i've been researching and seems like you can get around ast with a 2 gen filler neck but i cant find one any one have one for sale or can point me in the right direction on where to find one

 

Mazdatrix.com

 

Malloy Mazda will have them cheaper than Mazdatrix most likely. Tell them you are on the Club at Malloy and ask for Ray.

 

Wouldn't it be cheaper to drill and tap for a plug?

 

you really couldn't find one? non turbo and turbo basically are the same within series. Did you check the classifieds? Remember that there are a gazillion FC parts cars out there and filler necks are not expensive/desired parts

 

+1

 

+1 for Ray at Malloy 888.533.3400

Do you have any junkyards close to you? I would imagine you could find them there...

 

I would think that he would be using the series 4 aluminum filler neck. There is ZERO reason to buy this brand new from Mazda, whether it's Ray Crowe or otherwise. There were literally 10s of thousands of FC's with this filler neck and they don't break. The series 4 FC has a much more dependable cooling system than the FD ever did.

 

I think it was like $23

 

well damn. $23 ain't bad.

 

The FC is not aluminum it is plastic, the FD is aluminum. This would be the main reason to buy a new FC one if you are planning this mod. After 23+ years on an FC they are brittle, we see them crack all the time, you do not want to trust your FD engine to a cheap piece of plastic.



If you the facilties/tools to drill and tap the stock FD assembly, this is the better route. Then just install a new pressure cap

 

I found a brass one off an FC in pick a part junkyard. i forgot what kind of fc it was however. -______-

 

Can you post a pic of your current t-stat housing and filler neck? I could be wrong, however I believe there were certain vehicles that had t-stat housings where it was all one piece, and you couldn't just un-bolt the FD filler neck, and re-bolt the FC one on there for an AST deletion.


But yeah, if you don't need to replace your t-stat housing then you should def just go through Ray Crowe at Malloy. Ray is a great guy, his prices are very fair and he gets what you order out to you asap!

 

A new one...at least from Ray, will also come with a new 'O' ring and .9 bar spring cap. Two things that you need and won't have to worry about getting "used".
As for drilling and taping...IMO you want to do that in order to plug off the nipple for the hose going to the bottom of the radiator. IIRC, a 1/4" NPT plug. And similarly plug up the nipple at the radiator.

 

+1 part of the FD cooling system recall was to replace the PLASTIC FC filler cap adaptor with a metal one afterall

 

But the FD cap doesn't have the overflow line at the top to delete the AST. It will take many years to have problems with the FC cap, mine works fine.

 

+1 for Ray at malloy mazda. I just called him up and told him what i wanted to do and he knew what parts i needed and shipped em off to me. Don't remember the cost but it wasnt much.

 

thanks everyone for the help i went to mazda trix 50 bucks shipped 2 days perfect

 

Ray would have been cheaper and had it to you in one day

 

no. there are S4 FCs with all aluminum thermostat covers. i have seen several. i think mostly S5s came with the plastic ones.

 

Wrong. S5's have no covers at all, the cap is a long plastic tube on the radiator. The S4 are all plastic, only way to get an aluminum one is to upgrade to a FD version which does not have the overflow nipple.

S5 radiator and fill neck



Aluminum S4 Assembly from FD

 

Just to correct for posterity...^this would be from an S6, not S4. I know Mr. Sanders knows the difference but it might confuse others.

I still have my aluminum filler extension. I may drill and tap it for a hose barb and replace my plastic FC one if it ever looks like it's getting tired.

 

Correct, what I pictured is an S6, however it can be used on an S4 that does not have the need for the overflow tube from the filler neck (88 or upgraded rad)

To clarify I was pointing out that an aluminum S4 assembly would have originated as a FD assembly.