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Old 09-13-2011   #1
mgbrv8
 
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Default Breather Mold Project

Hey Tom the package came in today . So it begins the first rough CAD drawing is done. Next up finishing and then a mold and material selection.

Dave
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Old 09-13-2011   #2
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Default Re: Breather Mold Project

Concerning the two different style parts I was going to make the larger style (Pic, Breather2). Now I have a question, with the lower tube style PCV valve holder? Why is one PCV tube lower then the other(Pic, Breather2(3))? Were they originally the same height but one was trimmed?

Dave
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File Type: jpg Breather2.jpg (36.8 KB, 53 views)
File Type: jpg Breather2 (1).jpg (33.7 KB, 48 views)
File Type: jpg Breather2 (2).jpg (28.8 KB, 49 views)
File Type: jpg Breather2 (3).jpg (37.4 KB, 54 views)

Last edited by mgbrv8; 09-13-2011 at 06:46 PM.
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Old 09-13-2011   #3
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Default Re: Breather Mold Project

They have two different PCV valves. If you notice, the height with valve installed is the same across the two.
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Old 09-13-2011   #4
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Default Re: Breather Mold Project

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They have two different PCV valves. If you notice, the height with valve installed is the same across the two.

100 percent correct GM stepped em. Why?? So the mechanic (now you lol )would know which one goes where. It does make a difference. Simple and effective
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Old 09-13-2011   #5
mgbrv8
 
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Default Re: Breather Mold Project

I figured, So I will base both my dimensions off the taller one then. Now if anyone has any design changes or suggestions now is the time to speak up cause once I start making molds it gets trickier to go backwards.

Dave
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Old 09-13-2011   #6
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Default Re: Breather Mold Project

So you are suppose to have two different PCV valves? If so I will copy the one I have.

Dave
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Old 09-13-2011   #7
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Default Re: Breather Mold Project

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Originally Posted by mgbrv8 View Post
So you are suppose to have two different PCV valves? If so I will copy the one I have.

Dave
Yes, the valves are different, presumably in the pressure/vacuum at which they are designed to open/close.

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Old 09-13-2011   #8
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Default Re: Breather Mold Project

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Originally Posted by mgbrv8 View Post
So you are suppose to have two different PCV valves? If so I will copy the one I have.

Dave
As said, yes it is correct, no one trimmed that. I assume GM went with two valves, and two different ones at that, to get some kind of progressive crankcase evacuation. They did have some various issues relating to pressure and oiling, presumably this was part of the solution.

To be clear, what you show in your photos is what GM put on the car.
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Old 09-13-2011   #9
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Default Re: Breather Mold Project

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Originally Posted by mgbrv8 View Post
Hey Tom the package came in today . So it begins the first rough CAD drawing is done. Next up finishing and then a mold and material selection.

Dave

My suggestion is make this piece like an F also this way you can put hose clamps on the top of the PCV just like the bottom.

I cut and made mine like an F and have clamps on top & bottom of each PCV.

Pete
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Old 09-14-2011   #10
mgbrv8
 
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Default Re: Breather Mold Project

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My suggestion is make this piece like an F also this way you can put hose clamps on the top of the PCV just like the bottom.

I cut and made mine like an F and have clamps on top & bottom of each PCV.

Pete
Like this? Now this would be harder to make, I would recommend I make the other style and individuals cut it with a razor blade to make the cut out. What is the consensus gentlemen?

Dave
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