Jonny Posted May 31, 2020 Posted May 31, 2020 Hi all, I have noticted that my EFE engine is weeping oil from under the cyclinder head on one side. I swapped cylinder heads about 300 miles ago and it was fine for the first 150 miles or so. I figured that the head bolts would need retightening but they are torqued up to maximum (40 nm). I used a new Cometic gasket and the spray on copper sealant on both sides, and thought I'd made a good job of it. The head I used came from a runnnig bike I broke a few years ago. That was oil tight as I remember. I am planning to take the head off and take a look. Any thoughts on what I could have done wrong? Or anything I should look for when I open her up? Thanks, Jonny Quote
Gixer1460 Posted May 31, 2020 Posted May 31, 2020 There are 6No. O rings that seal the outer 4 studs and 2No at the front - did you replace these? As oil will be under pressure in these stud cavities so prime leak source. Quote
Jonny Posted May 31, 2020 Author Posted May 31, 2020 (edited) 1 hour ago, Gixer1460 said: There are 6No. O rings that seal the outer 4 studs and 2No at the front - did you replace these? As oil will be under pressure in these stud cavities so prime leak source. No I did not. I didn't find any reference to these. I've just had a look at the fiche and still can't see where they go. Can you tell me where they go? Thnaks, Jonny Edited May 31, 2020 by Jonny Quote
Gixer1460 Posted June 1, 2020 Posted June 1, 2020 Apologies - Brain Fart ! Completely missed the 'EFE' bit and assumed 1100 oil cooled ! ! ! Quite right the aircooled engine doesn't have them . . . . . . . . . . maybe they should LOL! Quote
Jonny Posted June 1, 2020 Author Posted June 1, 2020 1 hour ago, Gixer1460 said: Apologies - Brain Fart ! Completely missed the 'EFE' bit and assumed 1100 oil cooled ! ! ! Quite right the aircooled engine doesn't have them . . . . . . . . . . maybe they should LOL! Quote
johnr Posted June 2, 2020 Posted June 2, 2020 did you remember to use the dome headed nuts inside the cam cover and the plain nuts outside? and did you use new copper washers or anneal the old ones? Quote
Jonny Posted June 3, 2020 Author Posted June 3, 2020 23 hours ago, johnr said: did you remember to use the dome headed nuts inside the cam cover and the plain nuts outside? and did you use new copper washers or anneal the old ones? I got the bolts the right way round but I re-used the washers. Is it likely the oil is getting underneath them? Quote
johnr Posted June 3, 2020 Posted June 3, 2020 its a possibility but tbh a remote one. i reuse copper washers but always anneal them first. Quote
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