Back four intake runners wet. Need advice.

daddystang

New Member

Aug 13, 2006

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Jul 2, 2007

#1

• Jul 2, 2007

• #1

Guys I've had this problem for a while. When I had my intake off a month ago I noticed the back four lower intake runners were wet, yet the front four were dry. I was cleaning the engine yesterday, and noticed that the back half of the phenolic spacer was wet, and the front half was dry (back half was a dark brown color, the front was the normal looking light brown color). I did some searching, and found that this is probably a problem with the PCV system which is stock right now. I read that I could put a air/oil seperator on the PCV hose, but some say this isn't a fix, rather just a bandaid. Is there anything I can do to stop this permanently. Thanks for any thoughts or help you can provide.
The car feels like it is running/idleing really good also.

Thanks in advance...

 

1991vert

10 Year Member

Feb 27, 2004

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Ludlow, MA

Jul 2, 2007

#2

• Jul 2, 2007

• #2

my back 2 were still wet after an air/oil seperator...subscribing

 

vristang

15 Year Member

Mar 31, 2005

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Seattle

Jul 2, 2007

#3

• Jul 2, 2007

• #3

I have no way to explain why some runners would be wet with oil, and others wouldn't.
I would be interested in hearing any theories on this...


The separators are great for confirming that the pcv is the source of oil contamination in the intake.
There is nothing wrong with hooking one up. And it will give you an idea of how bad the situation is...


jason

 

daddystang

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Aug 13, 2006

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Jul 2, 2007

#4

• Jul 2, 2007

• #4

Thanks guys. I'm thinking I'll try the separater. I wonder if a breathable oil filler cap would help reduce the pressure in the crankcase (if that's what's causing the oil to go past the pcv valve). Any thoughts on that guys?

Thanks again...

 

vristang

15 Year Member

Mar 31, 2005

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Jul 2, 2007

#5

• Jul 2, 2007

• #5

daddystang said:

Thanks guys. I'm thinking I'll try the separater. I wonder if a breathable oil filler cap would help reduce the pressure in the crankcase (if that's what's causing the oil to go past the pcv valve). Any thoughts on that guys?

Thanks again...

Click to expand...

If you use a breather with the pcv still in place, then you will effectively create a vac leak.
Fresh (un-metered) air enters the crankcase via the breather, then gets pulled into the intake through the pcv...

It doesn't sound like you need to worry about increasing capacity that much...

Do you still have the baffle on the passenger valve cover?

jason

 

98BLKGT

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Dec 23, 2001

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Jul 2, 2007

#6

• Jul 2, 2007

• #6

My guess would be its because the PCV line comes into the intake on the right side.

 

vristang

15 Year Member

Mar 31, 2005

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Jul 2, 2007

#7

• Jul 2, 2007

• #7

That is a sound theory...

(my mind always seems to focus on my box upper intake, which wouldn't produce the same results as a long runner intake. Especially when you consider the location of the pcv inlet to the manifold)

I'm satisfied with 98blkGT's theory...

Anyone wanna argue
jason

 

daddystang

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Aug 13, 2006

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Jul 3, 2007

#8

• Jul 3, 2007

• #8

Nope, I don't have a baffle on the valve cover, and I agree that it's because the pcv runs to the back of the upper intake. 98blkgt, my gasket looks exactly the same. You would think there would be some way to put a "T" fitting in the PCV hose, and then run a hose to one of the valve covers to let the oil coming up through the PCV valve to then drip back down into the motor. In a sense it would be like using a separator, and giving the oil a route back to the motor rather than just filling up in the separator. Do you guys think something like that would work, or would that also create vac leak. Just turn'in the gears in my head. Any thoughts?

Thanks guys for your input.

Joe