Steven162 Posted April 12, 2015 Report Share Posted April 12, 2015 So, the scars on my hands, forearms, elbows, forehead, etc, are nearly heeled up, I can nearly stand up straight and move my arms properly and my hands are nearly clean after a weekend of removing my waterpump and then another weekend of putting it back on after it was refurbed. The car has been smelling of petrol a bit after a run so I ran my hand under the carbs, the front carb is wet with fuel underneath (wet, not dripping) with the engine off but the pump running, when I open and close the throttles with the cable between the carbs (again engine off but pump running, and pump off for a while) it drips fuel onto my fingers. There is no sign of fuel when looking at the top of the carbs. Any idea where to look on the carbs? I have the Hammil book which I will be reading while I work away next week and a Lotus workshop manual, just wondering if any body has seen this before. Car is 87 Turbo HC Thanks Steve Quote Link to comment Share on other sites More sharing options...
Paul Coleman Posted April 12, 2015 Report Share Posted April 12, 2015 When was the last time you replaced the accelerator pump diaphragms? Quote Lotus Esprit [meaning] a 1:1 scale Airfix kit with a propensity to catch fire Link to comment Share on other sites More sharing options...
gvy Posted April 12, 2015 Report Share Posted April 12, 2015 Same here. If those pump diaphrams are punched or leaking , the carb gets wet underneath. When was the last rebuild of your carbs? Geert Quote Link to comment Share on other sites More sharing options...
simon a-b Posted April 12, 2015 Report Share Posted April 12, 2015 I just did this on my rear carb. I took them off the car to do it, but I guess if you wanted you could do it in situ... the diaphragm is pretty easy to change, stopped my leak immediately. Don't need to emphasise the risk of leaking carbs on these cars! Quote Link to comment Share on other sites More sharing options...
Mike6 Posted April 13, 2015 Report Share Posted April 13, 2015 My later carb turbo had some leaks under the rubber 'o' rings where the carbs attach to the manifold. I would check these in the first instance. Quote Link to comment Share on other sites More sharing options...
Steven162 Posted April 18, 2015 Author Report Share Posted April 18, 2015 All fixed, 2 diaphragms from Eurocarb and a couple of hours work. I had to remove the diffuser, plenum backplate and plenum cover to get access to the lower carb mounting nuts but I had all this apart last year so it was OK. Those shiny trumpets that nobody sees! I did the front carb off the car and the rear one off the manifold but still connected by the throttle and choke cables. 20 miles and no leaks - thanks for the advise. Steve Quote Link to comment Share on other sites More sharing options...
Steven162 Posted April 28, 2015 Author Report Share Posted April 28, 2015 A bit of advice when doing anything with the carbs, if you disturb the link between the carbs, even by a small amount they will need re-balancing. I loosened one screw only when I removed the carbs and tightened it up (not fully!) when I refitted but on checking the balance there was at least 1 inch difference on my carbtune between the two. Its a very satisfying thing to do though! Quote Link to comment Share on other sites More sharing options...
molemot Posted April 29, 2015 Report Share Posted April 29, 2015 Speaking as the Devil's Advocate....how do you know the carbs were balanced before?(!) Quote Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein Link to comment Share on other sites More sharing options...
Steven162 Posted April 29, 2015 Author Report Share Posted April 29, 2015 I balanced them a few months ago!!! Quote Link to comment Share on other sites More sharing options...
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