Turbo System Question

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Jun 11, 2008 | 08:15 PM

CowboyFromHell

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Turbo System Question

What exactly is the purpose of the piece on the air cleaner box that goes into the valve cover? Does it have to be there? Thanks.

Jun 11, 2008 | 10:14 PM

David85

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From: Campbell River, B.C.

I think you are talking about the CDR valve, about the size and shape of a tuna can.

CDR valve = Crankcase depression regulator valve. Some dealers call it a cank case vent tube adaptor. I would leave it there.

It is designed to regulate the amount of blowby gasses and oil mist that always builds up in the cankcase of any engine. Diesels have a lot more blowby than gassers, so a PCV valve would not be able to cope. Without this thing, oil consuption would be much higher. High oil comsumption complaints are sometimes caused by this valve being clogged or damaged.

Jun 11, 2008 | 11:40 PM

Dave Sponaugle

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From: Nutter Fort, WV

Also if you vent the blow by to the air, you always have this vapor cloud at the end of the tube.

Jun 12, 2008 | 02:56 PM

CowboyFromHell

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I have a wastegated ATS turbo system but i dont have the valve cover. Where can i find one. I tried to contact ATS but i couldnt get an answer.

Jun 15, 2008 | 11:37 PM

CowboyFromHell

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Does the CDR valve have to go into the valve cover?

Jun 16, 2008 | 12:56 AM

David85

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From: Campbell River, B.C.

Not really. Banks has an adapter fitting that puts a vent outlet at the injector pump drive gear housing and routes a hose to the CDR on the air filter box. I ended up modifying my valve cover and wielded in my own baffle.