1987 4.9L inline six. Somehow in the process of having the engine worked on and doing our own work I've managed to lose the bolt that goes in the crankshaft holding on the harmonic balancer. The balancer is all one piece with the pulley. Does anyone know what size and grade bolt goes in the crankshaft?

 

Why not just go to a junkyard and pull another one?

 

Don't recall the size, but it should be a Grade 8 "tap bolt" (no shoulder, all thread)

 

Ford 240 300 4.9 liter 6 cylinder engines Cylinder head bolts / fasteners

If you still need it, you can get it there.

It's a big, hefty bolt, so it's not cheap.