Miata Idler Pulley? A/C without PS

I plan to remove the power steering from my Miata next week, but I plan to keep the air conditioning.

The shop manual diagram shows the belt going from the crank pulley, around an idler pulley and then the A/C compressor. Is the pulley that drives the power steering pump actually the idler pulley or do I need to find a different pulley and bracket assembly? I'm wondering if the pump unbolts from the back of pulley bracket and the bracket and idler stay in place.

You need the special pulley for this. It replaces the PS pulley. We might have some at FM.

Thanks Keith. I'll give you guys a call on Monday.

Is it just the pulley that's different, or is it the whole bracket assembly?

It's a whole bracket assembly along with a pulley.

I believe if you already have PS, you can reuse the bolts that held the PS bracket to the engine.

I found a part number for "Standard Steering Sub-Kit", NA01-YV-SK1 , which is apparently the whole assembly. It is listed as required when adding A/C to a car without P/S in the 1990 A/C installation instructions.

Can anyone confirm that the same part is used on a 1.8? I can't find any reference to it when I search by part number, nor can I find A/C installation instructions for a 1996.

Thanks.

I've also found a part number for a 99 Sub Kit, NA79-YV-SK1, which may get me closer.

I can't think of why it would be different on a 1.8.

The parts fiches show the assembly as BP01-15-930. Same part number for 1990, 1995, 1997 and 1999.

Anybody got a picture of that part? Removing the PS would help my new turbo install with a bit of room...

Xceler8x wrote: Anybody got a picture of that part? Removing the PS would help my new turbo install with a bit of room...

I just thought that there might be an alignment difference between the 1.6 and 1.8.

http://www.miata.net/garage/AirInstall/AirParts.pdf

The difference between my part number and that for the "sub kit" would be the belt :)

If you're not running AC, you don't need to worry about it.

I got this e-mail from Rosenthal Mazda so I thought I'd pass it on:

Since both kits are exactly the same you should use the NA79, as the NA01 is no longer available. There was a difference in the bolt and belt numbers in the NA01 kits but they have since been superceeded to the NA79 numbers.

Thanks for the parts blow-up. Gave me an idea as to how this could be applied to turbo cars.