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A little long here but stick with me.
My advice here, is not to use a dead stop to find TDC. Use the dial indictor you will use to find full lift on the valve. Dead stops tip the piston some and on many of these 2V engines the dead stop will be cantered and the domes are uneven.
This should be done before the cylinder head is installed. Bring the head up to TDC and zero out the dial indictor. Zero out the pointer on the degree wheel too. Then carefully turn the engine backwards, around half way between BTD and TDC. Then turn it clockwise until the dial indictor shows say, 0.020" before TDC, (0.50mm) and record the degrees before TDC on the degree wheel. Then turn the engine through TDC until 0.020" ATDC, (0.50mm) and record this number. Add together and divide by 2. This is true TDC removing any piston dwell. You may have to reposition the pointer to the new zero TDC mark on the degree wheel.
Not sure what the metric dial indictor may read, but I hope you get the idea. It doesn't matter where you stop before zero on the indictor as long as you do the same on the other side of zero. You are splitting the difference here.
This should be done exactly the same way when degree'ing in the cams. If the cam card suggests 114° ATDC for the intake lobe centerline, carefully turn the cam to full lift and the crank to 114°. Be carful here as you may have some piston interference until you go over TDC with the piston.
Put you dial indictor pointer on the spring retainer and zero it out at full valve lift. Lock the cam bolt snug and do the same as you did when TDC'ing the pointer. Turn the engine backwards carefully and back clockwise and stop the indictor at 0.020" before zero on the dial and record the degree # on the crank. Turn past TDC to 0.02" and record this number. Add both together and divide by 2. This will then be the actual intake lobe centerline.
The same can be done if its easier, when the Intake cam lobe is fully open, (valve closed) engine would be 114° past TDC on the compression stroke. You would place a flat disc pad type pointer on the nose of the Intake lobe and instead of measuring the lobe at full open lift, you will be measuring the intake lobe at full valve closed, or 180° cam degrees opposite to the above way. As long as you time the 4-5-6 side the same, you are timing the cams 360° "away" 180° cam degrees "away". Exact same cam positions just often easier to find a good position for the dial indictor to show zero.
I used 0.020" as an example here. Not sure what a metric dial face will show. Just pick a number each side of zero on the dial face. This will degree in your cams a lot more accurately than doing the lift at TDC method. You can test each lobe for the same centerlines, the lobe separation angles and each lobe lift. You may be very surprised at the in accuracies of your cams.
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