[Vwdiesel] Valve talk for beginners ---- (to lap or not to lap ?)
h_hagar at prcn.org
Tue Sep 21 12:48:30 EDT 2004
I am not a mechanic -- (auto) or ever was. so this is IMHO stuff.
I read every word on this in the threads. Here is my experience :
Loren is right grinding is best --- but I have had really good experience with
the old stick and a suction cup. So for a second choice use fine compound
and do not over do it.
If you look in your Bentley you will see that the seat and the valves are ground
at a different angle. That means that the contact is a fine line.
Try to get the line somewhere near the middle of the seat.Or where specified.
Now in hand lapping that contact line becomes much wider , but not to worry it works
just fine. Hell of a lot better than NO lapping.
On the VW the valve clearance HOT is critical . So test.
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