imagine that the washer is either missing or in the tube. I did snug up the nut and the leaking has stoped.
(I had to take the car out for a ride)
I guess that I should make sure that the rubber washer is in place and working? Do I need to take the whole carb off the engine to do this? I looked at carb and it seems like there are 4 bolts and a couple of springs that I would need to remove. Is this a job that a relative newbie should atempt? How long would you estimate it would take?
Thanks for the advice - how long have you been working on triumphs?
Rich
 
Richard, the rubber ring is probably still in the body of the float chamber. As long as it's not leaking, and runs OK, I wouldn't mess with it for now.
No, you don't have to remove the carbs to replace the ring, just be patient, as it can be a bit of a fiddle. Even if you pull the carbs, it should only take a couple of hours. Do you have the workshop manual? If you are new to this, I would strongly recommend that you get a copy of the Bentley Manual for the car. They are reprints of the factory books, and are invaluable.
I hate to say how long I've been messing with these things, but I got my first TR3 in 1966.
Jeff

[ 03-20-2004: Message edited by: Bugeye58 ]</p>
 
Jeff,

I do have a couple shop manuals and that's how I usually know enough to get some advice from people on here. Can I asume that if it is not leaking that the ruber O ring is in place. My only worry is that it will start leaking at some point when i'm driving.

I spend most of my time working with computers. This new hobby of mine helps me understand those people that don't get computers a little better.

Thanks for your advise and patience.

Rich
 
That's a very common place to leak. It's kind of a rinky-dink system. I battled the same leak after rebuilding the carbs on my now gone MGB.

The washer is probably still in there...the tube can just pull out if the washer comes off, causing the leak.
 
Richard,

I battled the same leak combined with a backfire problem and ended up with a slightly scorched 1975 Jaguar. I believe you also have the Stromberg 175CD-2 Setup on the car. My advice is to not assume that the leak has stopped and go ahead and get new o-rings for both sides. There shouldn't be any need to pull the carbs at this point, maybe ever, and you may end up saving your eyebrows in the process... wish I had done it. I also decided on one test drive when I thought I had magically corrected the problem. To date, it has been the last time I drove the car. I am still trying to reconnect the carbs and replace all the burnt components....

Brian

Brian
 
Brian, the '68 Spit had the dual SU HS2 setup on it. The jet tubes are notorious for leaking there, and it's a simple fix.

Jeff
 
Bugeye,

Thanks, misread and thought it was a TR6. I'd say my misfortune was rare anyway, just thought I'd share what I ended up with.

Brian
 
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