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Discussion Starter #1
I have replaced just about every component BUT the Ventilation Breather filter on my 2.5, new PCV, new vacuum lines, vacuum lines are cleared... etc etc..

So is it safe to assume that the VBF is the cause of my oil blow-by? I'm not feeling it suck or push any air out.
 

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IIRC, that engine doesn't have a PCV, it has an AAV. Don't quote me but it is worth double checking.
 

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Discussion Starter #3
It has a PCV, the newer 2.5's don't have a PCV system.

And to answer my own question, no, the Vent Breather Filter didn't fix my issue. The ONLY thing that it could be is either sludge buildup or blowby with the piston rings :(
 

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As I said, I remember lots of talk about oil blowing out the cap, and that was the usual problem. I couldn't remember exactly what engine did not have the PCV.
 

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Sounds like it's time for an engine flush. Gunk makes a good one, and it's an hour type thing, then empty and refill. I'v been running ATF for about 2 hundred miles and lost the Diesel clicking by 80 + % and no doubt cleaned out a lot of the sludge. Synthetic will continue to remove the cruds and built up sludge.
 

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Seafoam maybe?
Have you ever tried Seafoam? I have seen that other people use it (on the "other forum") and some swear by it. Does it really help?
The guy at O'Reiley said it's great stuff.
 

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I was thinking for the 2002 Toyota Avalon. It's getting tired. Cheap Japanese junk needs some TLC.
My 1988 Jeep runs perfectly on the original engine and it has more miles than the Avalon.
 

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I used Seafoam in the fuel system of a Honda generator that had been left with fuel sitting in the carb for about a year. The generator would only run if the choke was left on, and then poorly. I ran 2 tankfuls through the generator and it cleaned it up great. Now runs like new. I have not run it in the oil but I personally would not hesitate.
 

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Took a last minute drive or north main divide last Sat. Really looking forward to Big Bear area. I will try to swing by one of these days and we can look at calendars. Right now, I am free most Saturdays.
 

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Discussion Starter #13
I've tried several engine flushes and nothing helps out, it just keeps spitting it out.
 

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Have you tried removing the oil filler cap while the engine is running? If you are getting pulsating pressure from the fill tube, you should be getting pressure from the PCV valve. If you are not getting pressure from the PCV but are from the oil fill tube then the new PCV valve is bad. If you are getting that much pressure though you probably have other problems. You need to do a cylinder pressure test. That much pressure is indicative of bad rings.
 

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Discussion Starter #15
I'm convinced at this point that my engine just needs a rebuild. I have no need to try and confirm something I highly suspect to be true. Plus I need an adapter for my compression gauge...

I've also tried 3 different PCV valves.
 

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I'm convinced at this point that my engine just needs a rebuild. I have no need to try and confirm something I highly suspect to be true. Plus I need an adapter for my compression gauge...

I've also tried 3 different PCV valves.
Don't they have a restrictor in the crankcase ventilation system that is prone to plugging?
 

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Discussion Starter #17
Don't know, if so, where would such restrictor be? The PCV has quite a bit of vacuum pressure on it.
 

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On 2.5L engines, a fitting on drivers side of cylinder
head (valve) cover contains the metered orifice. It
is connected to manifold vacuum.
A fresh air supply hose from the air cleaner is connected
to front of cylinder head cover on 4.0L engines.
It is connected to rear of cover on 2.5L
engines.
When the engine is operating, fresh air enters the
engine and mixes with crankcase vapors. Manifold
vacuum draws the vapor/air mixture through the
fixed orifice and into the intake manifold. The vapors
are then consumed during combustion.
 

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Discussion Starter #19
Sounds to me like a CCV equipped 2.5L, not a PCV equipped 2.5L.
 

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Took a last minute drive or north main divide last Sat. Really looking forward to Big Bear area. I will try to swing by one of these days and we can look at calendars. Right now, I am free most Saturdays.
I've used seafoam in my oil and I tell ya what.... It's magical. Cleaned up all the excess junk in the engine. Used it in the fuel system, brake booster and oil filler hole.
 
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