Snout Question

[georgeb]

I bought a backup motor sight unseen off CL that was supposedly an '88. It had a carb setup but the snout has the narrow keyway like my late '93. I borrowed a crank bolt out of a '91 backup motor (to turn the motor over) and it is too short. I'm thinking that this is a late block with the crappy crank hub that must be removed to service the timing belt like on my '93. It also has a rarer hub that I will have to find. Another identifying feature is no bolt holes in sprocket. What year pulleys fit this setup?

[Damkid]

Snout Question

It's possible somebody bought a 93' B3 and put it in the 88' at some point with swapping all the carb stuff over, it's hard to say for sure though

[Festy46]

There's a lot of engine swapping going on. Our first '89 carbed Festiva had a "big nose" crank like your '93. All the '93 cars and a few of the late production cars from '92 have the big nose crank. If you can use parts off your '93 engine, you shouldn't need the "rarer hub". It should be on your '93 engine. If you're talking about the heavy plate that the pulley bolts to, that is called a pulley boss. You can buy those from a Mazda dealer. Tell them you have an MX-3 with a 1.6L engine and it will fit.

[fastivaca]

I think the start date (production) for the large nose crank was December 92.

[georgeb]

The PO kept the weird pulley setup for his BP swap. If it won't work on a BP let me know so I can get it back.