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Ok thanks a lot for your help. I already changed the injector with a new OEM one and the old one looks quite OK to me (1500h since the last injector setting check). I think the cylinder is fine, maybe so deposit in the exhaust manifold. I removed the exhaust manifold for the last time 2000h ago...

Thanks for that! I hope you are right!

Hi all, Small update on the work. I removed the glow plugs and turns the engine by hand. I got only some squeezing noise coming from every cylinder from time to time, nothing specific from the 5th one. Nothing alarming I found rotating the engine without compression, no hard point, no strange...

Lol, it would have been easier if I had trouble with cylinder n3, we wouldn’t care of which gearbox we are talking… Anyway thanks for the precision!

Yes yes cylinder n5 is the one near the gearbox / turbocharger, at least on my workshop manual!

I install a brand new OEM injector and I also changed the heat seal and the ring injector gasket… I can still try another cylinder but I am pretty sure fuel injection is fine. I don’t think my inline injection pump can suffer a one line break down. And the engine doesn’t smoke at all without or...

Thanks for your reply. I first thought it was a fuel knock so I already put a brand new fuel injector on the 5th cylinder and the noise still there. The noise appears quiet low-pitched and doesn’t sound like a metal to metal sound. Another clue, when I tried to adjust valve clearance on the 5th...

Hi all, I have a question regarding a Kubota F2503 knocking noise on the 5th cylinder. The engine is on a boat but there is no such forum on Kubota for boat! The engine is 6000 hours. I had a small knocking noise since nearly +/- 1000 hours but it was very small so I didn't do anything as it's...