johny Posted July 21 Report Share Posted July 21 hmmm they two carbs should behave the same whatever you do... Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 Have you checked the balance of the two carbs? That is adjust the air flowing through each while the linkage between the two is undone then when equal the linkage is retightened... Link to comment Share on other sites More sharing options...
Carba1984 Posted July 21 Author Report Share Posted July 21 19 minutes ago, johny said: Have you checked the balance of the two carbs? That is adjust the air flowing through each while the linkage between the two is undone then when equal the linkage is retightened... I have checked the balance and I have it well but with the carburetters connected to each other, I do not see that it influences anything that is connected to each other when I check the air that flows Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 To be honest if the car is new to you I would check everything in this order so that you can discount all basic problems: Valve timing, valve clearances, cylinder compression, air filters, carb float levels, ignition timing and operation of distributor advance/retard, carb air balance and finally mixture adustment. Quite a lot of work but that way you know things are right and then if a problem still exists look elsewhere... 1 Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 Just now, Carba1984 said: I have checked the balance and I have it well but with the carburetters connected to each other, I do not see that it influences anything that is connected to each other when I check the air that flows ok you only need to undo them if theyre out of balance and adjustment is required👍 1 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 21 Author Report Share Posted July 21 5 minutes ago, johny said: To be honest if the car is new to you I would check everything in this order so that you can discount all basic problems: Valve timing, valve clearances, cylinder compression, air filters, carb float levels, ignition timing and operation of distributor advance/retard, carb air balance and finally mixture adustment. Quite a lot of work but that way you know things are right and then if a problem still exists look elsewhere... The engine has been rebuilt 800 kms ago, it should be all regulated, maybe it influences the idle that they have not settled yet, soon I will do head reappeting and valve adjustment, the distributor I think I have it well (17 BTDC) gives me good feelings, I don't know what you mean by valve timing Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 Valve timing is to see that the cam is in the right position relative to the pistons so that the valves open and close at the right times. With an overhauled engine from a reputable supplier this shouldnt be a problem👍 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 21 Author Report Share Posted July 21 Just now, johny said: Valve timing is to see that the cam is in the right position relative to the pistons so that the valves open and close at the right times. With an overhauled engine from a reputable supplier this shouldnt be a problem👍 It shouldn't be a problem, I think the problem is in the carburisation, I'll check everything and tell you. With the engine rebuilt, when should the head retighten and valve adjustment? I'm going to change oil now with 800 kilometres. Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 I would do it all at the same time as the oil change.... Link to comment Share on other sites More sharing options...
Carba1984 Posted July 21 Author Report Share Posted July 21 2 hours ago, johny said: I would do it all at the same time as the oil change.... And wich torque? the manual says 38 to 46, is it better to use something in between? 42? Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 As you dont know how accurate your torque wrench is yes best to go in the middle of the range... Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 22 Report Share Posted July 22 42 is a good call , on a retorque back each nut 1/2 turn and then retorque one at a time . the order is not overly important but you will have to remove the rocker shaft/pedestals to get on all the nuts then recheck the valve clearances after. Pete 1 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 24 Author Report Share Posted July 24 How to fit the cork seal? Should it be completely greased with car oil or installed clean? Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 If you mean the rocker box gasket I would go dry - youre always going to replace it next time so doesnt matter if it sticks. However now there are silicone seals available for some models which are reuseable... Link to comment Share on other sites More sharing options...
Iain T Posted July 24 Report Share Posted July 24 A lot of the time the rocker cover cork seal leaks mainly due to the pressed steel cover distorting over time. To ensure the cork to head side is flat I applied a thick coating of Hylomar Blue to the rocker cover pressing where the cork seal sits. After 10 minutes I then fitted the cork seal to the cover and put the assembly on a flat surface such as a kitchen top and put some weight on it for 30 minutes. The Hylomar will take up any variation in cover pressing and the cork to head side will be flat. I applied a very thin smear of grease to the head seal area before fitting. This procedure stopped my rocker cover from leaking. Good luck Iain 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 24 Report Share Posted July 24 silicone composite gaskets are available from some suppliers at extra costs . a full flat one is only for flat faced alloy covers I'm with the glue down with some good sealer but dont stick it to the kitchen table you could be in for some trouble at home ha ! Pete Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 Im using 6mm closed cell neoprene cord at the moment on my standard rocker box and it certainly seals ok. It could probably take 7mm and is a lot cheaper than a silicone jobbie but of course it remains to be seen what its like to remove😲 1 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 24 Author Report Share Posted July 24 On 22/07/2024 at 09:43, Pete Lewis said: 42 is a good call , on a retorque back each nut 1/2 turn and then retorque one at a time . the order is not overly important but you will have to remove the rocker shaft/pedestals to get on all the nuts then recheck the valve clearances after. Pete I have seen that it is 46 lb ft. according to the manual the head tightening Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 Can you guarantee that your torque wrench is accurate and youre not going over the maximum figure though? Link to comment Share on other sites More sharing options...
Carba1984 Posted July 24 Author Report Share Posted July 24 4 minutes ago, johny said: Can you guarantee that your torque wrench is accurate and youre not going over the maximum figure though? No 😓, maybe I can give it 1 or 2 Nm less Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 ok but dont mix up lb.ft and Nm😲 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 24 Author Report Share Posted July 24 Sorry! 😂 I use Nm always Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 ok so a nice round 6 Nm should be good👍 Link to comment Share on other sites More sharing options...
Carba1984 Posted July 24 Author Report Share Posted July 24 6 minutes ago, johny said: ok so a nice round 6 Nm should be good👍 6? 60! 😉 Link to comment Share on other sites More sharing options...
johny Posted July 24 Report Share Posted July 24 sorry yes the manual is kg m isnt it so 6 kg m is approximately 60 Nm😁 Link to comment Share on other sites More sharing options...
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