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Unread 07-30-2002, 07:39 PM   #1
jamsonstill
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oil in air filter box

My 89 2.5L is getting oil blow-by to my air filter box. I think I will either need a valve or piston ring job. The second cylinder is showing no compression. Not good... Does this sound like it could be my problem? If this is a big problem what would it cost me?Any advice or thoughts would be welcome. I kind of am not too familiar working on engines. Thanks

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Unread 07-30-2002, 08:20 PM   #2
Jeepfreak81
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almost same problem

i pulled my filter box off tonight and have oil all over hose leading fromt he box to the throttle body and it was coating my throttle body, but i have 1792xx miles on mine and never ran better, i am almost certain i dont have a compression issue, but its kind of the same problem, oil in the air box with a 2.5... i also would like to know whats going on?? help??
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Unread 07-30-2002, 09:31 PM   #3
NaeKid
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I believe this question was asked and answered a couple days back in the oil problems message.

For jamsonstill, I would seriously look at a full tear down of the engine as soon as possible, or start to look for a replacement engine for your vehicle. If you have no compression in one of your cylinders, it would mean either your valves are screwed, or your piston rings are screwed. A visual check would be in order.

For JeepFreak, if you have oil in your airbox with the 2.5, check the PCV valves (mounted to the valve cover) and the hoses that connect them. You should be able to blow air from your lungs through the two parts. If not, see about cleaning them both out, or just replacing. Verify that you don't have a compression problem while you are digging around (if you have a tester handy) .. just to make sure.
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Unread 07-30-2002, 09:51 PM   #4
Jeepfreak81
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PCV valves... all i have is that dang hose??? as far as i have looked under the hood... is it in the hose someplace? i tried to find a pcv valve when i first saw it cause i had the problem in my s-10 too
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Last edited by Jeepfreak81; 07-30-2002 at 09:53 PM..
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Unread 07-31-2002, 08:31 AM   #5
StumpJumper
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Your pcv is on the end of the hose at the valve cover. It's the black or silver piece that goes into the end of the hose and into the rubber grommet that fills the hole in the valve cover.

I had a bit of pressure, too. When I put on my alluminum valve cover, I got an edlebrock breather/oil cap that goes where your oil fill hole is. It pops in with a grommet and has a screen type "filter" in it. It has all but eliminated the oil going through the original vent hoses going into my breather. This cap is old school and was what was used before the famous pcv valve. Every oil change, just pop it out(you have to to put more oil in) and clean it with whatever you want to clean it with.

Look here http://www.edelbrock.com/automotive/index.html and go to accessories and then to oil fill hole plugs and scroll up to see the breathers. They don't look like much, but they work.

hth

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Last edited by StumpJumper; 07-31-2002 at 08:36 AM..
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Unread 07-31-2002, 12:52 PM   #6
bugeater
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if your 2.5 is like mine there will be no pcv valve. there was a brass hose barb threaded into the valve cover that the hose connects to. the hose barb has an orifice made into it. if the orifice is blocked with gunk (mine was) it will force crankcase vapors back into the air box. i think i took mine out with a 7/16" wrench, socket, etc.
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Unread 07-31-2002, 04:18 PM   #7
Jeepfreak81
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what year is your bug eater?? cuz i am almost certain there is no pcv valve on mine, i know what one looks like i am no stranger to engines....
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1946 CJ2A, 225 V6, T98 D18, Warn OD, D30/D44. Dual winches mild lift & 34's
1966 M416 1/4 ton Military Trailer Expo Trailer
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Unread 07-31-2002, 05:00 PM   #8
UPnOVER
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Sorry but it's time to rebuild. I feel your pain. I just did my 4.0l and it was $3,500 big ones. I would think that a 4 banger would be cheaper. Good luck
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Unread 08-01-2002, 05:22 AM   #9
bugeater
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mine is 94 the barbed fitting was on the left side of the valve cover at the front.
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