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Old 01-24-2010, 12:35 PM   #1
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Default crank pin size v-spec?

does any one know the size of the crank pin new on a vspec? trying to decide wether or not to replace just the rod or rod and crank both
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Old 01-24-2010, 01:09 PM   #2
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The factory is .196 and the tolerance is -.003

If your crank pin is at .193 with a new rod you might get a couple gallons before the rod bushing wears and the crank is totally done.

For Example: with the pin at bottom dead center - your 12 and 6 o'clock measures .194 and the 9 and 3 measure at .192 or less - you need to replace your crank.
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Old 01-24-2010, 05:26 PM   #3
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I was told by my engine man that novas are .196, but OS is .195.
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Old 01-24-2010, 08:10 PM   #4
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Most crankpins are pretty close to .196, Rb's are around .198, some .28's are much bigger.

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Old 02-14-2010, 01:50 PM   #5
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is this sae measurement or metric? i measured my crank pin and got 4.95 mm is this acceptable?
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Old 02-14-2010, 01:55 PM   #6
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4.95 mm equals 0.1948.
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Old 02-14-2010, 02:05 PM   #7
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also watch if youre crankpin is out of round and can make the crank useless..vspec cranks dont last that well in my experiance ..but the speed cranks last and last due to the coating on them.
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Old 02-14-2010, 02:10 PM   #8
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thanks it measured 4.95 all the way around and there didnt seem to be any visable signs of wear on the crank pin so looks as if i will be fine to use this crank
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Old 03-28-2010, 07:22 PM   #9
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Quote:
Originally Posted by MontanaMaxx View Post
thanks it measured 4.95 all the way around and there didnt seem to be any visable signs of wear on the crank pin so looks as if i will be fine to use this crank
there made with metric measurements i figure its a good idea to measure in metrics


new 4.98 to 4.995
throw away at any out of round or coning more than .04mm or if any measurement is less than 4.92mm . last rerod at 4.92mm will be good for about 1-2gallons and the crank will be garbage!!

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