NA bottom pulley

[Big G]

Has anyone seen a pulley like this on a '90 NA?

[mx52nv]

Yes I have

That looks like your crankshaft pulley and the associated A/C belt.

I hope that is the answer you were looking for.

[Juffa]

Upon closer inspection the pully doesn't appear to be made from metal, more like some kind of plastic. Maybe the car suffered from the in-famous short nose crank issue and the pulley was replaced?

I for one have not seen a non-metal pulley fitted to a MX-5.

J

[Big G]

The reason for the question is:- Most early NA cars had a crank pulley with four slots, these are referd to as LWSC , the dodgy ones. The later engines had 8 slots..better. This one has no slots, was there some interim style?

And yes mx52nv that was one ofthe answers that I was expecting, but not the answer that I wanted

[GS]

Ive read somewhere that there were some interim cranks built. Obviously we know about the "short nose" and "long nose" engines, but i think the interim ones were called the "long bolt"?? I'll have a quick search, because i know i read it recently.

Edit:

Found the site i was thinking of, but it looks like i was heading down the wrong track. It talks about the short nose, long nose and big nose. The big nose is the 8 slots in the pulley, but it looks like the interim long nose was a service fix that, from the sounds of it, used the same pulley as the short nose:

http://www.miata.net/garage/crankshaft.html

[SuperMazdaKart]

looks like a normal pulley to me, just a bit covered with dust/dirt etc sticking to oil underneathe?

the belt grooves is still metal there.

[GP]

Upon closer inspection the pully doesn't appear to be made from metal, more like some kind of plastic.

Plastic pulley

[Fatty]

Upon closer inspection the pully doesn't appear to be made from metal, more like some kind of plastic.

Plastic pulley

Wun would be proud.