1988 2.0 PCV Valve (1988, carbureted)

[hfsdude007]

A few months ago, the stock valve cover oil cap/ PCV valve thing started letting oil blow into my air breather, which in turn was sucking oil into my motor. I replaced it with a new PCV valve and gromet. The gromet fits, but the two notches on the valve cover that allow the stock cap to latch on are allowing oil to leak out all over the place. The auto parts stores in my town do not carry a better replacement, so Im kind of out of ideas. Im getting tired of adding oil every week, and im also tired of the burning oil fumes getting into the cab. Please help.

Thanks,
Tom

 

[Mark_88]

I just replied to another thread about this very thing...I had the 2.0 engine originally and had the exact problem...oil being forced out the top end...and foam out of the dipstick on mine...

You may be able to correct it by checking the cannister under the intake manifold to see if that is plugged...and replace it and the PCV valve since this is supposed to ventilate the block.

You can also consider replacing the valve cover with one from a later model...on the 2.0 the oil filler is at the back of the engine...which I always found to be a PITA...I put one on from a 90 something with the screw-on cap...these also have an actual tube that you can attach a breather hose to run into the breather...and you can also move the breather hole to the front if it's more convenient...there should be holes in the breather...IIRC (if I recall correctly)...

I will see if I have a current pic...

 

[hfsdude007]

Is there a specific name of this 'cannister' that you are talking about so that I can refer to my chilton manual to replace it if need be? Also, what can I do to better seal the PCV Valve on the Valve cover if replacing the valve cover completly is not an option? Oil blowing past the PCV valve is not so much the problem as oil leaking through the gromet itself due to it not fitting as well as it should. I would like to replace it with an OEM part, but I can not find one anywhere.

Thank you for your input,
Tom

 

[Mark_88]

Maybe I'm confused...you should NOT have a PCV on the oil filler cap...there is just a vent hole and some wadding on the cap...and the hose goes to the breather to draw air into the top of the enging...

The actual PCV valve should be on the end of an "S" shaped hose (more like a ~ actually) that runs from a small cannister that sits below the intake manifold...drive side...that cannister is supposed to help keep the oil in the block...the PCV then runs to the base of the carb...if your vacuum is low or the line is plugged anywhere it will cause excessive pressure in the engine and the oil will exit from all or any openings available to it.

On my engine this was actually caused by wonky valves and rings...but I managed to put almost 200,000 Km on it before it finally croaked. It just went through plenty of oil in the process of killing my bank account.

Once you check those components and replace whatever is necessary, if you still have a problem then you should look into compression and leak-down tests to see if the engine needs an overhaul.

The good news is that these engines are very durable and can survive low oil remarkably well...I used to put Lucas oil treatment in mine (among other things like Molyslip) to keep it lubricated in the event that the oil shot out faster than I could put it in...

In the short view, the above steps may help alleviate the problem to the point of extending the engine life till you can find a suitable replacement...in the long view...start looking for a replacement asap if the situation persists...it took me two years to figure out that I could have saved myself a ton of money just by replacing the engine (or rebuilding it)...