Determining top dead center
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===Damper suppliers=== | ===Damper suppliers=== | ||
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*[http://www.damperdoctor.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=DD&Category_Code=HAR Damper Doctor] | *[http://www.damperdoctor.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=DD&Category_Code=HAR Damper Doctor] | ||
*[http://www.atiracing.com/products/dampers/index.htm ATI] | *[http://www.atiracing.com/products/dampers/index.htm ATI] | ||
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==Getting started== | ==Getting started== | ||
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Attach the degree wheel or refer to '''[[How To Make A Timing Tape]]''' or buy a timing tape that matches the diameter of the damper. Also buy or make a piston stop tool. Using a tool that has a hole drilled through the center of the probe will allow pressure or vacuum to escape through the hole from the piston moving up and down in the bore with the rocker arms disabled (valves on their seats). This makes turning the engine over w/the piston stop installed easier. | Attach the degree wheel or refer to '''[[How To Make A Timing Tape]]''' or buy a timing tape that matches the diameter of the damper. Also buy or make a piston stop tool. Using a tool that has a hole drilled through the center of the probe will allow pressure or vacuum to escape through the hole from the piston moving up and down in the bore with the rocker arms disabled (valves on their seats). This makes turning the engine over w/the piston stop installed easier. | ||
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===Water pump suppliers=== | ===Water pump suppliers=== | ||
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*[http://www.flowkooler.com/ FlowKooler] | *[http://www.flowkooler.com/ FlowKooler] | ||
*[http://www.stewartcomponents.com/ Stewart Components] | *[http://www.stewartcomponents.com/ Stewart Components] | ||
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==The procedure== | ==The procedure== | ||
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Thoroughly clean the harmonic damper and timing pointer. | Thoroughly clean the harmonic damper and timing pointer. | ||
===Procedure done with valves closed=== | ===Procedure done with valves closed=== | ||
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Remove the valve cover for #1 cylinder and back off the rocker arms for both valves for that cylinder. COUNTING THE NUMBER OF TURNS YOU LOOSEN THE ROCKER NUTS WILL MAKE IT A SNAP TO GET NEAR TO THE CORRECT LASH WHEN YOU TIGHTEN THEM BACK AFTER THIS OPERATION. | Remove the valve cover for #1 cylinder and back off the rocker arms for both valves for that cylinder. COUNTING THE NUMBER OF TURNS YOU LOOSEN THE ROCKER NUTS WILL MAKE IT A SNAP TO GET NEAR TO THE CORRECT LASH WHEN YOU TIGHTEN THEM BACK AFTER THIS OPERATION. | ||
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===Procedure without removing valve cover=== | ===Procedure without removing valve cover=== | ||
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If checking an assembled/long block engine, you will install a piston stop tool into #1 spark plug hole ([http://www.offroaders.com/tech/V8-engine-firing-order.htm domestic V8 firing orders]). Screw the top dead center housing into the spark plug hole and snug it down. Insert the probe of the tool into the tool housing and screw it in until you feel resistance of the tool probe against the piston crown. Snug it down slightly against the piston crown and start from there. | If checking an assembled/long block engine, you will install a piston stop tool into #1 spark plug hole ([http://www.offroaders.com/tech/V8-engine-firing-order.htm domestic V8 firing orders]). Screw the top dead center housing into the spark plug hole and snug it down. Insert the probe of the tool into the tool housing and screw it in until you feel resistance of the tool probe against the piston crown. Snug it down slightly against the piston crown and start from there. | ||
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==Timing the engine== | ==Timing the engine== | ||
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Hook up your timing light to #1 plug wire. | Hook up your timing light to #1 plug wire. | ||
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If you are using a radical cam and/or a converter that allows the engine RPM to come up past where you would normally limit centrifugal advance (about 2800 rpm), you may want to modify the distributor so that centrifugal advance is locked out and put your total amount of ignition advance in at the crank. Of course, the engine will not want to crank against this much ignition lead, so you will want to install a momentary switch in the wire going to the "+" terminal of the coil to disable the coil while you crank the engine. Once the engine is spinning, release the switch and the engine will fire normally. | If you are using a radical cam and/or a converter that allows the engine RPM to come up past where you would normally limit centrifugal advance (about 2800 rpm), you may want to modify the distributor so that centrifugal advance is locked out and put your total amount of ignition advance in at the crank. Of course, the engine will not want to crank against this much ignition lead, so you will want to install a momentary switch in the wire going to the "+" terminal of the coil to disable the coil while you crank the engine. Once the engine is spinning, release the switch and the engine will fire normally. | ||
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==Resources== | ==Resources== | ||
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