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How do you know if the cam is on compression or discharge stroke?
Wiki User
∙ 11y ago
You can removenumber onespark plug, disconnect the coil wire from the distributor cap and ground it, stick your finger into the spark plug hole, have someone jog the starter gently, when air pushesby your finger you are on the compression stroke.
Another way if you are alone, is with the valve cover off you can turn the motor over by hand andactually see when the valves closed, and the harmonic balancer is at TDC/0 degrees.
Wiki User
∙ 11y ago
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#1 piston should be at TDC and both valves closed (compression stroke)
What stroke is the intake valve when the 1st cylinder is at top dead center when the points are matched up on the cam gear on a single over head cam on a 1995 dodge neon motor?
If all the timing marks are lined up it should be TDC compression.
Where should the lobes of the intake and exhaust cams be on number 1 cyl at tdc on 98 Mazda 626?
At TDC of the compression stroke for cyl #1, the cam lobes will be in a position such that they are putting no pressure on the valves, and valves are closed. At TDC of the exhaust stroke for cyl #1, the lobes will be in a position such that intake and exhaust valves may be open. Exhaust will be closing, and intake will be opening. There are two revolutions for the crank for one of the cam. TDC usually refers to TDC of the compression stroke, when valves are closed. This is when combustion/spark occurs, and is when the valves are adjusted on most engines.
How do you know if the timing marks on the cam pulley and the crank are on the right spots a Nissan ca20 twin coil motor the head has been rebuilt before you bought the car idling badly?
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