Valve lubrication

[Tim L]

Hi all,
Should I lubricate the valve stems when I re-assemble my cylinder head. I am using the original valve guides and valves.
Tim.

 

[tonytorque]

Hi all,
Should I lubricate the valve stems when I re-assemble my cylinder head. I am using the original valve guides and valves.
Tim.

Does the pope shit in the woods!!

 

[Tim L]

I don't know, I think they have toilets in the Vatican.
The stems were dry when I removed the valves so I thought they might be hardened and run without lubricant.
How does the valve stem get lubricated during normal engine running?

 

[5twins]

I think a very small amount of oil gets by the guide seals, enough to lube the guides. Yes, oil things up during assembly.

 

[1974jh5]

Definitely oil the valve stems. The stem seals do allow a very small amount by so that the stems are lubricated. For years, the conventional wisdom was if you used bronze guides you ran without seals because they needed a lot more oil than iron or steel guides, dunno if that's still true.

 

[rayth]

Guys
Would anyone have a chart that shows the engine oil flowpaths please

 

[jd750ace]

Just in case this does not work exactly right, it's on page 20 of the pdf file at the top of the page (the suppliment)

http://biker.net/650_service/650service main.html

 

[gggGary]

 

[flake50]

Informative thread. now it clear me too what I was looking for...