Properly Mic'in a Crank...Whats the Stock Specs?

[89ShelbyGuy]

Hey guys, i am looking for the stock specs of a 2.5 cast crank..i want to mic the journals out and need numbers to go from..anyone know what these are?

[turboshad]

Hey guys, i am looking for the stock specs of a 2.5 cast crank..i want to mic the journals out and need numbers to go from..anyone know what these are?

Are you looking to check clearances or see if the crank has been ground? To check clearances you don't need any original numbers to go by. Mic the crank and then use a snap gauge and mic or a bore gauge and compare that to the values from each crank journal.

I don't have the stock diameters off hand if you are checking to see if it has been ground.

DJ

[135sohc]

crankshaft journal sizes

main bearing
standard 60.000 +/- 0.013 mm
1st undersize 59.75 +/- 0.013 mm

connecting rod
standard 49.992 +/- 0.013 mm
1st undersize 49.75 +/- 0.013 mm