[Chuck Luther]

Hey Everyone happy new year!
I have been reading up on the mysterious Valve cover venting holes... noticing that I didn't have either hooked up... DOH!

Just got the "A" hose from OTGS and now I was wondering what type of tube can I use on "B" hose? I have a 71 - I found the hole on the manifold, so I have two connection points - Can I just go to Checker Auto and pick up a tube? Heat resistant? I looked on OGTS to see if they had one but I don't know what to call it.

I'm so bored at work, do you think I can read all the forums on this site before 4? I'm trying. Will I be the first?

Thanks!

 

[Gary]

I used the braided vacuum line that a VW bug uses for the "A" hose. The key is to make sure you connect it to a "Metered" orifice.

 

[Chuck Luther]

"Metered" means...

I don't recall reading about "metered" orifice. Can you explain a little bit? Is the pict a metered orifice?

 

[Jim Branham]

Yes, that is the stock location for the smaller diameter hose.

 

[kwilford]

Do a search under "PCV". Fifteen threads on this topic came up, and at least 5 are worth reading. And note that the earlier engines ('69 or early '70 and prior I believe) had the metered orifice on the engine side of the intake manifold

 

[Chuck Luther]

read them... but still confused on "metered"

Thanks dudes! I read your ( keith ) many forums on that subject! And thats what got me this far... but what Gary meant about "metered" doesn't mean that I have to do anything to the hose or the orifice right? the "metered" part is already done for me? I just would put a tube from the valve cover to the manifold hole and good to go?! thanks

 

[kwilford]

Hmm, I seem to have become the God of PCV questions...

Yep, the metering is done by the 1/16 inch hole in the little tube on the intake manifold. The hole is just big enough to pull a slight vacuum on the valve cover at idle, thereby scavenging excess crankcase gases. But not so big as to pull a full vacuum on the crankcase and suck the oil seals inward, nor to allow so much air flow as to simulate a vacuum leak in the intake system. And any connection to the intake manifold below the carb base with a 1/16 inch orifice should work.

The Opel Owners Manual and FSM says the PCV orifice should be cleaned out every 6000 miles. My guess is that less than 10% of all Opel owners even knew there WAS an metering orifice, and even less followed that recommendation

 

[Chuck Luther]

Clean your orifice

Yes, from all of the forums on this topic you are GOD!! Now... how does one clean his/her orifice? hahah that sounded way too funny so I had to write it that way!! clean your orifice, I said orifice.. snort. giggle. wire brush? ow.

 

[Chuck Luther]

Found this re-read forums

From one of Bucky's entries... bought 1/16 '' ID vacuum line and routed it..to a brass barb that I set with permatex and epoxy....

So I guess I need a 1/16" ID Vacuum line!!