Valve Seats and Lapping

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  #1  
Old 08-17-04, 08:02 PM
kelliew41
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Valve Seats and Lapping

I am working on a B&S 5 HP aluminum cylinder engine. There was no compression at all when I pulled on the starter. (No resisitance on pull)
I came to the conclusion after pulling the cylinder head plate that the valves needed to be replaced because they were worn and badly burnt. I got the old valves out and fit the new ones into place. After cleaning the seats real good, I found that there is a small chunk out of the intake seat. This may be a source of leaks. I am not sure how to fix it.

I don't know how to remove the seat or peen it back into place.
Is this a hard process without any specialized tools?

Can valve lapping be done instead of seat replacement?
What is the best lapping product and procedure?

Thanks,
Kellie
 
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  #2  
Old 08-17-04, 11:58 PM
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Hello Kellie!

An automotive machine shop would be the best bet for this kind of work. I hate to say, but if the engine was worn badly enough to have worn out valves, it is probably worn out everywhere (cylinder, rod, piston, rings, possibly crankshaft journals).
 
  #3  
Old 08-19-04, 04:23 PM
kelliew41
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Thanks for info. I don't think I am ready to attempt a rebuild yet.
 
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