crankcase pressure problems!!! help please!

[tx65coupe]

thats not the pcv valves fault. sounds like something else is wrong. PCV valves are good for the engine they help keep it clean. I used to run without one and the oil vapors that came out of the breathers(even with a filtered one) just got all over the hood and made a oily dirty film all over. Put the pcv system back in.

The PCV is actually good for the engine though. It allows blow by vapors to get removed by getting sucked back into the intake system. while these get removed fresh air enters your engine through the breather. this keeps the highly acidic and corrosive blow by gases to not eat up your oil and metals inside the engine.

If you are getting anything but gases/vapors high enough up to go through your PCV/Breather valve you got other problems. do your valve covers have baffels in them? excessive blow by? could possibly even have a oil return problem, maybe oil is not draining out of the heads as fast as your pump is pumping it. If your heads are filling up with oil, this closes off the path to the breathers/pcv effectively making it a closed system, which ended up turning your dipstick into a pressure relief valve.

Im just throwing some other stuff to look at.

Also a vacuum pump is no different than a PCV valve with the exception of being engine driven instead of vacuum from the intake. You're still going to be sucking oil.

I agree completely with this.

 

[JR4 Motorsports]

if you don't want to use a PCV, how about this:

Crankcase Evac System

It should solve the oil mist problem, and may help HP (a little)

If you want to run the "smog pump vac system" you have to put some sort of oil seperator before the pump, but even then they die quickly. I can't see spending 700+ for a vac pump on a daily driver, but that is an option as well.

 

[blackstallion12]

Sorry, most setups I have seen don't make power after about 6k.



Don't feel bad, we all have issues that take us a while to figure out. Don't let it discourage you from your project.



When you say PCV caps, what exactly are you referring to, the oil breather cap or the rubber grommet that the PCV sits in?

i dont know it just seems as though the diameter of the little spout leading off the pcv cap is too small and could possibly get clogged up quickly. im going to reibies this morning to get a cheap pcv and give her a try.

 

[tx65coupe]

Yeah, the nipple on the PCV does look a bit small, but thats the size it is on most cars/trucks I have seen.

 

[rbohm]

I tried to do that by modding the stock smog pump to suck, instead of blow. It didnt work and unfortunatly it ruined the pump, but it was a good idea.... in theory, haha

thats why i suggested using a vacuum pump from a diesel engine. it was designed to pull a vacuum.

 

[blackstallion12]

I KNOW WHAT WAS WRONG!!!!!!! I never like pcvs because i bought very cheap INEFFECTIVE Chinese made breather/pcv valves.... when they make these horrible products they fail to weld or seal these caps so basically i was bolting on an air leak to my carb.... it wasnt pulling ANY air from the valve cover it was just coming out the side of these cheap pcvs. BUT i bought the correct AMERICAN MADE 90 degree pcv and it works amazingly!!!!!! I am so happy. Life is great. The car revs quicker, revs higher, runs cleaner, the system is working. i pulled the breather on the other side with the car idling and i can feel air being taken in so it actually is working...

So if my exciting bable was confusing, basically i hated pcv valves and didnt believe in them because i was buying Chinese garbage instead of the right stuff.

Im so happy guys thanks for your knowledge!!!!!

Never buy Chinese garbage is the moral to my lil situation.

 

[tx65coupe]

Thats cool that its working right now. I wish there was no such thing as made in china parts, 90% of them suck.