Posted by KEB1 on December 25, 2008 at 18:25:25 from (63.231.76.249):
In Reply to: Re: My W6 won't run posted by trutherf on December 25, 2008 at 18:00:19:
Actually, there are 8 valves, two per cylinder. How do you know the valves are "stuck"? Did you take the valve cover off and watch them move? The distributor/magneto drive off the cam gear, so if you have spark the cam gear is turning.
Do you have compression? Even putting your thumb over each spark plug hole will tell you if there's any compression at all.
Did you check to see if the ignition timing is close, i.e, spark occurs close to top dead center on each cylinder?
Start with the basics. An engine needs fuel, spark and compression in the right sequence in order to run.
Not sure what you mean by "a spark plug has gas leaking from it". Is the plug loose in the cylinder? Otherwise, there's no way for fuel to get from the cylinder to the outside of the plug unless the plug itself is broken.
Post the results of some very basic tests, and we'll go from there.
1. Do you have compression, even enough to feel with a finger over the spark plug hole? Are all four cylinders the same?
2. Assuming you have spark at each cylinder, does it occur about the same time as the piston is at the top of its travel. Watch piston travel as someone else described, and note the position of the piston when the spark for that cylinder occurs.
3. If you have low or no compression, pull the valve cover and watch for rocker motion as you crank the engine. If you have good compression, the valves are functioning and can't be "stuck".
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