in the engine bay....
one of them RIGHT UNDER the cross over pipe to the intercooler cracked...
how much damage is it doing to my car until I replace it this weekend?

 

There is more than one check valve in that area. I think there are 3?? You should figure out what it attaches to, and post again.

I would guess that it is OK to drive the car if it is running right. I would not drive it hard.

 

The check valve closest to the crossover pipe is the pressure chamber check valve. The other is the vacuum chamber check valve. A cracked pressure chamber check valve will hinder primary boost production. A cracked vacuum chamber check valve will affect how the secondary turbo comes online. I'd replace them ASAP, unless you want to be frustrated with boost control problems...

 

get real brass check valves with viton diaphragms at circle-seal.com

tom

 

these check valves are just plug and play right?

and I am pretty sure its the pressure chamber one cause getting lesser boost on primary turbo than second one...

 

will look at those..

 

oh yeah...are they all the same size or MAZDA has to look at them..last time I went..that dude was tryin to say they are different sizes?

 

Tom Jelly,

Do you have the product number of a circle-seal check valve that would be a plug-and-play unit? The catalogs are not very detailed.

 

lol...thats why i stopped lookin..

 

Just order the OEM ones. They lasted almost 10 years, they'll make it another 10 or so (if the rest of the car lasts that long)...

 

Mahjik, do you have a realiable parts connection for the check valves? I can't seem to get our dealer parts boy to understand and order the right parts. even after i get the part #'s!! Thanks for your help.(I know i've seen it here before)

 

Call Ray at Malloy. He knows the check valves, and will get you the right ones.

Also, be aware there is a "vacuum hose replacement kit" available from mazda. The kit runs in the $175 range, but includes ALL the check valves and many hoses, most of which you won't use. As compared to the individual cost of sinle check valves at a a time, it's a MUCH better way to go, IMO!

 

yeah...thats what the dude at Mazda was sayin too..

but yeah...its as easy as plug in vacuum hose and drive right? atleast thats what it looks like to me.

 

where is Malloy?

 

It doesn't do any damage, you just won't be getting the perfect 10-8-10 boost pattern. Despite different part numbers and such, I'm pretty sure all the check valves are the same. They all just allow air to flow one way, and not the other.

That being said, I agree with Mahjik, get the OEM ones, they're durable enough, especially if you have cooling mods, then they'll last even longer.

 

As spurvo pointed out, call Malloy Mazda:

Malloy Mazda
1-888-533-3400
Talk to Ray Crowe

If Ray isn't around, the other guys seem to be equally qualified or just leave Ray a voice mail. He will get back to you.

As far as actually replacing them? Just make sure you check the vacuum diagram and have the check valve arrows going in the right direction when installing them. That's it!

You may as well check all the other check valves that are in reach while you are there. Just make sure you can only blow through ONE direction.

 

Virginia

 

thanks...guess he is already off by the time I get off...will call tomorrow .

 

Big time thanks. thats the name i remember.(Ray @ Malloy) FYI: Mazdatrix stocks the (green and black check valves. around 30 bucks each. I spoke with Henry.) they only had one left... race ya!!

 

$30!!?!??!
Mazda REALLY gonna charge a BILL!

 

The quote below comes form this link: http://www.autosportracetech.com/RX-7/faqs.htm

What are the part numbers for those one-way / check-valves?

The all White one: N3A1-13-1995 (note: this is a revised p/n and is a very expensive part - $40)

The Black/Green one: N390-13-995A

The Green/White one: HE41-13-995

The Aluminum one: NF01-13-890

Note that Mazda has been consolidating part numbers lately and has started using N390-13-995A for the Black/Green and White/Green.

 

$30 dollars! I just bought a used one for $1...plus the shipping, which turned out to be more than the actual check valve. $30 is beyond ridiculous though...

 

I recently bought the Black/Green one from Malloy for $19 with no shipping or tax charges. If you want to buy new, Malloy is the best!

 

sorry for the sticker shock everyone that's just what i was told. letting everyone know. I will be calling Malloy in the morning to get prices and order. hopefully they are open on saturday. Thanks again to everyone for the correct connection. Every penny saved is a penny spent somewhere else..

 

well..if you call them first...POST up and let me know..

I can not call till 9am PST....