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interesting crankcase pressure problem..thoughts?

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Old Jan 3, 2009 | 11:05 AM
  #21  
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To add to edcmat's comment... if you use any sort of oxygen sensor, you'll be fouling them out on a regular basis. All the oil that would have made it to your intake will be going right into your exhaust.
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Old Jan 3, 2009 | 12:26 PM
  #22  
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Originally Posted by SMOKINV8
To add to edcmat's comment... if you use any sort of oxygen sensor, you'll be fouling them out on a regular basis. All the oil that would have made it to your intake will be going right into your exhaust.
I would HOPE they would at least put it downstream of the 02s.
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Old Jan 3, 2009 | 12:32 PM
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Originally Posted by VGLNTE1
so you remade the AIR tubes?
No. The crankcase evap setup comes with tubes that have an angle cut on the end. I cut a hole in my exhaust just behind the collector and put them in on an angle facing towards the back. The exhaust pulses moving the air over the tube creates a vacuum. Then there is a one way check valve so that you dont get any pressure back up thru the hoses (on each side) that run up to the valve covers. Then there is a MOPAR style breather/separator that guess onto the valve covers.

I actually just got it installed and tested it (with my thumb over the hose) at idle and there is definitely vacuum there. This will work on MY street car although my street car is more of a race car than most.

I understand what everyone is saying about needing the vacuum to the intake but I haven't been able to make that work well for me. I hate oil in the intake and don't want it in my combustion mixture. My car didn't blow oil out of the breathers unless I sprayed it but it steamed alot at idle. JMHO.
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Old Jan 3, 2009 | 12:36 PM
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Originally Posted by edcmat-l1
The problem with using that type of crank case evac, is it's intended for race cars that spend all their time at higher rpms. Under normal street driving, you just don't have the exhaust velocity to pull very hard on the crank case.
I know everyone thinks these systems are the ****, but what works on a race car, does not always work on a street car.
You dont need alot of vacuum. Any vacuum is good vacuum compared to a vented system. Closed system just wouldn't work for me.
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Old Jan 4, 2009 | 08:39 PM
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If you are blowing your dipstick out you have more than a pcv problem. I have only seen one car do that and it had cracked rings on three pistons. You should do a leakdown before anything else.
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Old Jan 5, 2009 | 01:37 AM
  #26  
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Originally Posted by ls2formula
If you are blowing your dipstick out you have more than a pcv problem. I have only seen one car do that and it had cracked rings on three pistons. You should do a leakdown before anything else.
ugh.....after all the work ive done on this car....id leave it and say **** it...they can stay broken
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