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if auto related it stands for top dead center and refers to the position of the crank in relation to the positon of the number one cylinder.

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Q: What does TDC mean?
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Rotor button want line up with number one tower at top dead center advance timing with harmonic balanicer lines up number one but 40 degrees before tdc car pops rich fuel runs rough new engine help?

You must be at TDC on the Compression stroke.


What is the compression ratio for an engine if each cylinder has a maximum volume of 500 cubic centimeters and a minimum volume of 50 cubic centimeters?

Compression ratio is exclusive to each cylinder, though they will all have the same result if they are the same dimensionally ( and they always are) > Divide the total engine capacity by the number of cylinders, this gives the capacity or swept volume of each cylinder (bore * stroke) > So in a 2.0 (2000 cc) litre 4 cylinder engine, each cylinder has a 2000 / 4 = 500 cc swept volume (bore * stroke) > The combustion chamber is the volume remaining at top dead centre (TDC) > Compression ratio = volume at BDC (swept volume + volume at TDC) / volume at TDC


What is the comparison of the volume of space between the piston's top surface and the top cylinder at BDC and TDC is called?

The answer is Compression Ratio. You should try reading the Study Unit it really helps!


Even If The Crank Shaft and Cam Shafts 3.0l 94 Chrysler Lebaron have timing marks Could you still be 180 degrees off and still end up with exhaust value open even though the number one piston is TDC?

yes, tdc is when the number one cylinder is a top dead center in the compression stroke, you may be at the top of the exhaust stroke. yes to correct this you need to remove distibuter and turn distributer shaft 180 degrees and then reinstall distributor


How do you tighten down hydraulic rockers to specifications without over tightening?

torque wrench Not with a torque wrench ! Obtain your proper specs (clearance and sequence at TDC for each corresponding valve) set the valves using the specs obtained and the proper thickness gauge .Tighten each rocker to valve clearance until you have a slight drag on your gauge between the rocker and valve.