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turn your crank until the number one piston is at the top , u can check this by taking out the number 1 plug and stick a crew driver in to fill the piston at the top,then make sure your crank is lined up two dots next to each other and your router mark is set on the number 1 spark plug wire. this should put u in time. Tjohnson

Replacing a timing chain on a small block Chevy The dot on the cam will be at 6 o'clock the dot on the crank will be at 12 o'clock the dot will line up with the chain and sprocket installed correctly .When this is done the engine will auto maticly be at top dead center. If you are doing this chain and gears in the vehicle and don't have the oil pan removed,you will have to modify the timing cover;the groove on the bottom that fits the oil pan gasket needs to be trimed at the inside top of the lip diagnal about a 1/4 " both sides.This clearances the cover to slip past the pan,it still won't be easy,I use a beed of sillicone in the groove and glue the cover gasket to the cover with contact cement or trim adhesive,then i take two #1 Philips screw drivers,start the cover bottom groove on the pan,take the two Phillips put one through a bolt hole on each side of the cover and in the coresponding hole in the block push downd on the screw driver while pushing in on the timing cover until it slide over the pins, put all the bolts in tighten then install the crank seal.

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Q: How do you set the timing marks on a Chevy cam and crank?
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