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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: greenmonster on January 17, 2008, 10:05:25 am
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I have a milky substance on my pcv valve, what is it.
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Milky looking, usually it means water in the oil. What does you dipstick look like?
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The stick is clean.I did a tuneup 2 weeks ago oil change and installed a pcv valve.It had two filters in driver side valve cover.I took one out and put a pcv valve in and left the other filter in.When I did the oil change the old oil was clean but the filters had the milky stuff on them and they leaked oil so that is why I put in a pcv valve.
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If you had no PCV before then you probably had a lot of condensate inside the engine. You can run a 15 minute flush and try changing the oil but I wouldn't be freaked out over it if the oil isn't overfull and creamy.
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There is nothing in the oil. Should I get a oil cap and get that filter out of there or do I need it for the pcv valve to work.
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You need the filter to work with the pcv valve
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Ok thanks.I thought it needed to take in air for it to work.
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Definitely. PCV valve in one vc going to your main vac port at the front of the carb and a breather element in the other VC
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Do you not have a PCV Valve on the right side valve cover??? If you do, then you only need that one, and a filter for one of the locations on the driver's side cover, and the other one can be replaced with an Oil Cap(No real need for a second PCV, especially if it isn't connected to the carb).... Also be sure that the gromment for the filter and PCV haven't dried out, as that can allow condensation in to contaminate the PCV/Filter, and even your oil....
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I have the pcv valve in the drivers side vc and the oil fill cap (where I have the filter installed)is in the driver side valve cover too.I don't have any holes in the passenger side vc.
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What kind of VC's do you have? Usually there is a knock out location so you can put in a grommet
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They are holley aluminum vc.They are like the old M/T vc but they say holley on them
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You should knock out the other hole and run the breather on the other valve cover to have proper crankcase ventilation.
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You should knock out the other hole and run the breather on the other valve cover to have proper crankcase ventilation.
+1 Agreed, needs to have a balanced ventillation between the two sides... Breather Filter on one side, and a PCV on the other. Doesn't matter which side has what, just make sure to properly connect the PCV to the Carb. The Breather also needs to have a baffle insert(Looks like a coin/plate with a screw on each side holding it in place) below it, so you aren't just sucking oil, and blowing it out all over your engine compartment.
Holley Breather Baffle:
http://store.summitracing.com/largeimage.asp?part=HLY-241-218&Prod=Holley+Valve+Cover+Breather+Baffles&img=hly-241-218_w.jpg
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So there is another hole.I should take the valve cover off and knock it out or do I have to cut it out.
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My M/T's look like the should just simply knock out (already had enough plugs removed when I got them), but to be safe I would use a hole saw.... I'm sure someone else may chime in as to what you could do....
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if u dont have a knock out I would only use a hole saw if the area is flat ..And only cut the hole as big as u need to fit the grommet ..And mask the area off..And make sure you use oil when cutting the hole and let the saw do the work so u dont dent and warp Ur valve cover. and make sure the cover is off the engine..And make sure when ur done u clean it all up so it will be free of any metal flakes
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don't forget to try to add a baffel to the inside of the valve cover to keep oil from sucking into that pcv