Determining top dead center
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The safest/easiest way to turn the crank is to use a tool that allows a large ratchet or breaker bar to be used. | The safest/easiest way to turn the crank is to use a tool that allows a large ratchet or breaker bar to be used. | ||
[[File:Crank turning tool.jpg|thumb|Damper-mounted crank turning tool]][[File:Crank turning tool2.jpg|thumb|Crank snout-mounted crank turning tool]] | [[File:Crank turning tool.jpg|thumb|Damper-mounted crank turning tool]][[File:Crank turning tool2.jpg|thumb|Crank snout-mounted crank turning tool]] | ||
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==Getting started== | ==Getting started== | ||
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| − | ==The | + | ==The procedure== |
Thoroughly clean the harmonic damper and timing pointer. | Thoroughly clean the harmonic damper and timing pointer. | ||
| − | + | *'''Optional procedure closed valves''' | |
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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At this point, we are not concerned with where the crank/piston is in the total 720 cycle of operation. In other words, we have the valves disabled, so it doesn't matter whether you are on the exhaust cycle or the compression cycle as the piston comes up to TDC. All we are working with at this point is the 360 degrees of the damper, regardless of the cam and valves. | At this point, we are not concerned with where the crank/piston is in the total 720 cycle of operation. In other words, we have the valves disabled, so it doesn't matter whether you are on the exhaust cycle or the compression cycle as the piston comes up to TDC. All we are working with at this point is the 360 degrees of the damper, regardless of the cam and valves. | ||
| − | + | *'''Procedure without removing valve cover''' | |
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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[[Category:Engine]] | [[Category:Engine]] | ||
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