[RESOLVED] really bad oil leak...need help!!

[LTUDSM]

hey guys,today i woke up, and i saw a huge spot of oil under my car.I opened the hood,and the was oil marks on top of the tranny case.I cleaned that up to see where is leaking.But while the engine is not running,the oil doesnt leak.So i took the car for a spin,came back home,opened the hood,and again i saw oil all over the place.My question would be: is there some kind of bolt ,which is on a block somewhere,that could cause me that leak??? or there is something else related to that oil leak???

 

[LTUDSM]

ok i was reading the forum (using a search button) about the crankcase pressure,and i came up with one thing:
what if i have a very high crankcase pressure,which allows blowing my rear crankshaft oil seal,would it be possible???? because when i bought the car,i never change a PCV.its being 4th year, that i have the car.
plus i got a greddy oil catch can,and one of the hose is connected to the valve cover breather, and another hose is just routed to the bottom.Is that a good ventilation or no??
I got barely 40 miles on my new engine, which was builted by JNz Tuning.And the piston rings couldn't be bad .they checked compression after they rebuilted it,and it was 179 across the board.So i think my crankcase ventilation is no good.... BTW, my dipstick is popping out,i can see smokes coming through my valve cover breather Any suggestions???

 

[architechnik]

Referring to the stock setup, the valve cover should circulate metered air in from the intake system and through the pcv end into the intake manifold. If the pcv system is not working properly then it will not have any flow.

If you have a catch-can/breather-filter setup then the pcv will not operate in quite the same form. There is no through-flow for fresh air to travel into the valve cover and pulled through the pcv to your intake.

If you remove the breather and route that end to the intake snorkel then you have effectively created the correct scenario for air going into both and keeping oil out of your intake. The absolute best setup uses two catch cans, one between the pcv and intake manifold. This still will not work if you have not replaced your pcv, though. Some people have used a bypass valve after the catchcan and removed the pcv, creating a more durable, accurate setup.

 

[LTUDSM]

Referring to the stock setup, the valve cover should circulate metered air in from the intake system and through the pcv end into the intake manifold. If the pcv system is not working properly then it will not have any flow.

If you have a catch-can/breather-filter setup then the pcv will not operate in quite the same form. There is no through-flow for fresh air to travel into the valve cover and pulled through the pcv to your intake.

If you remove the breather and route that end to the intake snorkel then you have effectively created the correct scenario for air going into both and keeping oil out of your intake. The absolute best setup uses two catch cans, one between the pcv and intake manifold. This still will not work if you have not replaced your pcv, though. Some people have used a bypass valve after the catchcan and removed the pcv, creating a more durable, accurate setup.

what would you suggest me to do,if im running blow through setup (gm maf setup),i don't have any extra nipples on my Dejon air intake tube?? Can i replace PCV with a straight 3/8 size nipple and run a hose to the oil catch can from it.So my setup would be like this: one hose from a VC breather to the oil catch can and another hose from a straight nipple(instead pcv) to the oil catch can,would it work??

 

[architechnik]

There really is no way to circulate the air with that setup you suggested. Since you have a straight-through setup you could just throw the breather on the valve cover, then use a nipple to replace the pcv.

The problem is that if you do not have something restricting the airflow from going back under boost, then it will just spray oil out the side. You need to get some sort of air going into the VC and pulled through by vacuum during idle (neg mani pressure/pos CV) but closes under boost (pos mani pressure).

That's why most people use two oil cans, but it can be done with only one on your setup... move the PCV valve and route a nipple to hose to the catchcan. On the other end of the can, put a hose to nipple and small brass fitting tube that the PCV valve can screw into between the intake mani and the can. Then just throw the breather on the other end of the VC.

Savvy?

EDIT: Quick note: Get rid of that clear plastic tubing. That stuff is junk! I just got rid of mine a month ago after having it on there for a several months and couldn't figure out why I kept getting all these boost leaks.

 

[LTUDSM]

There really is no way to circulate the air with that setup you suggested. Since you have a straight-through setup you could just throw the breather on the valve cover, then use a nipple to replace the pcv.

The problem is that if you do not have something restricting the airflow from going back under boost, then it will just spray oil out the side. You need to get some sort of air going into the VC and pulled through by vacuum during idle (neg mani pressure/pos CV) but closes under boost (pos mani pressure).

That's why most people use two oil cans, but it can be done with only one on your setup... move the PCV valve and route a nipple to hose to the catchcan. On the other end of the can, put a hose to nipple and small brass fitting tube that the PCV valve can screw into between the intake mani and the can. Then just throw the breather on the other end of the VC.

Savvy?

EDIT: Quick note: Get rid of that clear plastic tubing. That stuff is junk! I just got rid of mine a month ago after having it on there for a several months and couldn't figure out why I kept getting all these boost leaks.

did i get it right????

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BTW what plastic tube you are talking about???

 

[architechnik]

You got it!!

Oh, on some of those pics, the hose that's going from the pcv valve to the intake mani is a semi-clear reinforced plastic. If it's the same material as I'm thinking, it will not create an appropriate seal around all the connecting points. It get's too hard and does not form to the ribbed nipples.

I could be wrong, it might be a little bit different material. But, if you take it off a npt end and little bits of plastic come off with it, or you can easily twist the nipple even when clamped, then it's not the right stuff.

 

[LTUDSM]

You got it!!

Oh, on some of those pics, the hose that's going from the pcv valve to the intake mani is a semi-clear reinforced plastic. If it's the same material as I'm thinking, it will not create an appropriate seal around all the connecting points. It get's too hard and does not form to the ribbed nipples.

I could be wrong, it might be a little bit different material. But, if you take it off a npt end and little bits of plastic come off with it, or you can easily twist the nipple even when clamped, then it's not the right stuff.

i used that hose temporary from intake manifold to blow off valve,but i replaced that with high temp silicone hose BTW,is there anything else that could cause me a high pressure in crankcase? besides bad rings and bad PCV????

 

[architechnik]

Valve seals and guides can get a lot of pressure through them as soon as you hit high boost (mostly on the intake side). I've got my dipstick held with a spring looped over the the end and attached to a small hose clamp. Mine kept blowing out and spraying little bits of oil and this allows it to release some of the pressure and still close quickly.

Rings and valves are really the only places that the pressure spikes originate. There's just a certain threshold that's supposed to be normal for engines and we always go way past that with forced induction.

 

[LTUDSM]

ok i got it now well i had a high pressure in crankcase before i rebuilt the engine,then the valve stem seals and piston rings were bad,so i was blowing dipstick,and leaking oil from a HG that time also, Tomorrow im gonna go to ExtremePsi and grab a new rear crankshaft oil seal,the new case for the oil seal,new pcv and a new breather.ill come back with the results as soon as i fired up the motor I hope im gonna get lucky this time