http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=14858-Z3200

 

does all the z32 have these filters as its the first time ive ever heard of them?

Looks like the aiv filters to me mate

didnt know they were there. do they affect performance if not changed?

nicked ( err borrowed ) this from the tt net website ( ythanks to everyone involved in that venerable venture )

You will notice JW says to change the filter

 

As for the AIV (air injection valves) 'gurgling', they are in the front fender wells behind the plastic shielding at the rear of the front tires. Very few 90-92 ZXs have escaped a failure of these. Symptoms include the 'gurgling' sound at idle that stops just off idle and returns on decel back to idle. Also the car will fail the idle portion of most smog inspections, since the ECU adds 7% more fuel when they operate so the extra air they pump to the catalytic converter has some fuel to burn to keep the cat up to temp. If the AIVs are not sucking air into the exhaust the fuel just passes through making things worse then ever. The fix is to try to clean and align the reeds in the AIVs, replace reeds, or replace the AIVs as an assembly.

THE Jim Wolf of JWT (from his only known forum post!)

 

This information was contributed to the IZCC mailing list from Eric Rahkola:

 

Here's the steps to follow to fix the gurgling sounds from inside the front fenders. The Air Induction Valve (AIV) and its air cleaner are located behind the rear plastic fender linings in each fender. The air cleaner housing can retain condensation which is the cause of the sounds. In addition to replacing the air cleaner element, you will most likely need to replace the AIV valve assembly. It's very easy to do and takes less then an hour per side. Prices run about $100 for the valve from Courtesy Nissan. [ Note: Read Jim Klubens' section below on rebuilding the valves instead of replacing them, Ed. ] The AIV function, as described in the manual, is to send secondary air to the exhaust manifold using a vacuum created by exhaust pulsation in the exhaust manifold. When the exhaust pressure is below atmospheric pressure, secondary air is sent to the exhaust manifold. When the exhaust pressure is above atmospheric pressure, the reed valves prevent secondary air form being sent back to the sub-air cleaner. I've heard that de-acceleration is supposed to keep the assembly clear of water.

thanks matey :bow:

sorry about hijacking, but has anyone ordered from courtesy in the states.....their pricing seems so much better than here in the uk, although customs may change that slightly, but imho would be still cheaper..(mainly for oem parts etc)

 

Mark

From what I can gather they are uber reliable.

Also heard a rumour that if you can get a Parcel labled warranty replacement you dont get taxed on it but dont know the validity of that .

thanks m8, any others with courtesy experience??

 

Mark

I have used them many times, as said excellent service and the only time there was a mistake (which wasnt their fault) they sorted it out for me, shame UK companies cant learn from their customer service. :bow: