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Old 11-08-2009, 07:10 PM   #1 (permalink)
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Default Oil/Water in air filter!! Help!!!

I am getting a little bit of oil and water, mainly water in my air filter. Seems to be coming from the hose connected to the PCV valve and the top of the engine. I replaced both the PCV valve and the air filter and there still seems to be a little water mixed with a little oil coming into the air filter area. Can anyone help please? Car runs well but do have fairly bad fuel consumption!! Maybe it is not water but gas, not sure, will check tomorrow. Could it be gas leaking through a torn diaphragm on the fuel pump? This could explain the bad fuel consumption maybe!!

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Old 11-09-2009, 01:01 AM   #2 (permalink)
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if the diaphragm was torn, the pump would be leaking gas out the bottom drain pipe. If there's oil/water blowing through your pvc into your air cleaner, then you probably have water in your oil as well. Check your dipstick and see if there's an creamy consistancy to the oil. Also check your coolant to make sure oil hasnt gotten into that. You could have a dammaged head gasket or warped head that is allowing water and oil to mix.

I had an issue a while back with heavy blow by on my cylinders. The large amounts of exhaust gas being churned up with my oil was causing it to be creamy and gooy looking. It was also causing a lot of crank case pressure and I was blowing a lot of creamy oil into my PCV. My big issue was being caused by poor valve timing, and a loose valve guide.
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Old 11-09-2009, 09:01 AM   #3 (permalink)
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Thanks Baratacus!! I will check my oil today as well as the coolant. I have put in a new PVC, would oil/water still get through it even if it is new?
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Old 11-10-2009, 10:49 PM   #4 (permalink)
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Ok so there doesn't seem to be oil in the coolant. The milky brown looky stuff seems to be coming from the pipe from the top of the crankcase cover. When I took off the hose from the top of the crankcase, more milky brown stuff came out the other end into the air filter housing. I checked the dipstick and the oil seems clear. I did buy this vehicle a few weeks ago so maybe the oil was changed just before I bought it. I thought I should give it an oil change and new oil filter. Any suggestions on what to do? Maybe replace the headgasket?
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Old 11-11-2009, 02:30 AM   #5 (permalink)
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Sorry my last post seems to have dropped, but in response to your question about the PCV valve. The PCV won't filter your air coming out of the case. It's just a one way valve that allows excess pressure to bleed off. There is always going to be SOME amount of blow by into the crank case, but if it's enough to blow a significant ammount of oil all the way through to your air filter housing then there's too much.

New post responding to your latest developments:

That sounds almost identical to the problem I had. You should have the valve gap checked and adjust the valve lash and timing. Once you have that done, you can do a compression test to make sure everything is seating ok.
If the valve seats are dammaged or the valves or springs are dammaged, it could be causing a loss of compression and excessive blow by.

One of my valve guides (I think cyl 3) came loose and was tick tapping really loud, especially under load. Most of my exhaust blow by was caused by the loose valve guide, but my valve lash was also off.

If you don't have any oil in your coolant and your oil in the pan looks ok, then it's most likely exhaust gas blowing into your crank case cover. The moisture and heat in the exhaust blowing into the case through the oil is probably what is causing the emulsification you are seeing and the excessive pressure blowing through the PCV valve.

On the up-side, your head and gasket are probably fine.
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Old 11-11-2009, 09:32 AM   #6 (permalink)
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Thanks for the advice!! I will attempt to do this work myself within the next couple of weeks and will then report back.
Thanks for the help, I really appreciate it!! I am still new to the samurai world but am loving it so far!!
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