Crankcase Evacuation Kits - Chevy Nova Forum
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Old 24th-May-2010, 05:32 AM   #1
lktna
 
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Crankcase Evacuation Kits

I have never used one before but I am thinking about giving it a try. I just got my Nova back together and it is smoking kind of bad and I had a friend tell me that that would take care of it. It is a solid roller 360 ci sb with 12.5:1 compression, Dart Iron Eagle 230s and all forged bottom end. It runs strong as hell but just smokes. Has anyone used one and it got rid of the smoke or is it a waste of money?
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Old 24th-May-2010, 01:25 PM   #2
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I use one on my street car. No ports in the rocker covers. I have an early 327 with vent in the rear & vent/oil cap in the front. Installed the bung and valve just before the collector on the passenger side header. Welded a hose fitting to the stock vent tube assembly. Ran a hose between the two. Worked too well at first. It pulled oil up through the vent. I installed a restrictor and works well now.
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Old 24th-May-2010, 01:38 PM   #3
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If your engine is smoking because of excessive blowby, crankcase evacuation won't fix the root problem. Do a leak down test to determine if you have poor sealing rings.
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Building a small, high rpm engine
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Old 24th-May-2010, 05:39 PM   #4
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There isn't any blow by. When I pull the pcv valve there is no smoke what so ever. I was thinking with it being a decent size solid roller and not much vacuum that it was causing oil to be sucked into the intake.
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Old 24th-May-2010, 06:02 PM   #5
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Quote:
Originally Posted by lktna View Post
There isn't any blow by. When I pull the pcv valve there is no smoke what so ever. I was thinking with it being a decent size solid roller and not much vacuum that it was causing oil to be sucked into the intake.
If that's the case, then your valve cover either doesn't have a baffle or the one it DOES have is ineffective.

If you really are sucking oil into your engine from the PCV valve, then the E-Vac system is going to do the same thing and suck the oil right into the header collector.
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Old 24th-May-2010, 07:10 PM   #6
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Quote:
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If that's the case, then your valve cover either doesn't have a baffle or the one it DOES have is ineffective.

If you really are sucking oil into your engine from the PCV valve, then the E-Vac system is going to do the same thing and suck the oil right into the header collector.
I don't have baffles in the covers. I was just wanting to know if it would help. Wasn't really looking for a smartass answer. If I wanted that then I would have as a jackass the question not fellow Nova people!!!!!
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Old 24th-May-2010, 07:26 PM   #7
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Quote:
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I don't have baffles in the covers. I was just wanting to know if it would help. Wasn't really looking for a smartass answer. If I wanted that then I would have as a jackass the question not fellow Nova people!!!!!
That's not a "smart ***" answer at all. He has a very valid point. From your description the pan evac won't help you.
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Quote:
Originally Posted by Paul Wright
Building a small, high rpm engine
with the perfect bore, stroke and rod ratio is very impressive...
like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.

Cubic inches is like Indiana Jones with a cheap pistol.
.
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Old 24th-May-2010, 07:29 PM   #8
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Quote:
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That's not a "smart ***" answer at all. He has a very valid point. From your description the pan evac won't help you.
That is the kind of answer I was looking for. Thank you.
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Old 24th-May-2010, 07:33 PM   #9
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How do you have the engine ventilated now?
Vent?
PCV?

Nothing?

Al
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Old 24th-May-2010, 07:54 PM   #10
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Pcv valve.
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Old 24th-May-2010, 11:16 PM   #11
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Quote:
Originally Posted by lktna View Post
Pcv valve.

Breathers?
Or just a single PCV?

The engine must be vented.
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Old 25th-May-2010, 04:05 AM   #12
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Just a single pcv and a breather. Right side pcv and left breather.
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Old 25th-May-2010, 12:25 PM   #13
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If there are no baffles in the valve cover then it is most likely sucking the oil in through the PCV and that is causing it to smoke would be my guess.
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Old 25th-May-2010, 01:03 PM   #14
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i run my pvc through a oil/ air seperator.
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Old 25th-May-2010, 01:42 PM   #15
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Quote:
Originally Posted by lktna View Post
I don't have baffles in the covers. I was just wanting to know if it would help. Wasn't really looking for a smartass answer. If I wanted that then I would have as a jackass the question not fellow Nova people!!!!!
Not trying to be a smartazz, just giving a straight forward, no B.S. answer.

Sorry if I didn't sugar coat it enough to your liking.

You either need a baffle or an effective oil separator to keep EITHER system from sucking the oil mist out of your valve cover.
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