Posted by Guido on January 02, 2009 at 09:29:37 from (96.235.128.84):
In Reply to: Timing Question. posted by Guido on December 30, 2008 at 05:40:01:
Engine theory of operation is just that.... THEORY. Here is a sequence for timing a 4cycle engine with a distributor type ignition. First step of timing an engine is to turn the CRANCKSHAFT! to position the piston on the cylinder the engine is timed to, (NOT ALWAYS #1). Second step is to TIME the camshaft to the CRANCKSHAFT!. If the cam needs to be checked for proper timing the engine heads will have to be installed, and any other componet that may be required to perfom the test,( push rods rocker arms). The next step, would be to time the distributor to the cylinder that is used for the engine timing driven by the camshaft that is timed to the CRANCKSHAFT!, (NOT ALWAYS #1) The camshaft will open the engine valves in sequence/ TIME in respect of piston position controlled by the CRANSHAFT!. It will also controll valve overlap/ openings in degrees of of CRANCKSHAFT rotation. After the engine is started, the timimg needs to be checked and when you hook up the timing light you point the strobe light at ......................the CRANCKSHAFT!!!!!! If there are any variance in a paricular engine timing,follow the engine manufacturer requirents.
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