I ran into a little predicament earlier. Trying to install my Clutchmaster Twin Disc on my K24A1 crank and the flywheel bolts that I have bottomed out on the crank before they tightened the flywheel down. Those flywheel bolts have 23mm long shafts on them and I found a few other flywheel bolts in my spare bolt bin that measured at 20mm. I think those are B series, but not sure. I also have some bolts from an automatic Honda, but they are obviously too short for what I need.

Can someone verify the length of the shaft on a K20A2 flywheel bolt and a B18 flyhwheel bolt? I do not have any extra nor do any of my friends that are close by. Maybe someone out there that reads this can help me out a little. Just trying to figure out which bolt is which.

By the looks of it the depth of the crank on my engine to the edge of the flywheel is around 23.5mm deep. The 20mm long bolt would probably work just fine for that, but I need to know which car to order it for. The Honda and Acura parts sites did not list bolt length of the flywheel bolts.

 

Can someone at least verify that a B18 flywheel bolt has a shaft length of 20mm?

 

just measured a set of flywheel to crank bolts from a manual '97 B18B1 and the bolts measure 23 mm, here are some pictures for reference: