Finally...some one installing a bellhouse the correct way.
Everyone pay attention now.
Make sure both mating surfaces are super clean with no paint etc
Install every bolt and torque to spec. Be sure the threads have assy lube on them.
I use studs not bolts. Much better results.
Be sure the BH is repeating the runout deviation by removing and reinstalling it at least 3x. Repeats the measurement to the number within +/- 0.0005 inches. 0.000000 is better.
Install whatever offset dowls the calculation calls for
Repeat measurement
Make 12 o'clock the zero position
Then make your diagram. That will show the axis of alignment of the BH so you can align the dowels with that line
If you don't like your new measurements you can move the clocking a bit to see if it improves
You need to be CLOSE to zero as possible as it affects overall performance, wear, noise, shifting esp going into 1st when rolling up to a stop. 0.005 is a lot in my world of 4 speed
0.0025 max, 0.00050 is best
The back of the bh needs to be checked for squareness to the center-line of the crank. This is important. 0.0000 is the spec. The amount of torque on the 2 lower large diameter studs or bolts does affect the squareness. Some times the bh needs shimmed at those bolts/studs to make it square.
Be sure the transmission bolts to the bh before you install it in the car.
Use the roller pilot bearing.
Do not drive without the metal bottom cover installed correctly.
Advice is only useful when you follow it
