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May 17, 2009 2:15 pm
May 17, 2009 2:15 pm
Subject: New fibre timing gear too tight in mesh!
Hi...I bought 2 new gears (1 & 1 spare) for my V12 around 1980. Now the engine is finally being rebuilt, the guy tells me he's tried both in place, & that they're so tight in mesh, he's reluctant to use either of them. He says he's heard that in certain circumstances, fibre (tufnol) can "grow".
Main question has to be...is tight mesh likely to be an issue, or will it bed in quickly with use, to good tolerances?
I understand duralumin replacements are available...however this is a late Sanction 2 engine, therefore fitted originally with a fibre gear, so it therefore doesn't have spray bars fitted to lubricate these gears (as the Sanction 1 engines with bronze intermediate gears did). Also reluctant to fit metal gear because of extra noise, & also like the fact that a fibre gear will strip before anything else breaks!
So...any thoughts/advice gratefully received!
Hi...I bought 2 new gears (1 & 1 spare) for my V12 around 1980. Now the engine is finally being rebuilt, the guy tells me he's tried both in place, & that they're so tight in mesh, he's reluctant to use either of them. He says he's heard that in certain circumstances, fibre (tufnol) can "grow".
Main question has to be...is tight mesh likely to be an issue, or will it bed in quickly with use, to good tolerances?
I understand duralumin replacements are available...however this is a late Sanction 2 engine, therefore fitted originally with a fibre gear, so it therefore doesn't have spray bars fitted to lubricate these gears (as the Sanction 1 engines with bronze intermediate gears did). Also reluctant to fit metal gear because of extra noise, & also like the fact that a fibre gear will strip before anything else breaks!
So...any thoughts/advice gratefully received!