Question to engineers/mechanics

Angleochoas

Angleochoas

Quantum Scribe
I once heard someone mention that International Standards Organization Metrics used in valve systems (engines) cause alot of internal friction...
What's with that?

(I figured he must have meant that because isometric shouldn't cause 'knocking' if you even used that term in this context, and it seems in terms of valve systems it's more commonly used to refer to the view).
 
Angleo,

Do you have a URL that we can look at to see what, exactly, you're referencing?

Somehow I'm thinking that you might be confusing International Standards Organization (ISO) with isometric and/or isothermal. ISO sets metric standards for many industries so that everyone is on the same page with such things as production standards and tollerances, i.e. all manufactures of metric screws use one consistent ISO standard for thread design.
 
Someone tried to say that 'isometric' valves caused a 'ting' sound in a motorcycle engine.
I was just trying to make sense of it - hence the supposing ISO metric as well, because neither way made sense in the context I overheard. I was just curious if there was something I didn't know that would attribute to that...from RMT's response as well, sounds like 'a grain of salt' conversation perhaps.
I don't think the question made sense in the context overall, as it was used when I heard it.
 
that ting sound is the valve/valves tapping. the rocker arms need to be adjusted with a feeler gauge. refer to the specific hanes manual for the model to find the thickness.
 
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