William Marsh Posted October 26 Report Share Posted October 26 I have signs of a slight leak at the threaded fuel line input to the mechanical fuel pump on my TR4A. When I unscrewed the junction I could not stop fuel supply from the tank, so quickly reconnected the feed. Is there any way around this problem as I wanted to remove the filter in the pump to clean it. I did wonder if it was feasible to fit an in-line on/off fuel tap? I also intended to fit an in-line glass filter between the tank feed and the pump but I would also have the same problem if I wanted to periodically clean this filter. Quote Link to post Share on other sites
RobH Posted October 26 Report Share Posted October 26 The earlier sidescreen cars had a tap, so yes easy to do. You don't need another fuel filter before the pump - it already has a strainer and glass bowl which does the job. Quote Link to post Share on other sites
Rob Salisbury Posted October 26 Report Share Posted October 26 Hi William, Do the work you need to when the tank is low on fuel and jack the front of the car up so that the pump is higher than the residual fuel in the tank. Cheers Rob Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 26 Report Share Posted October 26 If you have a rubber hose from chassis pipe to pump inlet union clamp the hose with a hose clamp. Same as you would do on the brake hoses when servicing. https://www.ebay.co.uk/itm/333710618567?_trkparms=amclksrc%3DITM%26aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D275608%26meid%3D52478fbbd1f04c1a9b87ade5c6ca967f%26pid%3D101949%26rk%3D1%26rkt%3D1%26itm%3D333710618567%26pmt%3D1%26noa%3D1%26pg%3D4375194%26algv%3DRecentlyViewedItemsV2WithMLRV6RankerPricelessTop30FeaturesAndWatchlistFilter_BP&_trksid=p4375194.c101949.m162918&_trkparms=parentrq%3Aca42214e1920a1ef060f157ffffff442|pageci%3Acac66428-93ce-11ef-b4e7-3aac0aacf2f6|iid%3A1|vlpname%3Avlp_homepage Quote Link to post Share on other sites
John Morrison Posted October 26 Report Share Posted October 26 Have to say I'm not keen on those clamps, for anything. Re the fuel pipe, I only ever use a 5/16 bolt, pull the Jubilee clip and have the bolt ready, shove it up the end, it will screw in by hand, pop a clip on and work to your hearts content. Another option for the future, learned on this forum, is that screwfix do an 8mm on/off tap ideal for our 5/16 copper fuel pipe, comes with two olives, and simplifies work for ever more. Agree with in line fuel filters, I have one before the pump and one before the carbs. An advantage if your car stops abruptly, look at that filter near the carbs. if its full of fuel, its likely not to be a petrol issue. Essentials Mini Ball Valve 8mm x 8mm.urlhttps://www.screwfix.com/p/essentials-mini-ball-valve-8mm-x-8mm/26184 John. Quote Link to post Share on other sites
Drewmotty Posted October 26 Report Share Posted October 26 I use these from Toolstation. It mounts neatly on the inner face of the chassis where it can be quickly accessed through the rear wheel arch. Quote Link to post Share on other sites
Z320 Posted October 27 Report Share Posted October 27 Hi, I emptied the tank and fitted a motor cycle fuel tap in front of the pump. Also good to swap the pump next to the road, it it fails surprisingly (never on my TR). Ciao, Marco Quote Link to post Share on other sites
William Marsh Posted October 27 Author Report Share Posted October 27 Thankyou for the responses. Lots of different suggestions. I might go for the option of fitting a motor cycle tap but can't make up my mind now about fitting a filter. I quite like the glass ones because you could then visually note any rust, etc coming from the tank. Quote Link to post Share on other sites
RobH Posted October 27 Report Share Posted October 27 Some after-market glass filters are known to be prone to blockage and breakage. As I said before - you don't need one because the strainer and glass bowl on the mechanical pump do the job perfectly well. After all, that is why it is there. Quote Link to post Share on other sites
harlequin Posted October 27 Report Share Posted October 27 I removed the inline glass filter on my TR3A because I found that the nylon filter element was swelling in hot weather and restricted fuel supply. Mine was mounted just before the carbs, it seemed to be OK with engine heat but as soon as we had a hot day fuel supply was reduced to a point where the car would cut out. George Quote Link to post Share on other sites
Z320 Posted October 27 Report Share Posted October 27 I had a brakedown with a inline glas filter 4 years ago at France. That cost me lots of nerves and trust in my TR. Problem was, it was blocked by dust, not visible but blocked! The filter of the mechanical fuel pump is good enough, nothing more is needed for the very simple 1 jet SU carbs. Ciao, Marco Quote Link to post Share on other sites
harlequin Posted October 27 Report Share Posted October 27 55 minutes ago, Z320 said: I had a brakedown with a inline glas filter 4 years ago at France. That cost me lots of nerves and trust in my TR. Problem was, it was blocked by dust, not visible but blocked! The filter of the mechanical fuel pump is good enough, nothing more is needed for the very simple 1 jet SU carbs. Ciao, Marco Agreed its just something else to go wrong for no great benefit George Quote Link to post Share on other sites
William Marsh Posted October 28 Author Report Share Posted October 28 All points noted, so I won't bother fitting a glass filter. A valid point that it is one more thing to go wrong!! Quote Link to post Share on other sites
tim hunt Posted October 28 Report Share Posted October 28 On 10/26/2024 at 10:13 PM, Drewmotty said: I use these from Toolstation. It mounts neatly on the inner face of the chassis where it can be quickly accessed through the rear wheel arch. Does this mean that an 8mm ID olive is close enough to a 5/16" (7.94mm) OD fuel pipe to guarantee no leaks? Quote Link to post Share on other sites
stuart Posted October 28 Report Share Posted October 28 Just now, tim hunt said: Does this mean that an 8mm ID olive is close enough to a 5/16" (7.94mm) OD fuel pipe to guarantee no leaks? Yes by the time its squeezed up then its fine. Stuart. Quote Link to post Share on other sites
Drewmotty Posted October 28 Report Share Posted October 28 7 hours ago, tim hunt said: Does this mean that an 8mm ID olive is close enough to a 5/16" (7.94mm) OD fuel pipe to guarantee no leaks? There’s only about 0.0025” difference. Quote Link to post Share on other sites
PaulAnderson Posted October 28 Report Share Posted October 28 Or if you’re feeling flush then you can buy a fuel pipe complete with tap from Revington TR Quote Link to post Share on other sites
Z320 Posted October 29 Report Share Posted October 29 141.80 GBP? Quote Link to post Share on other sites
harrytr5 Posted October 29 Report Share Posted October 29 Around £14 for italian made full bore (10mm) fuel tap. Just love these and have fitted a few. I/4 BSP Fuel tap and adapter to i/2" UNF to connect to tank and in my case to pipe work i/4 BSP male to Jic 7/16" male. https://www.ebay.co.uk/itm/263623144871?mkevt=1&mkpid=0&emsid=e11051.m43.l1123&mkcid=7&ch=osgood&euid=d08097e46aad4df0b41d35544ab0e84b&bu=43689519700&osub=-1~1&crd=20241028042313&segname=11051 They are out of stock and 2-3 weeks before they are back in stock (I hope) Regards Harry Quote Link to post Share on other sites
Z320 Posted October 29 Report Share Posted October 29 (edited) I fitted a motorcycle or lawn mower fuel tap für 10 €uro, cut, plug and ready. Edited October 29 by Z320 Quote Link to post Share on other sites
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