JohnD Posted March 17, 2023 Report Share Posted March 17, 2023 I used to have one of those. It cracked. Link to comment Share on other sites More sharing options...
Puglet1 Posted March 17, 2023 Author Report Share Posted March 17, 2023 22 minutes ago, JohnD said: I used to have one of those. It cracked. Whoops! That’s food for thought 👍 Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 17, 2023 Report Share Posted March 17, 2023 on the subject of power loss and stopping apart from the hose problems do check the HT coil is wired correctly neg to dizzy ign feed to positive when reversed gives a run stop get out swear abit and it restarts till it stops again easy to check Link to comment Share on other sites More sharing options...
Puglet1 Posted March 17, 2023 Author Report Share Posted March 17, 2023 1 hour ago, Pete Lewis said: on the subject of power loss and stopping apart from the hose problems do check the HT coil is wired correctly neg to dizzy ign feed to positive when reversed gives a run stop get out swear abit and it restarts till it stops again easy to check Hi Pete. I have checked the wires going to the ign coil as suggested. I think it has Accuspark fitted? The coil is fed from the dynamo and a wire from each side of the coil leads to the distributor. I have attached some photos, what do you think? Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 17, 2023 Report Share Posted March 17, 2023 white and red to the Pos black dizzy to neg thats correct does look like an accuspark kit in a lucas "5D6 Dizzy dont think you are right about the feed from the dynamo and if it is it needs correcting the small term on the dyno is the field winding feed , would want to interfere with its passage to the control box the white you see should run into the harness and up to the Ign switch nothing to do with the dynamo Pete Link to comment Share on other sites More sharing options...
Puglet1 Posted March 17, 2023 Author Report Share Posted March 17, 2023 22 minutes ago, Pete Lewis said: white and red to the Pos black dizzy to neg thats correct does look like an accuspark kit in a lucas "5D6 Dizzy dont think you are right about the feed from the dynamo and if it is it needs correcting the small term on the dyno is the field winding feed , would want to interfere with its passage to the control box the white you see should run into the harness and up to the Ign switch nothing to do with the dynamo Pete Pete. I have just experienced something that’s completely new to me😀You were right about the wires from the dynamo! (Can’t believe I was wrong and still trying to get over the shock). Anyway things seem to be okay coil and distributor wise so I’ll continue with the fuel system as soon as time allows. Thanks again. Pete Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 17, 2023 Report Share Posted March 17, 2023 we dont want you getting any SHOCKs 3 minutes ago, Puglet1 said: over the shock 1 Link to comment Share on other sites More sharing options...
PeteH Posted March 17, 2023 Report Share Posted March 17, 2023 (edited) School chemistry lab, 1950’s? “Just hold these two bits of wire?.”😁 Pete Edited March 17, 2023 by PeteH 1 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted March 17, 2023 Report Share Posted March 17, 2023 3 hours ago, PeteH said: School chemistry lab, 1950’s? “Just hold these two bits of wire?.”😁 Pete Famous last words in many an upstairs room in Belfast back in the day, too. 1 Link to comment Share on other sites More sharing options...
Puglet1 Posted March 17, 2023 Author Report Share Posted March 17, 2023 So. Today, I have cleaned out the metal fuel pipes using strimmer cord and compressed air - seemed ok. I have checked the fuel tank and pickup tube- also ok. I have replaced the rubber hoses which sit between the fuel tank up to the PO glass in-line filter, they were all rigid and cracked. I removed the glass filter to lean it and noticed it had been fitted the wrong way around- now cleaned and refitted in correct orientation. Went to replace the hose between the glass filter and fuel pump, it had a very sharp kink in it near the fuel pump. The same hose was also leaking at the pump end. When I removed it, it appeared to 8mm diameter (same as the hoses previously mentioned). Looking at the inlet tube on the fuel pump, it looks like 6mm in diameter. I can fit a 6mm hose between the glass filter and pump but thought it might restrict petrol delivery to the pump. Is this normal? Is there such a thing as a 8mm pipe and adapter that I can screw into the pump? Pete Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 17, 2023 Report Share Posted March 17, 2023 to convert you need a 5/16 unf sleeve nut and a bit of 5/16" pipe and olive you can get screw in hose connectors but not checked they are 5/16 x24 unf thread if original car builder solutions good for all thes odds and sods good for a read if you order a catalogue New Products | Car Builder - Kit & Classic Car Parts Specialist Link to comment Share on other sites More sharing options...
Puglet1 Posted March 17, 2023 Author Report Share Posted March 17, 2023 46 minutes ago, Pete Lewis said: to convert you need a 5/16 unf sleeve nut and a bit of 5/16" pipe and olive you can get screw in hose connectors but not checked they are 5/16 x24 unf thread if original car builder solutions good for all thes odds and sods good for a read if you order a catalogue New Products | Car Builder - Kit & Classic Car Parts Specialist Thanks Pete👍 Link to comment Share on other sites More sharing options...
Puglet1 Posted March 24, 2023 Author Report Share Posted March 24, 2023 New 5/16 copper pipe, olive and union arrived and fitted today . (Along with the other actions taken as described in this thread). Car started and immediately sounds and feels better. It will actually tick over now - which it didn’t before. The car is still on 4 axle stands until early next week so cannot confirm if it’s running properly. I checked the ignition timing using a strobe light. It is currently set at 8deg @ 800rpm. Will check the valve clearances and basic carb setup before the test drive. I’m hoping to come back from the test drive with a smile on my face but if the saga continues, I will be looking for suggestions. 🤞 Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 24, 2023 Report Share Posted March 24, 2023 dont forget to remove the axle stands !!!!! 1 Link to comment Share on other sites More sharing options...
Puglet1 Posted April 2, 2023 Author Report Share Posted April 2, 2023 I have removed and checked the fuel tank, renewed and cleaned the fuel hoses as far as the fuel pump. I also found kinked pipes and massive air leaks prior to the pump which has also been resolved. The car started and idled perfectly- which it didn’t before. Today, I took the car for its first drive since completing the work. I drove 7 miles to the filling station and took it up the rev range no problem. I filled with bp ultimate fuel, drove for 2 miles and the car lost power as originally experienced 🙁. I stopped the car and for approximately 20 minutes it wouldn’t start again. When it eventually started, we nursed it home. Amongst the spares the PO gave me is a new fuel pump so I will fit that. I am thinking of cleaning and replacing the fuel pipes from the pump to the carbs and also removing and checking the carbs. Any suggestions welcome. What do you think? Pete Link to comment Share on other sites More sharing options...
Puglet1 Posted April 2, 2023 Author Report Share Posted April 2, 2023 (edited) I have also removed the additional oil feed pipe and checked the oil supply to the rocker shaft which was ok. After starting the engine I thought I’d check the oil supply with the engine running. I removed the oil filler cap from the rocker cover and noticed it was difficult to get off due to what seemed like a negative pressure (suction). Is this normal? Do you think this could affect my problem? Thanks. Pete Edited April 2, 2023 by Puglet1 Additional Questions Link to comment Share on other sites More sharing options...
NonMember Posted April 3, 2023 Report Share Posted April 3, 2023 9 hours ago, Puglet1 said: I removed the oil filler cap from the rocker cover and noticed it was difficult to get off due to what seemed like a negative pressure (suction). Is this normal? Some negative pressure is normal but it shouldn't be very much. Which crankcase breather arrangement do you have? There should be a rubber hose from the rocker cover - where does it go? Link to comment Share on other sites More sharing options...
johny Posted April 3, 2023 Report Share Posted April 3, 2023 Yes the free to download workshop manual shows the arrangement you should have including the pressure control valve and its maintenance👍 Link to comment Share on other sites More sharing options...
Puglet1 Posted April 3, 2023 Author Report Share Posted April 3, 2023 NonMember / johny. The hose from the rocker cover is connected to a crankcase breather as shown in the workshop manual on page 1-310 Fig 19. I have not disassembled it yet but will do later today. The amount of force required to remove the rocker cap whenI first attempted it was massive (I thought the cap was seized into the rocker box). I’m not sure if this will have had an impact on the engine cutting out but I guess it should be my next step? Link to comment Share on other sites More sharing options...
johny Posted April 3, 2023 Report Share Posted April 3, 2023 Have you got the standard rocker box cap (shown in the same manual picture) as this is vented so should prevent any strong neg pressure? However I dont think this will affect engine running much as it just means less air/gas will be supplied to the manifold via the pcv so mixture might be slightly richer.... Worth opening up pcv as this is routine maintenance to clean, check diaphragm and free movement of components👍 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 3, 2023 Report Share Posted April 3, 2023 sounds like the PCV diaphragm is holed and you get full uncontrolled manifold vacuum in the crankcase easy to check flip the wire clip and pop the lid off temp repair can be poly bag of pvc glove to get you home Pete Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 3, 2023 Report Share Posted April 3, 2023 typical case of small errors can have big effects Pete Link to comment Share on other sites More sharing options...
NonMember Posted April 3, 2023 Report Share Posted April 3, 2023 55 minutes ago, Pete Lewis said: sounds like the PCV diaphragm is holed If there's a significant leak into the PCV - and that includes a holed diaphragm with the filler cap off - then you get a really lean mixture and refusal to idle. Unless, of course, the carbs are set pig rich, in which case you may get a wildly high idle. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 3, 2023 Report Share Posted April 3, 2023 the pcv should only lift when crank case pressure is detected the manifold vacuum is used to remove the pressure till its less then the valve closes the manifold off till next time and so on as a continuous operation of open and closures if its holed or jammed it will suck the crankcase all the time and that keeps your filler cap sucked in place till you stop the engine its a cheap fix Pete Link to comment Share on other sites More sharing options...
Puglet1 Posted April 3, 2023 Author Report Share Posted April 3, 2023 I have disassembled the pcv. The order the parts originally sat in after removing the top plate from top to bottom was 1. Diaphragm. 2. Large plate with spindle going downward. 3.Large spring. 4. Orifice plate. 5. Small spring. 6. Plate valve with 3 tabs facing upwards…. See photo. Looking at the manual, I think the order should be the same as above from 1-4 followed by No.6 the valve plate with 3 tabs facing downwards and finally the small spring at the base of the pcv. See 2nd photo. What do you think is correct assembly order? Link to comment Share on other sites More sharing options...
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