Hello,
I want to install a catchtank to my series 7 FD.
But I'm a bit confused. Some manuals for catch tank installation say to connect one line from the tank to the nipple on the top of the filler neck and one to the PVC line from the primary turbo.
The FD manual shows this:

But on my car the nipple is closed with a cap. Is the car on the factory manual equipped with a factory catch can or why is ist different on my series 7 car.

Best regards
Bastian

 

That setup was deleted on series 6 cars, only offered on the 93 model year. 94 and later got the axe for that system. Go ahead and remove the cap and run it accordingly.

 

what is that "axe" you talking about. I can't find something about

 

That's an American saying, he meant that it was removed from later cars.

"Got the axe" is commonly used to say that someone was fired from a job, or that something was eliminated.

That said, the oil fill neck has 2 nipples on it. The one pointing down goes to a rubber hose, then to a metal pipe, then to the black plastic primary turbo inlet duct. The one pointing to the side goes to the greyish/black PCV valve that goes to the intake manifold. On 95 cars, Mazda removed the PCV valve and capped the side-pointing nipple on the oil fill neck as well as capping the nipple on the intake manifold. The system isn't really necessary.

Dale

 

Thanks DaleClark!

 

I'm still trying to find the optimum solution too...

Is there a downside to keeping the PCV valve plumbed in?

My catch can on my '93 is in series between the top fitting and the hose to the turbo inlet. It is working well - maybe too well? I'm catching nearly a quart in a 20' track session.

 

Only if the PCV fails

I have the same problem. You can try running a little less oil. Also, IRP sells a baffled oil filler neck. I've installed one, but haven't gotten out to see if that helps.