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post #1 of 9 (permalink) Old 03-15-2019, 08:16 PM Thread Starter
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Oil in air intake, and on air filter

My 04 wagon baby has just recently started to leak oil onto the air filter, which is certainly a good sign. It's finally decided to reduce the friction of the air, leading to higher performance!

All jokes aside, this seems like it would be my PCV valve stuck open, or closed(hopefully open) right? Or would there be something different I'm missing? Nothing really smokes or anything like that, but I have also noticed it smells EXTREMELY rich on start-up, if that has anything to do with it at all 😕


Thanks.
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post #2 of 9 (permalink) Old 03-15-2019, 08:29 PM Thread Starter
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I see that it's coming straight from the Valve cover hose to the intake, leaking down to the filter. I'm even more positive that it's the PCV. But would it be stuck open or closed? As it's been driven a little since I've found out about it. A little worried.
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post #3 of 9 (permalink) Old 03-15-2019, 09:54 PM
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Originally Posted by SlowCarFast View Post
I see that it's coming straight from the Valve cover hose to the intake, leaking down to the filter. I'm even more positive that it's the PCV. But would it be stuck open or closed? As it's been driven a little since I've found out about it. A little worried.

Hey there.
My list for this is:
1. PCV malfunction. Replace the valve and upgrade the hose to the reinforced design. AJTT-13-89Y
2. Worn Piston rings.
Odds are it is either a faulty PCV valve or the PCV hose is collapsed...or both.


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post #4 of 9 (permalink) Old 03-16-2019, 03:07 PM Thread Starter
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Originally Posted by DrFeelGood View Post

Hey there.
My list for this is:
1. PCV malfunction. Replace the valve and upgrade the hose to the reinforced design. AJTT-13-89Y
2. Worn Piston rings.
Odds are it is either a faulty PCV valve or the PCV hose is collapsed...or both.

It's not the Piston rings. Well, maybe. But even if it is, it's not. I refuse to believe 😛

What do you mean by the PCV hose collapsed? The hose that comes right off of it?

Also, is the dealership still a good place to pick up a PCV valve, or are there better options now? I've seen threads from 2015 that talk about it, but I haven't come across any newer ones.


Thanks a lot 🙂
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post #5 of 9 (permalink) Old 03-16-2019, 03:42 PM
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PCV and/or hose are restricted or clogged.

Science behind it: All engines experience blow-by which contaminates the oil and pressurizes the crankcase. PCV valve is supposed to apply a regulated vacuum to the crankcase to evacuate the fumes, and draws in fresh air from a tap on the air intake side.

When the PCV (or hose) are restricted or blocked, the pressure is relieved through the air intake side; along with any oil mist it may contain.
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post #6 of 9 (permalink) Old 03-16-2019, 04:40 PM
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Originally Posted by SlowCarFast View Post
It's not the Piston rings. Well, maybe. But even if it is, it's not. I refuse to believe 😛

What do you mean by the PCV hose collapsed? The hose that comes right off of it?

Also, is the dealership still a good place to pick up a PCV valve, or are there better options now? I've seen threads from 2015 that talk about it, but I haven't come across any newer ones.


Thanks a lot 🙂

You can pick all that up at the dealership or online. It just depends on how much you want to pay and how long you want to wait.

Be advised there are two PCV valves and I believe they changed either late 2004 or 2005. There is a long and short version. The hoses that connect them from the intake manifold are also different.
The hose pictured on the left will collapse flat but one on the right with the reinforcement will not collapse.


For part numbers there is a bit more here on this thread.


Both will fit all years, the only consideration is the valve needs to match the hose.


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post #7 of 9 (permalink) Old 03-16-2019, 05:52 PM Thread Starter
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Quote:
Originally Posted by DrFeelGood View Post


You can pick all that up at the dealership or online. It just depends on how much you want to pay and how long you want to wait.

Be advised there are two PCV valves and I believe they changed either late 2004 or 2005. There is a long and short version. The hoses that connect them from the intake manifold are also different.
The hose pictured on the left will collapse flat but one on the right with the reinforcement will not collapse.


For part numbers there is a bit more here on this thread.


Both will fit all years, the only consideration is the valve needs to match the hose.


Ohh okay. Thanks a lot! Mine most definitely is the first one. I'll see if I can't pick up the updated hose and PCV. Seems like a good idea to upgrade that.

Thanks again 🙂
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post #8 of 9 (permalink) Old 03-16-2019, 11:13 PM
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I also noticed a moisture in my air hose when I did my airbox mod today. Is this why my car smells like gas every time I start it and/or turn on the heat? Guess I'll have to do this when I replace my spark plugs and do the egr mod.

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post #9 of 9 (permalink) Old 03-17-2019, 06:45 PM Thread Starter
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Originally Posted by ignis0 View Post
I also noticed a moisture in my air hose when I did my airbox mod today. Is this why my car smells like gas every time I start it and/or turn on the heat? Guess I'll have to do this when I replace my spark plugs and do the egr mod.
My car smells so strong of gas when I start it. I don't think it did when I first did the airbox mod though. I always just assumed mine did because my whole rear interior is stripped 🤷
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