2nd Generation Specific 1986-1992 Discussion

Crankcase Ventilation

Old 03-21-2004, 06:57 AM
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Can someone please outline the PCV system for a 2nd gen RX-7? I can't help but wonder if my car's smoking problem is caused by a malfunction here.



The FSM doesn't go into much detail.



Thanks!
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Old 03-21-2004, 10:58 AM
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There is a nipple on the intermediate iron near the oil filler neck and a nipple on the oil filler neck itself. These need to be hookedup to vacuum. In stock form the 2 hoses that plug into the stock tid are the vacuum source the PCV.
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Old 03-21-2004, 11:23 AM
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Needs to be hooked up to a vacuum? I can't just run a line over to the charcoal canister?
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Old 03-21-2004, 11:24 AM
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Originally Posted by ColinRX7' date='Mar 21 2004, 12:23 PM
Needs to be hooked up to a vacuum? I can't just run a line over to the charcoal canister?
You can open vent them, but its best to have it hooked up to vacuum. Especially if you think you're turbo is smoking because of it.
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Old 03-21-2004, 12:04 PM
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the way the stock setup works is that the charcoal cannister and the oil filler neck are hooked up together. they tee off and go to the intake via a solanoid and that round spaceship looking valve. it opens when theres vacuum in the tb, when theres boost the check valve is closed and it gets sucked to the front of the turbo.



on our race car we have a catch can and its very sensitive to oil level, 1/2 quart too much and it would fill the can with that 1/2 quart
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Old 03-24-2004, 08:27 PM
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how do you bypass it?
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Old 03-25-2004, 06:40 AM
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Originally Posted by NCTII87' date='Mar 24 2004, 09:27 PM
how do you bypass it?
I don't think there's any reason to bypass it. I just want to make sure its working.
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Old 03-25-2004, 10:50 AM
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Originally Posted by NCTII87' date='Mar 24 2004, 06:27 PM
how do you bypass it?
why would you want to? theres no moving parts, and it keeps the motor from blowing oil everywhere
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