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LEARNED SOMETHING TODAY


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#1 farmer john OFFLINE  

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Posted April 24, 2015 - 07:15 PM

Well I learned something very useful today, on an earlier post I had no compression on a briggs motor. pulled the head on found the cylinder to look good, so I determined it was the valves, a friend came over and showed me how to lap valves, its very easy and with the minimum of tools and hardly any time, I wonder how many motors have been scrapped for such a simple repair, I will look a lot closer at motors that I feel don't have a lot of compression from now on, john
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#2 boyscout862 ONLINE  

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Posted April 24, 2015 - 07:47 PM

 Did you adjust the lash too? I've found the exhaust valve stuck on several engines. A small bent rod through the spark plug hole can free them up.  A little Marvel Mystery oil in the gas helps to keep it all clean and reduce corrossion. Good Luck, Rick 


Edited by boyscout862, April 24, 2015 - 07:48 PM.

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#3 LilysDad ONLINE  

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Posted April 24, 2015 - 08:02 PM

In the early days of autos, lapping the valves was a frequent job.


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#4 superaben OFFLINE  

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Posted April 24, 2015 - 09:50 PM

In the early days of autos, lapping the valves was a frequent job.

 

They even had special machines and shops dedicated towards doing it.

 

It is a lost art now. 

 

Ben W.



#5 ol' stonebreaker ONLINE  

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Posted April 24, 2015 - 10:38 PM

Hydraulic lifters and valve rotators eliminated the need for it.
Mike

#6 1oldbuzz OFFLINE  

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Posted April 25, 2015 - 12:38 AM

Hydraulic lifters and valve rotators eliminated the need for it.
Mike

And then you had sunken valves

and they put the blame on unleaded fuel






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