I have an 84 CJ7 w/ 4.2 litre and I noticed some new oil leaks. When I
looked for them I realized that there was oil coming into the air filter
through the hose attached to the rear of the valve cover. There was so much
oil that it was being sucked into the carb and seriously fouling the plugs.
Besides a rebuild, and driving without oil, what could I do to stop this?

Thanks

 

Mike,

I think maybe you mean PCV valve?

Chris


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F142FC0.C9A81F3B@sympatico.ca...
> If your EGR suction has died, you will have those symptoms.
>
> First pull the EGR and give it a shake. A good one will rattle.
>
> Then follow the EGR tube to the back of the carb and check real close on
> the elbow by the valve cover for a collapsed part. The elbows go soft
> and suck flat.
>
> If all is ok there, then look behind the carb for a T fitting or
> solenoid thing. If you have a solenoid and it has died, it will blow
> oil. The solenoids were a defective part and a straight T fitting is
> the proper fix.
>
> At this T or solenoid, trace the other line to the top of the charcoal
> canister. At idle pinch this line to the canister closed. If the idle
> changes the canister is dead and a ton of oil will blow into the air
> filter.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Johnathan Marrin wrote:
> >
> > I have an 84 CJ7 w/ 4.2 litre and I noticed some new oil leaks. When I
> > looked for them I realized that there was oil coming into the air filter
> > through the hose attached to the rear of the valve cover. There was so
much
> > oil that it was being sucked into the carb and seriously fouling the
plugs.
> > Besides a rebuild, and driving without oil, what could I do to stop
this?
> >
> > Thanks

 

Hi Rob,
I would convert to the regular PCV valve and do away with solenoid
controled orifice. I couldn't find the recall, but I'm sure there was,
because the system didn't work. Anyway, you should be able to find a
pipe fitting to fit the manifold, and tape the electrical connection.
Also make sure the valve cover is free, sometimes the baffles carbon up.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Rob Kassabaum wrote:
>
> I'm having the same problem with a 2.5L in a '91 YJ. I haven't done a
> compression check yet, but I will this afternoon. There is no PCV valve on
> this engine. Is there anything else other than just straight blow-by that
> could be causing this much oil in the breather? If so, how do I test it?
>
> Thanks

 

You have a CCV system. It plugs up easy too.

There is a small plastic tube and a rubber grommet that plug up.

Here is a link on the CCV system:

http://www.off-road.com/jeep/cheroke...ltr/blowby.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Rob Kassabaum wrote:
>
> I'm having the same problem with a 2.5L in a '91 YJ. I haven't done a
> compression check yet, but I will this afternoon. There is no PCV valve on
> this engine. Is there anything else other than just straight blow-by that
> could be causing this much oil in the breather? If so, how do I test it?
>
> Thanks