Does worn rocker shaft/rockers, cause noise

[daverclasper]

Not a problem as such, just interested, as I have read that it does and folk have cured noise on triumph engines by replacing, though have not found this personally.

My engine has always been quiet, though I replaced the shaft as very worn, with the oil scrolls nonexistant at the rear underneath and not supplying oil.

Wear in this area of shaft/rickers ,due to the spring tension I assume?. Also replaced some of the rockers with wear on bearing surface with better ones.

After this the rockers could be seen to be supplied with oil.

No difference at all in any engine noise that I could tell, which is what I assumed anyway, as any wear would be taken up and silenced by the spring pressure?

Ta 

 

[dougbgt6]

A worn rocker face can give a false gap reading with flat feeler gauges, leaving the gap too wide and noisy.  

Don't be tempted to install one of those "more oil for the rocker shaft" devices which merely  divert oil from the main bearings.

Doug

[Clive]

it can make a clattery sort of sound, and it is an issue that accelerates as it gets worse due to lack of lubrication. 

I have just recently noticed that new shafts and rockers are being sold that are bushed and toleranced, which seems a good idea. I just wonder if the quality is good?  Good condition used rockers on a new shaft would be my preferred choice though.

[daverclasper]

Thanks guys. The new shaft I fitted, was a £25 jobby a few years ago. Maybe done about 8000 miles since. Will check it's still supplying oil, when I get some time

[ahebron]

The one I rebuilt for my 1600 Vitesse was made up of the best of a bad bunch of parts as the one fitted to the engine was a bad mix of Mk2 and Mk1 rocker parts.
Yes the shaft is worn in places and the rockers are as well but with the correct gaps this is the quietest 6 cylinder Triumph engine I have ever heard.
It had me very worried and I have striped the rockers shaft down a couple of times and rebuilt the same way it came apart.
Rechecked the tolerances multiple times and it is always correct.
Probably jinxed it now and it will clatter like a clattery thing on clatter day next time I start it  🤪

[Pete Lewis]

and  a  mk2 shaft is too long to fit in a mk1/1600 rocker cover  had to modify the end cap on mine after swapping all the pedestals etc .

to make one out of a new  one size fits nowhere  one 

Pete