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PCV & oil burning U may be all wrong !! |
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raysinvegas 
AMC Addicted 
Joined: Jul/01/2007 Location: Las Vegas NV Online Status: Offline Posts: 804 |
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 Topic: PCV & oil burning U may be all wrong !!Posted: Jul/25/2010 at 11:29pm |
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You having trouble with that thing again Raymond? Jeebus, scrap that thing will ya? I'll even haul it off fer ya!
 Oh wait, I already have 8 cars.  Edited by raysinvegas - Jul/25/2010 at 11:30pm |
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Andy Ray
64 440H 64 440 Convertible 68 Javelin SST 343 DD! 69 SC/Rambler clone project 69 AMX 290/Auto 
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PHAT69AMX
AMC Addicted
Joined: Jul/07/2007 Location: SW Ohio Online Status: Offline Posts: 2278 |
Quote Reply
Posted: Jul/26/2010 at 1:54am |
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The Oil Seperators sold by Jegs would prevent needing to drill a hole in the valve cover.
It is something non-stock that would bee mounted to the firewall though.
They're see-thru clear plastic so amount of captured oil is visible, even has a drain.
They're pretty small realy, has (2) fittings and goes in-line between PCV and carb iirc.
Could be easily removed for shows etc, or if it doesn't work or catch any oil.
Scotchbrite, I think of the brand name dark grean woven plastic pads
that contain abrasives that can get in the oil as I understand it.
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billd
Moderator Group 
Forum Administrator Joined: Jun/27/2007 Location: Iowa Online Status: Online Posts: 15222 |
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Posted: Jul/26/2010 at 6:32am |
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I'd never use copper/steel pads. I've seen them in there - and they rust to bits................. moisture collects there. Then you have bits of rusted "steel wool" in the valley.
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A0M190Y
Supporter of TheAMCForum 
Joined: Jan/05/2008 Location: Pennsylvania Online Status: Offline Posts: 170 |
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Posted: Jul/26/2010 at 8:33am |
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This is an interesting problem. I had seen other posts about this on here and it related to oil smoke in my race AMX. I have an R4b that could not use the stock intake gasket due to the block and heads being cut. I used the proper thickness gaskets to make everything mate up when installing the manifold. I ran the PVC to a port in the intake, not to the carb as I am running a Holley 3 barrell.
Well, every once in a while, usually at the cecil county event, after one or two passes I would get smoke on the passenger side exhaust pipe only. Just between shifts and at the end on wind down.(High Vacuum) Only happened once the engine heated up. When the motor wasn't hot, it was clean as could be. Motor has less than 300 miles and maybe 12 passes on it so basically new. After seeing some posts here on the PVC it dawned on me that the oil may be getting sucked through the PVC. The clincher was that the port I used for PVC Vacuum only went to cylinder # 8. Pulled the plugs on the passenger side cylinder bank and sure enough, #8 was oil fouled while the other 3 were good.
I was thinking of using some kind of seperator in the line as well. Haven't tried anything yet but it shouldn't be too hard to fix.
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70amxvegas
AMC Nut
Joined: Apr/26/2009 Location: Lost Wages Online Status: Offline Posts: 196 |
Quote Reply
Posted: Jul/26/2010 at 12:33pm |
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i was thinking the whole reason they invented the pcv was for smog etc. so why not just yang the pcv out and install a paper breather like the ones that install on top of valve covers. this wil be a free continues vent , yes it may be not green but my open headers make up for that ?
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jeremy0711
AMC Addicted
Joined: Dec/12/2008 Location: Evansville, IN Online Status: Offline Posts: 585 |
Quote Reply
Posted: Jul/26/2010 at 1:49pm |
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what if you stick something inside the hose of some soft steel, aluminum or something with a small hole drilled in the center to restrict the vacuum. granted this might change your carb settings.
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whizkidder
Supporter of TheAMCForum
Joined: Mar/03/2008 Location: Tyrone, Georgia Online Status: Offline Posts: 1378 |
Quote Reply
Posted: Jul/26/2010 at 3:34pm |
Tried that. Didn't work for me. Slowed down the flow of oil from the PCV, but increased the amount blown out of the breather into the air cleaner tub.
Valley pan + intake baffle + scrubbing pad material (above baffle) + CORRECT PCV valve + fully seated rings = success. Edited by whizkidder - Jul/26/2010 at 3:35pm |
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greaser
AMC Apprentice 
Joined: Jun/26/2010 Location: maryland Online Status: Offline Posts: 13 |
Quote Reply
Posted: Jul/26/2010 at 6:15pm |
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This is how I solved the same issue on my car.. Wish I had access to the internet back then.. I use the fill cap that has the hose nipple on it. (1974).
That goes to an inline pcv valve I got from the rack at Advance Auto.. Don't know the part No. I just eyed it up.
In the manifold grommet I used a heater hose type of nipple and run this to a foam filled plastic thing that sits inside the air cleaner housing..
Basically just reversed the flow of the pvc system.
It does work well.
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70amxvegas
AMC Nut
Joined: Apr/26/2009 Location: Lost Wages Online Status: Offline Posts: 196 |
Quote Reply
Posted: Jul/26/2010 at 10:41pm |
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sounds like we have a different routing then a 70 ?
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PHAT69AMX
AMC Addicted
Joined: Jul/07/2007 Location: SW Ohio Online Status: Offline Posts: 2278 |
Quote Reply
Posted: Jul/26/2010 at 11:53pm |
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Think he's saying he changed the direction of the PCV "path"
by putting the PCV Valve in the hose off the Oil Filler cap.
So "out" is now from the Oil Filler Cap, and "in" is at the back of the intake.
Reckon with the Oil Filler cap way up on top of that long oil filler tube
it prevents the PCV Valve from sucking any oil..........
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