Nivlek2525 Posted November 20, 2020 Share Posted November 20, 2020 (edited) Hi all, following on from my piston ring questions I have another issue. I've put everything back together and got the cylinder head back on. To get a feel for what kind of compression I might get when I run it I turned the engine over by hand with the compression tested on each cylinder. I could get about 70psi on 1, 3 and 4 but struggling to get much at all on 2. This just happens to be the cylinder with the biggest ring gap so I assumed it was that. I poured some oil down the bore and it's made no difference. So I taped up the inlet and exhaust ports with gaffer tape and turned the engine over again blocking the spark plug hole on each cylinder. Nothing on cylinder 1,3 and 4 again but 2 is blowing the tape off on inlet and exhaust. So I'm leaking from both valves. Head off again, all looks ok. I've taken the valves out they look well ground in. I spent quite a bit of time doing this months ago. So I've put the valves in a drill and when I spin them I think there might be a bit of a wobble suggesting they are bent. So my question is, are there any simple ways to check for bent valves? Why would both be bent? Is there anything else I can check. I'm tempted to bin it an keep an eye out for a unleaded head and crack back on with something else. All help, comments, thought, jokes and funny stories appreciate. Kelvin. Edited November 20, 2020 by Nivlek2525 1 Quote Link to comment Share on other sites More sharing options...
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