AAC Valve Repalcement/Gasket
 

Ok, I've been searching all day through the carfiche.com microfiche, through google, and through courtesyparts.com database. I've been looking into the AAC valve for the 280ZXT. I don't necessarily want to replace it since my Z31 ECU no longer controls it properly but I'd figure I'd post this in case it hasn't been mentioned before.

Apparently info I got from Zcar.com is that the original AAC no longer exists, but there's a newer version of it with an allen head adjustment bolt on it to adjust the air flow through the valve for fine tuning your idle. Anyway I guess the new valve requires a slightly different gasket and longer studs as far as I can tell.

I finally got ahold of the old AAC valve part number: 23781-P9000
I searched it on CourtesyParts.com and it was flagged as a service file update and said to use other parts as a set.

New AAC Valve: 23781-V3025
Some sort of Cover: 23787-V0800
Gasket: 23785-V2700
Gasket: 23785-V0800
Stud (You need 2): 14065-B8600

I'm not sure what the cover is and why there are 2 gaskets, the second gasket 23785-V0800 brings up a part ACC Gasket, which I think is just a typo and the first Gasket: 23785-V2700 brings up GASKET VAL, I don't know if these are the same things. I figured I'd post this for anyone looking into replacing the AAC, also if anyone has and can direct me, which gasket do you need? I just want to buy a couple of the AAC valve gaskets for when I can get a proper block off plate made, as my AAC valve diaphragm is leaking and is probably the culprit for my idle problems.

Just make your own gasket... a lot easier & cheaper. I bought a sheet of cork gasket maker from AutoZone to do my 60mm TB to manifold gasket & have used it for many other projects since.

http://ecx.images-amazon.com/images/...0L._AA280_.jpg

Well now I didn't know you could do that, and I think I will.

Although hopefully for anyone wanting to the info on the AAC valve should help them, from searching I'm finding it common that the diaphragm wears out and doesn't seal correctly anymore much like mine is doing.