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  #1  
Old 03-08-2004, 01:09 AM
Fig Fig is offline
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Default Crankcase Evacuation

I have a 37 Plymouth coupe with a 440 and a 727. For some reason I keep getting a lot of moisture in the valve covers. The oil is clean and water free, my guess is since I live near the ocean I am just getting the moisture from driving the car short distances. Currently I do not have any PVC or any other type of crankcase evacuation system on it. I am going to put the old fashion system that connects a heater hose from the valve covers to a pipe behind the muffler.
The question is: is there a better system for a street driven car?

Thanks for the help

Allen
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Old 03-08-2004, 01:45 AM
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dwc43 dwc43 is offline
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Well, you found your reason for the moisture. With no pvc system it will get moisture in it. Also make sure it runs at least 190 on the temp gauge and no more than 210 max. THe higher temps help to keep the moisture out and make sure to warm it up before driving even on a short trip. Your engine will last longer and moisture will be reduced.

As for evac, you need the two asperator valves to install into your headers, or at least as close to your manifolds as possible, then add your hoses to them and your sealed valve cover breathers. It's actually the best system to use.
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Old 03-08-2004, 02:17 AM
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pishta pishta is offline
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Run a better system than that. Gut a PCV valve and run the hose to the underside of your air cleaner. The small amount of vacuum in the air cleaner assy will draw the vapors out and through the carb. Make sure you have a vented oil filler, such as a push on on the front of the opposite valve cover.
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Old 03-08-2004, 02:19 AM
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Actually the header evac system is better. You get more vacuum form it and those fumes wont contaminate the intake charge so you get a little more power with a cleaner intake charge. And as rpm goes up, the evac system gets better.
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Old 03-08-2004, 02:35 PM
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My guy down at the local speed shop talked me out of installing the header-evac system on my 340. He says that unless I was running it hard all the time it would have less effect compared to a regular old pcv valve. At normal street driving speeds, does the header-type system create much vacuum? just curious
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Old 03-08-2004, 02:37 PM
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Yes it does, even at idle cuase you still have a lot of flow velocity through the pipes at all times.
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Old 03-08-2004, 02:52 PM
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gsmopar gsmopar is offline
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I'm going with an electric vac pump.
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Old 03-08-2004, 07:33 PM
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moraycen moraycen is offline
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Confused e vac?

pishta's hose to the air cleaner works well just make sure you don't put the hose inside of the filter as we all know old mopars are knowen for carb. backfires and this WILL BLOW YOUR VALVE COVERS OFF do you want to guess how I know this?!
Ray
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Old 03-08-2004, 08:43 PM
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It has to go inside the air filter or else it wont get clean air and you'll suck a lot of trash into you valve covers and oil system.
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Old 03-09-2004, 12:43 PM
Fig Fig is offline
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Guy's, thanks for the comments. I do have the complete header evac system off of my old bracket car. I think that I'll try that way first. Again, thanks for the help.

Allen
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Old 03-09-2004, 06:27 PM
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Welcome, anytime.
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Old 03-13-2004, 05:37 AM
coolcarz coolcarz is offline
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Your probley getting condensation in the valve covers, because I would guess you dont drive it much, and when you do is it for short hopps? the motor dont have time to really warm up long enough to burn up the moisture from the times before. happens to any vehicle that does not get drove much. for sure when you are by the coast.. no evac system will totally fix that prob...
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