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valve clearance
Posted: Sun Jan 31, 2010 6:23 pm
by blackstack
On page 142 of the Operating Instructions book, in the explanation of finding TDC it uses the term"....valves must overlap" What does this mean???
Thanks
Posted: Sun Jan 31, 2010 9:59 pm
by pinzinator
Both valves are open at the same time, this happens at TDC of the exhaust stroke.
Valve job vocabulary
Posted: Mon Feb 01, 2010 7:43 am
by blackstack
Thanks!!
Posted: Mon Feb 01, 2010 10:18 am
by David Dunn
pinzinator wrote:Both valves are open at the same time, this happens at TDC of the exhaust stroke.
Actually, when they're closed.
The top of the compression stroke .
TDC is the basic reference for setting ignition timing on the compression stroke..... for instance, if you hear 6 degrees before top dead center (BTDC) , the timing is set to ignite the spark 6 degree before the compression cycle is complete (TDC).
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clarify my understanding
Posted: Mon Feb 01, 2010 2:48 pm
by blackstack
From page 142 of Operating manual...(paraphrasing)To set valves of #1 cylinder crank engine till both valves of #4 are open etc.....is my understanding of statement correct?
Re: clarify my understanding
Posted: Mon Feb 01, 2010 3:18 pm
by David Dunn
blackstack wrote:From page 142 of Operating manual...(paraphrasing)To set valves of #1 cylinder crank engine till both valves of #4 are open etc.....is my understanding of statement correct?
With your last statement, then Pinzinator's statement is correct.
When both vlaves of #4 are in a open position when #1 are closed, and ready for adjustment.