which one sucks which blows pardon the pun but im confused re oil in breath <img src="/forums/images/graemlins/confused.gif" alt="" />er big jim help me please

Pardon but I don't understand the question... ALL vac is negative pressure. If refering to the pcv it's job is to take the negative pressure in the carb area and allow the pressure in the valve cover to leak into the intake.
The OTHER hose on the valve cover is there to supply fresh air to the valve cover in newer engines. (ones that don't yet have blowby) If an engine has too much blowby for the pcv to handle The second hose can be attached to a vac source and between the TWO hoses the blowby should be taken care of.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

Thanks I was refering to you saying positive vacuum so your saying try adding another pcv valve and teeing in Ill try that thanks

I havn't bothered with a pcv...I just connect it to vac and go on about my business.. The pcv is only there to prevent a possible fire...Which wouldn't have occured in any of the engines built to date..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

wouldnt that dump oil right into the combustion chamber?

SO? It will take the internal pressure out of your engine.
That pressure will cause seal leaks if it hasn't already. And that small amount of oil will go unnoticed in the engine..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

Think about it this way. Atmospheric pressure at sea level is 14.7 psia, so anything that has a higher pressure than 14.7 psia will be a ôpositiveö pressure, or will ôblowö. Anything less than 14.7 psia will be a ônegativeö pressure, or a vacuum, and will ôsuckö. The other thing to think about too, is when you fill up your tires, you are looking at a gage pressure and not an absolute pressure. Hopefully this helps.

Sean

Gonna try that tomorrow,I ahvent blown any seals the oil is just all over the garage floor.as it comes out the breather the motor is brand new (10k)

Something sounds wrong there, a good motor shouldn't have ANY oil in the air filter box.