gilesday Posted March 4, 2013 Report Share Posted March 4, 2013 Started to do this for the first time ever today and was a little alarmed when, having loosened the stirrup nut, petrol started pouring onto the floor. Time to stop and consult the forum, I thought. Is this normal and does it stop after a short while? If not, am I meant to close the fuel line in some way first ? Grateful for any insights from anyone who has managed to carry out this operation successfully. Quote Link to post Share on other sites
TR 2100 Posted March 4, 2013 Report Share Posted March 4, 2013 Yes - it stops after a while - when the level in the fuel tank drops below the level of the petrol pump. Jacking up the front of the car and doing it when there is not so much fuel in the tank - helps. AlanR Quote Link to post Share on other sites
Ade-TR4 Posted March 4, 2013 Report Share Posted March 4, 2013 An in-line tap is a useful addition Ade Quote Link to post Share on other sites
ianc Posted March 4, 2013 Report Share Posted March 4, 2013 One of Triumph's 'improvements' in moving from TR3A to TR4, was to eliminate the fuel cut-off valve just forward of the bulkhead. It's a very good idea to obtain a modern cut-off valve and install it at this point. As Alan says, jack up the front of the car to a decent height - if the tank is less than half full, that should stop the flow! If the tank is full, siphon out as much fuel as you can, but be careful not to swallow any of it. Unfortunately, there were even more 'improvements' in the move from TR4 to TR4A, but I'll refrain from listing them here! Ian Cornish Quote Link to post Share on other sites
gilesday Posted March 4, 2013 Author Report Share Posted March 4, 2013 Thanks all. As luck would have it the tank is just under half full and so I'll try raising the front as suggested. Not a great piece of design........... Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 4, 2013 Report Share Posted March 4, 2013 I would clamp the flex feed hose to the pump with a brake hose clamp or pair of mole grips with rag protection between the grips and the hose. Do not do it on wire braided petroflex or the hose will end up squashed and will not flow fuel properly again. Cheers Peter W. Quote Link to post Share on other sites
BrianC Posted March 4, 2013 Report Share Posted March 4, 2013 Alternative to jacking the rear or if you have too much fuel in the tank, is to pull the flexible hose from the pump and stuff a screwdriver in to block the fuel flow. For a slightly more professional approach, I always carry a brake hose clamp (about £5 in Halfords) in case of fuel problems away from home. Quote Link to post Share on other sites
Menno van Rij Posted March 4, 2013 Report Share Posted March 4, 2013 I would clamp the flex feed hose to the pump with a brake hose clamp or pair of mole grips with rag protection between the grips and the hose. Do not do it on wire braided petroflex or the hose will end up squashed and will not flow fuel properly again. Cheers Peter W. ... Or put a torx/phillips screw driver point into the flex hose and clamp that with a hose clamp. That way, you will not squash the hose with the clamp. And the tap, one like this will do. It's a Weber product Quote Link to post Share on other sites
littlejim Posted March 4, 2013 Report Share Posted March 4, 2013 Menno's solution is a thing of beauty and the best way to go. I usally clamp the flexible hose near the pump, or jam a pencil in it. Quote Link to post Share on other sites
Superaquarama Posted March 4, 2013 Report Share Posted March 4, 2013 A handy little anti-theft device, too. Car would start and go a few hundred yards before 'breaking down' and being hastily abandoned. Where do you get those little taps? Quote Link to post Share on other sites
Steve Priest Posted March 4, 2013 Report Share Posted March 4, 2013 Worth using a mirror or feel with your finger to check the state of the gasket that seals the bowl to the pump body. I recently discovered that mine was falling to bits and probably contributed half the rubbish I removed from the bowl. Steve Quote Link to post Share on other sites
Menno van Rij Posted March 4, 2013 Report Share Posted March 4, 2013 (edited) A handy little anti-theft device, too. Car would start and go a few hundred yards before 'breaking down' and being hastily abandoned. Where do you get those little taps? A handy little anti-theft device, too. Car would start and go a few hundred yards before 'breaking down' and being hastily abandoned. Where do you get those little taps? I bought mine on a Dutch Rally Sport & Tuning website. http://www.biesheuvel.nl/group/86/carburateurs___accessoires But, as said, they are from Weber Carb. So, I think they can be found in difference places. I have no part#, but I'll have a look tomorrow. Menno EDIT: Found one in the UK! http://www.fuelpumpsonline.co.uk/motorsport-fuel-cut--shut-off-tap-metal-handle-6mm-8mm-or-10mm-1953-p.asp Edited March 4, 2013 by Menno van Rij Quote Link to post Share on other sites
BrianC Posted March 5, 2013 Report Share Posted March 5, 2013 Menno, Every time I see your photo of this setup I remember it's still on my 'To Do' list. Which fuel filter are you using? When I had my car tuned by Peter Baldwin on a rolling-road, the plastic fuel filter on the feed to the pump was found to be collapsing, mainly due to softening by fuel because I hadn't changed it for 4 years - well, it wasn't dirty! However, Peter said that this often happens with electric pumps. Although the mechanical AC pump doesn't suck that hard, since it has the mesh filter built in, it's safer to remove the filter from the feed and fit one on the carb side if necessary. I've been running without a filter since then although I am undecided as to whether to fit a metal or glass filter in the feed, as I don't like having a filter near the carbs after what happened to Lynda's TR4A. The alternative is to fit it low down nearer the pump and modify the solid fuel line routing. Quote Link to post Share on other sites
MilesA Posted March 7, 2013 Report Share Posted March 7, 2013 Hi Brian Although the set up on my 3A is different to yours see my post here for an idea. http://www.tr-register.co.uk/forums/index.php?/topic/39843-in-line-fuel-filter-required/&do=findComment&comment=305915 Miles Quote Link to post Share on other sites
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