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oil on the air filter?

T

toph99

Diamond Member
i just took my mom's car in for an oil change, when the guy pulled the air filter it had some large smudges of oil on it. the car has 23000km on it, he said that around 25000 you should change the PCV valve, which is why there is oil on the air filter. This doesn't make much sense to me, as i didn't think the PCV valve had anything to do with the air filter. can someone explain this to me? there wasn't a great deal of oil on the filter, just smudges, but it wasn't so dirty as it needed replacing. Also, about when should i put in some fuel injector cleaner/valve cleaner, it has never had any at all.

Thanks 🙂
 
PVC is PolyVinylChloride, it's a type of plastic.
PCV is Positive Crankcase Ventilation, it's a smog reducing feature for cars.

On my car, the PCV port on the intake is far behind the air filter. It would be impossible to get oil on the air filter from the PCV valve. However, if your air filter is behind the port for PCV, It would very easily get oil on it. I have no idea what car you're talknig about, though.


edit: oh, and hte PCV stuff on my car isn't ewven hooked up 🙂 If I hook it up, the boost from the blower will blow the PCV valve off the back of the motor, and get oil all over everything.
 


<< PVC is PolyVinylChloride, it's a type of plastic.
PCV is Positive Crankcase Ventilation, it's a smog reducing feature for cars. >>



thanks, i can never remember which is which 😛 it's a 2000 olds alero, 2.4L 4cyl. The guy said that the valve wasn't in a place where he could change it easily/quickly, and we'd have to take it to a mechanic/dealer to get it changed. Said something about it being internal 😕


how does it reduce smog? i thought it just let out any built up pressure from inside the crankcase, so you don't blow the seal on your oil pan or anything
 
Any type of Crankcase ventilation would serve the purpose of keeping pressure from building up in there. Positive Crankcase Ventilation uses the vacuum created by the engine to suck fumes/etc from the crankcase into the cylinders, where they are buned with fuel, and then passed through the catalytic converters, hence being cleaner than jsut having a vent on the top of the motor where fumes can escape if they start building up pressure.

My car jsut has a vented oil cap and the PCV connections capped 🙂
 
ahh, i see 🙂 I think i'll ask my auto shop teacher if he knows how to change the PCV on this engine, save some money instead of taking it to the dealer
 


<< ahh, i see 🙂 I think i'll ask my auto shop teacher if he knows how to change the PCV on this engine, save some money instead of taking it to the dealer >>



On my 302, the PCV vavle sits right behind the intake manifold, attached by nothing but a friction fit. It costs $2.50 and takes 30 seconds to change. You jsut reach around there and pull the old one off, and drop a new one in.
 


<<

On my 302, the PCV vavle sits right behind the intake manifold, attached by nothing but a friction fit. It costs $2.50 and takes 30 seconds to change. You jsut reach around there and pull the old one off, and drop a new one in. >>



like i said, the guy who was doing the oil change looked up in a manual where it was, and he said it was in a place that he couldn't get to for whatever reason. I can't remember where he said it was exactly, because he wsa telling my dad and i was reading my book, but it was somewhere inside(in the intake manifold maybe?) and my parents don't trust me poking around in the engine compartment 😉 i still have a lot to learn
 


<<

<<

On my 302, the PCV vavle sits right behind the intake manifold, attached by nothing but a friction fit. It costs $2.50 and takes 30 seconds to change. You jsut reach around there and pull the old one off, and drop a new one in. >>



like i said, the guy who was doing the oil change looked up in a manual where it was, and he said it was in a place that he couldn't get to for whatever reason. I can't remember where he said it was exactly, because he wsa telling my dad and i was reading my book, but it was somewhere inside(in the intake manifold maybe?) and my parents don't trust me poking around in the engine compartment 😉 i still have a lot to learn >>



Well, I'd trust you to change the PCV valve on my car 🙂 heh, even if you didn't put the new one on, the car'd still run fine since it's not hooked up 🙂
 


<< Well, I'd trust you to change the PCV valve on my car 🙂 heh, even if you didn't put the new one on, the car'd still run fine since it's not hooked up 🙂 >>



i help my friend do work on his 302 in his F150, things are so much easier to find on there than on this 4 banger. wires running every which way, things which i have never even heard of before and all sorts of confusing stuff. I spent a half hour looking for a dipstick for the tranny, only to find out it doesn't have one. Maybe that's why i like older cars, so much simpler 🙂 even my dad's V6 is easier to find things on, at leas the spark plugs are in easy view there. took me a while to find them on this one, as i couldn't see the distributor to even follow the wires. confusing engine 😱


edit: i just went out and looked again, i remember it wasn't the spark plugs i found, it was the fuel injectors/fuel rail. I still can't find the plugs, no wires or distributor are in plain view, i'll have to find a repair manual and see if i can find them
 
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