Finding TDC?

G_94_T

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Using the piston stop method...(cw mark,ccw mark)...the difference between the two readings ,im coming up with 10*btdc....shouldnt i be getting 0* for tdc


This is on a 94 5.0 mustang and the balancer is new aftermarket
 

96blak54

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Im not fond of the positive stop method, but you rotate to stop, record #, rotate opposite direction to stop, record number, then remove stop and rotate again and add half of what the diffrence was recorded
 
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G_94_T

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Thats what im om doing except the the third rotation.....?
 
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G_94_T

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The first time i got cw 20*btdc.....ccw 13*atdc....the middle of this is 9*btdc....not 0
 

kb1982

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My math keeps coming up around 3 to 4 degrees BTDC. 13+20 = 33 33/2=16 degrees. Take 16 from 13 and you get 3 degrees BTDC. Take 16 degrees away from 20 and that will leave you with 4 degrees BTDC. So in between 3 and 4 should be true TDC if your numbers were right. Could measure it with a tape measure (thank a tailor tape) from your measurements, then just divide that by half. Another easy way, lay down a piece of paper on the HB, make a mark with a sharpie on the paper corresponding with your 2 readings. Now just simply fold the paper until the 2 sharpie marks on the paper are alligned evenly. The crease fold will be exactly halfway between the 2 marks. It isnt real uncommon for the TDC mark to be off by a few degrees.
 
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G_94_T

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My math keeps coming up around 3 to 4 degrees BTDC. 13+20 = 33 33/2=16 degrees. Take 16 from 13 and you get 3 degrees BTDC. Take 16 degrees away from 20 and that will leave you with 4 degrees BTDC. So in between 3 and 4 should be true TDC if your numbers were right. Could measure it with a tape measure (thank a tailor tape) from your measurements, then just divide that by half. Another easy way, lay down a piece of paper on the HB, make a mark with a sharpie on the paper corresponding with your 2 readings. Now just simply fold the paper until the 2 sharpie marks on the paper are alligned evenly. The crease fold will be exactly halfway between the 2 marks. It isnt real uncommon for the TDC mark to be off by a few degrees.

thanks for the enlightenment kb
 

evilcw311

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Your all completely wrong. Just thought I'd let y'all know the correct way..........
b5b6bc190f6133c930805dcb8c465094.jpg



This message courtesy of crapatalk!
 

96blak54

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Now we're talking!!!

But his heads are bolted down.....he could use long cigarettes through the sparkplug holes?
 

96blak54

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True.....something slim and long to fit down the holes...hmmm.

I got it! Use tampons!
 

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